Class / Patent application number | Description | Number of patent applications / Date published |
227010000 | With plunger | 59 |
20080203133 | Hand-Held Power Tool - A hand-held power tool is provided, the operational power of which is provided by a gas combustion mechanism. The gas combustion mechanism comprises a first priming cylinder ( | 08-28-2008 |
20080217372 | Fastener Driving Tool - A fastener driving tool comprising a tool nose through which a fastener is fired and a loading apparatus for introducing the fastener into the tool nose. The fastener is propelled by a gas combustion mechanism comprising a first priming cylinder having a first piston and an air intake fluidically connected via a first valve apparatus to a second delivery cylinder having a second piston. The first priming cylinder is fluidically connected to a fuel gas reservoir via a second valve apparatus. The first priming cylinder receives fuel from the reservoir and air through the air intake to form an air/fuel gas mixture therein. The first piston compresses the air/fuel gas mixture and transfers the air/fuel gas mixture to the second delivery cylinder via the first valve apparatus. The air/fuel mixture is ignited therein and urges the second piston towards the fastener and propels the fastener away from the tool nose. | 09-11-2008 |
20080251560 | Indirect Fire Device for Fixing Fasteners in a Substrate Material - The indirect fire device for fixing fasteners ( | 10-16-2008 |
20080251561 | Quick connect base plate for powder actuated tool - A tool is provided with a barrel having a piston for driving a fastener into a substrate, the barrel being mounted for axial movement within a body of the tool and a nose piece being mounted forwardly of the barrel and being at least partially encapsulated by a base plate that connects to the receiver of the tool which encloses the barrel and piston, the present invention permiting ease of assembly and disassembly of the muzzle of the tool—the nose piece and base plate—by making the connection between the base plate and the receiver with a retainer element. | 10-16-2008 |
20080251562 | Internal-Combustion Gas-Powered Hand Tool - The tool comprises a piston which can be propelled under the action of the explosion of a mixture of gas and air to drive an element, a first, gas-metering chamber, a second, gas-air mixture-preparation chamber, designed to communicate with the first chamber, and a third chamber designed to communicate with the second chamber, which is delimited by the piston and which is a throttling and propulsion chamber. | 10-16-2008 |
20080302846 | EXPLOSIVE DISCHARGE ACTUATED TOOL FOR DRIVING FASTENERS - An explosive discharge actuated tool for driving fasteners has a barrel with a closed bore, an interchangeable nose piece to accommodate different length fasteners and a piston that is manually reset to firing position by a spacer-fastener being inserted into the barrel. | 12-11-2008 |
20080308593 | COMBUSTION TYPE POWER TOOL - The combustion type power tool includes a housing accommodating a combustion chamber and an ignition plug for igniting a combustion gas supplied into the combustion chamber. In the housing is defined a lithium ion battery accommodating part for causing the ignition plug to generate ignition energy. The housing includes a handle part. The lithium ion battery accommodating part is arranged at the free end of the handle part. | 12-18-2008 |
20080314951 | Gas Combustion Type Striking Tool - In a gas combustion type striking tool which strikes a fastener supplied in a nose portion into a member to be fastened by burning mixed gas inside a combustion chamber above a striking cylinder in accordance with a pulling operation of a trigger lever to drive a striking piston and a driver by a pressure of the combustion gas thus generated, a topper is disposed so as to be able to protrude into a path of a feed pawl or a feed piston, and a stopper engaging member, which extends downward from the striking cylinder and is movable in a vertical direction, engages with the stopper when the stopper engaging member moves downward, thereby retracting the stopper from the path. | 12-25-2008 |
20080314952 | Driving Piston Maintaining Structure in Gas Nailer - A gas nailer is provided with a driving cylinder | 12-25-2008 |
20090001119 | Power Drive Nailing Machine - A nailing machine includes a contact rod substantially in a straight shape and an operating dial. The contact rod is slidably and rotatably supported by a nose portion. The operating dial is slidably penetrated to be inserted by the contact rod, rotatably provided integrally with the contact rod and provided rotatably and by being restricted from being moved in an up and down direction with respect to the nose portion. A length of projecting the contact member in a direction of a front end of the nose portion is adjusted by rotating the contact rod by way of the operating dial. | 01-01-2009 |
20090001120 | ENHANCED FUEL PASSAGEWAY AND ADAPTER FOR COMBUSTION TOOL FUEL CELL - A combustion nailer is configured for use with a fuel cell having an internal metering valve and a reciprocating, biased main stem. The nailer includes a tool housing defining a fuel cell chamber constructed and arranged for receiving the fuel cell, a fuel cell actuator assembly configured for actuating the fuel cell in the chamber to emit a measured dose of fuel during tool operation, and a fuel delivery apparatus associated with the actuator assembly for receiving the emitted dose of fuel and providing it to a combustion chamber. The fuel delivery apparatus is configured for preventing actuation of the main stem by the actuator assembly upon the fuel cell being adapter-free. | 01-01-2009 |
20090008423 | COMBUSTION TYPE DRIVING TOOL - A combustion type driving tool including a combustion chamber frame which is provided in a housing, and can move in one direction and in the other direction thereby to define a combustion chamber when it has moved in the other direction, moving means which can select either of a manual operation valid state and a manual operation invalid state, and permits the combustion chamber frame to move in the other direction by manual operation, only in the manual operation valid state, and a link mechanism. The link mechanism has a connection part | 01-08-2009 |
20090032563 | Gas combustion type striking machine - A containing portion | 02-05-2009 |
20090032564 | Gas combustion type striking tool - A front portion of a feed cylinder of a feed piston-cylinder mechanism is communicated with a combustion chamber, and a rear portion of the feed cylinder is sealed. A check valve and a spring which constantly biases a feed piston toward a nail feed direction in the forward direction are provided. An opening valve communicating with the rear portion of the feed cylinder is provided. The opening valve is opened after or just before a completion of a returning operation of a striking piston. | 02-05-2009 |
20090057365 | Gas Combustion type driving tool - In a gas combustion type driving tool, on a feed cylinder | 03-05-2009 |
20090071999 | GAS COMBUSTION TYPE DRIVING TOOL - By moving a movable sleeve | 03-19-2009 |
20090090759 | FASTENER DRIVING TOOL USING A GAS SPRING - A portable linear fastener driving tool is provided that drive staples, nails, or other linearly driven fasteners. The tool uses a gas spring principle, in which a cylinder filled with compressed gas is used to quickly force a piston through a driving stroke movement, while a driver also drives a fastener into a workpiece. The piston/driver is then moved back to its starting position by use of a rotary-to-linear lifter, and the piston again compresses the gas above the piston, thereby preparing the tool for another driving stroke. The driver has protrusions along its edges that contact the lifter, which lifts the driver during a return stroke. A pivotable latch is controlled to move into either an interfering position or a non-interfering position with respect to the driver protrusions, and acts as a safety device, by preventing the driver from making a full driving stroke at an improper time. | 04-09-2009 |
20090090760 | Combustion Type Power Tool - A combustion type power tool capable of avoiding wasteful injection of combustible gas from a gas canister even if an unintentional operation of the push lever takes place, and capable of avoiding wasteful electric power consumption even if a battery used as power supply remains set in the tool. While the tool is not being used, a stop unit is set at a stop position, preventing a gas canister from injecting gas, and while the tool is being used, the stop unit is set at a release position, allowing the gas canister to inject gas as a result of movement of a combustion chamber frame. | 04-09-2009 |
20090188962 | Combustion-operated setting tool - A combustion-operated setting tool ( | 07-30-2009 |
20090206121 | Power adjustable fastener propelling tool - There is provided a fastening tool including a tool body and a combustion housing defining a combustion chamber. A barrel is connected to the combustion housing and includes a barrel opening configured to receive a fastener. The tool also includes a power source configured to generate a power source signal. A power regulator is in electrical communication with the power source and is configured to receive the power source signal and transmit a power regulator output having an output magnitude. A manual power control is in operative communication with the power regulator and is configured to adjust the power regulator output magnitude. A spark generator is in electrical communication with the power regulator and is configured to generate a spark within the combustion chamber upon receipt of the power output from the power regulator. The spark includes a spark magnitude that varies in response to the power output magnitude. | 08-20-2009 |
20090250499 | Combustion-engined setting tool - A combustion-engined setting tool ( | 10-08-2009 |
20090294506 | Setting tool - A setting tool for driving fastening element in constructional components includes a setting mechanism having a combustion chamber ( | 12-03-2009 |
20100108736 | GAS INTERNAL COMBUSTION TYPE NAILING MACHINE - The present gas internal combustion type nailing machine is provided with: a striking cylinder for slidably accommodating a striking piston therein; a combustion chamber formed in an upper side and capable of being opened and closed; a compressor for supercharging compressed air into the combustion chamber; a fuel supply device for supplying a fuel gas into the combustion chamber; and a safety device for preventing the nailing machine from being driven for ignition when the supercharge pressure of the compressed air exceeds a set pressure value. | 05-06-2010 |
20100176177 | GAS COMBUSTION TYPE STRIKING TOOL - When a movable sleeve | 07-15-2010 |
20100187280 | COMBUSTION-TYPE POWER TOOL - A combustion-type power tool includes a housing, a cylinder head, a cylinder, a push lever, a piston, a combustion-chamber frame, and an urging member. The cylinder head is disposed at a first end of the housing. The cylinder is disposed in and fixed to the housing. The cylinder has an inner space. The push lever is disposed at a second end of the housing. The piston is slidably disposed in the cylinder and is reciprocally movable in an axial direction. The combustion-chamber frame is disposed in the housing and provides a combustion chamber in cooperation with the cylinder head and the piston. The urging member has one end attached to the piston and another end attached to an axial end of the cylinder, thereby urging the piston in a direction from the second end toward the first end. | 07-29-2010 |
20100193561 | GAS COMBUSTION TYPE DRIVING TOOL - A cylinder head | 08-05-2010 |
20100237127 | OSCILLATION REDUCING SUSPENSION DEVICE FOR A FAN MOTOR OF A COMBUSTION-POWERED TOOL - An oscillation reducing suspension device for a fan motor of a combustion-powered tool includes a rigid axial-play setting unit mounted on an upper major surface of a cylinder head, and having upper and lower limit defining members that are spaced apart from each other by an axial play route, a suspending mount configured to keep the fan motor oriented in a rotary axis, and having a lug which extends radially into the axial play route to divide the axial play route into proximate and distal regions, and an elastomeric damper unit having upper and lower damping members respectively disposed in the distal and proximate regions. By virtue of the rigid mount supporting the fan motor, and the resilient damper unit coupling the mount and the cylinder head, the fan motor is firmly secured to the cylinder head, and axial oscillation of the fan motor is reduced. | 09-23-2010 |
20100243700 | GAS COMBUSTION-TYPE DRIVING TOOL - A driving piston | 09-30-2010 |
20100258609 | POWDER-ACTUATED FASTENER-DRIVING DEVICE CAPABLE OF POWER ADJUSTMENT - A powder-actuated fastener-driving device includes a barrel mounted in a housing. The barrel has a barrel wall formed with a through hole communicating with a radial vent hole. The through hole and the vent hole constitute an exhaust passage. A driving piston is mounted movably within the barrel, and has a rear end portion cooperating with an inner annular surface of the barrel wall to define an annular gap therebetween. A power adjusting unit includes an adjusting member disposed movably in the housing, and operable to move a control end portion thereof within the through hole so as to control an effective open area of the exhaust passage such that combustion gases discharge from a firing chamber defined between the driving piston and a rear end portion of the barrel through the gap and the effective open area, thereby controlling venting of combustion gases from the firing chamber. | 10-14-2010 |
20100270352 | Fastener Actuation System - A fastener actuation system for driving fasteners into a work surface separated a significant distance from a user, the system comprising a fastener actuation tool coupled to a pole assembly, the assembly including a lockout mechanism. The tool may have a firing pin assembly configured such that depression of the barrel assembly against the work surface loads a firing pin into a ready-to-fire position. In addition, the tool may have a trigger sleeve slidable within the tool housing and having a ramp surface such that forward motion of the trigger sleeve may cause a trigger sear to move along the ramp surface until a point where the sear disengages and the firing pin fires. Moreover, the trigger sleeve may operationally engage an advance lever for automatically engaging cartridges. Additionally, the tool system may comprise a pole assembly having a secondary mechanism such as an external sleeve for firing the tool. | 10-28-2010 |
20110006097 | FASTENER DRIVING TOOL - An explosively actuated fastener driving tool of the type having a driving piston for driving a fastener at the forward end of a barrel upon firing of the tool has a retractor pawl assembly with a pawl for resetting the piston into a rear end of the barrel by forward movement of the barrel relative to the receiver following firing. The pawl assembly is so constructed that the pawl can be withdrawn from the barrel to permit removal of the barrel for routine cleaning and maintenance but in this condition the assembly still remains attached to the tool to prevent components from being misplaced. | 01-13-2011 |
20110068142 | TOOL FOR DRIVING FASTENERS - A hand-held power tool powered by a gas combustion mechanism comprising a first combustion chamber, a second chamber within a driving cylinder having aft and fore ends. The first combustion chamber in fluid communication with the second chamber via the aft end, a fan assembly, a driver assembly having a piston and driver movable therewithin between the aft and fore end, and a drive motor operably connected to the driver assembly. In use, whilst the piston is at or near the fore end of the driving cylinder, the fan assembly introduces air into the chambers thereby at least partially pressuring the air there within, fuel gas is introduced into the combustion chamber to form an air/fuel gas mixture therein, the drive motor operably moves the piston to a position at or near the aft end thereby compressing the air/fuel gas mixture within the combustion chamber so that the air/fuel mixture is ignited to impart motion onto the and to facilitate the operation of the tool. | 03-24-2011 |
20110073631 | COMBUSTION POWERED DRIVER - A device for driving various objects using combustible fuel. Embodiments are contemplated in which the driver could be a post-driver, a power shovel, a jack-hammer or other devices. | 03-31-2011 |
20110139848 | FASTENING TOOL WITH AN INTERNAL COMBUSTION ENGINE WITH A UNIQUE OPENING AND CLOSING CHAMBER ABUTMENT - The tool is to be used for driving fastening members into a supporting material. It comprises a cylinder ( | 06-16-2011 |
20110139849 | FASTENING TOOL WITH DEPTH OF DRIVE ADJUSTMENT - The tool comprises an engine for propelling a piston including a shaft for driving a fastening member into a supporting material and through a pin guide, with means for adjusting the depth of drive of the piston shaft outside the pin guide at the end of the propulsion and at the stop of the piston in abutment against stop means. The pin guide is mounted free in translation and the depth of drive adjusting means comprise an adjustment knurl with a knurl shaft arranged so as to be in abutment against the pin guide and to push the pin guide forwards under the rotation action of the knurl. | 06-16-2011 |
20110315737 | ACTUATION SYSTEM - A device includes an actuation system with a dose chamber including an inlet for high pressure fluid. A working chamber extends away from the dose chamber. An annular wall separates a portion of the working chamber from the dose chamber such that the dose chamber encompasses the portion of the working chamber. In use an item to be driven along the working chamber is at least partially within the surrounded portion of the working chamber with the item at one end of its travel in the working chamber. A valve mechanism selectively allows high pressure fluid from the dose chamber to flow into the piston chamber. | 12-29-2011 |
20120000961 | Combustion Nailing Tool - A combustion nailing tool includes a tool body, a one-way valve, a cover disposed on the one-way valve, and a housing including a housing body and a cap. The tool body includes a combustion cylinder formed with an exhaust vent. The one-way valve is disposed on the combustion cylinder to cover an outer side of the exhaust vent, and is configured to allow exhaust gas resulting from ignition in the combustion cylinder to be vented through the exhaust vent. The cover has an open end allowing the exhaust gas to flow therethrough. The housing body defines an accommodating space for containing the combustion cylinder, and an opening in flow communication with the accommodating space and registered with the cover. The cap is mounted removably on the housing body and covers a part of the opening to thereby allow the exhaust gas to flow out of the housing. | 01-05-2012 |
20120037683 | POWDER-ACTUATED FASTENER-DRIVING DEVICE HAVING SOUND-ABSORBING FUNCTION - A powder-actuated fastener-driving device includes a hollow body including a tubular portion and a handle, and an inner tube movable forwardly and rearwardly within the tubular portion and having a front end disposed outwardly of the tubular portion, and a slot. The front end of the inner tube has an outer surface formed with a position-limiting groove. A stop member is disposed within the tubular portion, and extends into the slot. A sound-absorbing sleeve is sleeved movably on a portion of the tubular portion disposed outwardly of the handle, and has an inner surface formed with a position-limiting block, which is movable forwardly and rearwardly within the position-limiting groove. When the front end of the inner tube is pressed forwardly against an object, the sound-absorbing sleeve comes into contact with the handle. | 02-16-2012 |
20120061442 | GAS-COMBUSTION COILED STRIP NAIL DRIVING DEVICE - The present invention discloses a gas-combustion coiled strip nail driving device including a housing and a nose assembly. The housing mounts therein a cylinder head, a movable sleeve, a cylinder block, and a piston assembly arranged inside the cylinder block. The cylinder head, the movable sleeve, and the cylinder block collectively define a combustion chamber. The nose assembly includes a feeding mechanism that includes a secondary cylinder. An exhaust passage is formed in the cylinder head and communicates the combustion chamber. The housing has an outside surface on which a guide tube is mounted in such a way that the guide tube vertically extends along the housing. The guide tube has an S shape terminal end in communication with the exhaust passage, and a curve that is bent in a direction toward the housing. The guide tube has an opposite end in communication with the secondary cylinder. | 03-15-2012 |
20120067935 | PNEUMATIC NAILING MACHINE WITH A WINDING AIR CHANNEL FOR EXHAUST - A pneumatic nailing machine includes a striking cylinder accommodated in a main housing to permit a piston and driver assembly to be moved for driving a nail when compressed air is supplied into the cylinder. A valve member is movable relative to the cylinder between an air-supplying position and an air-exhausting position. A winding air channel has an intake port disposed downstream of a head valve zone, an outflow port angularly displaced from the intake port, and a channel body which extends radially from the intake port, axially into a mounting shell mounted on the main housing, and circumferentially toward the outflow port. Compressed air exhausted from the cylinder can expand in the air channel and the flow rate of the compressed air is reduced so as to efficiently attenuate noise. | 03-22-2012 |
20120132687 | FASTENER DRIVING TOOL - The invention relates to a fastener driving tool comprising a tank ( | 05-31-2012 |
20120132688 | FASTENER DRIVING TOOL - The invention relates to a fastener driving tool comprising a tank ( | 05-31-2012 |
20120132689 | FASTENER DRIVING TOOL - The invention relates to a fastener driving tool comprising a tank ( | 05-31-2012 |
20120132690 | FASTENER DRIVING TOOL - The invention relates to a fastener driving tool comprising a tank ( | 05-31-2012 |
20120132691 | FASTENER DRIVING TOOL - The invention relates to a fastener driving tool comprising a tank ( | 05-31-2012 |
20120145763 | FASTENER-DRIVING APPARATUS - The invention concerns a driving apparatus comprising a tank ( | 06-14-2012 |
20120153002 | FASTENER DRIVING TOOL AND METHOD FOR OPERATING A FASTENER DRIVING TOOL - A fastener driving tool and method for driving fasteners into a substrate is disclosed. The tool includes a working piston that is capable of being moved abruptly translationally by igniting an ignitable mixture in a combustion chamber so as to drive a fastener, such as a stud or a nail. The volume of the combustion chamber is adjustable. In order to further improve the operation and/or energy efficiency of the fastener driving tool, the fastener driving tool also includes a control device which is connected in a control relationship to an adjusting device for adjusting the combustion chamber volume and to a metering valve device for metering fuel gas. | 06-21-2012 |
20120153003 | FASTENER DRIVING TOOL AND METHOD FOR OPERATING A FASTENER DRIVING TOOL - A fastener driving tool and method for driving fasteners into a substrate is disclosed. The tool includes a working piston that is capable of being moved abruptly translationally so as to drive a fastener, such as a stud or a nail. In order to further improve the handling and/or energy efficiency during operation of a fastener driving tool, the fastener driving tool includes an operating device that enables switching between a manual and an automatic output-power regulating mode. | 06-21-2012 |
20120205420 | COMBUSTION-TYPE DRIVE APPARATUS - Embodiments of the present invention may include a combustion-type drive apparatus comprising a drive mechanism and an illumination device. The drive mechanism is configured to generate a drive force through combustion of a gas. The drive force is utilized to drive-in a member. The illumination device comprises a lighting portion configured to illuminate a place where the member is being driven in. | 08-16-2012 |
20120312857 | FASTENER DRIVING APPARATUS - The invention concerns a fastener driving apparatus comprising a tank for storage of a fuel, particularly liquefied gas, a combustion chamber ( | 12-13-2012 |
20130037593 | FASTENER FEEDER DELAY FOR FASTENER DRIVING TOOL - A fastener driving tool includes a power source including a cylinder, a piston with a driver blade reciprocating in the cylinder, a tool nose associated with the power source for receiving the driver blade for driving fasteners fed into the nose, and a magazine housing a supply of the fasteners. A magazine feeder mechanism is associated with the magazine for sequentially feeding fasteners into the nose, and the feeder mechanism includes a reciprocating feed piston. A conduit is connected between a port in the cylinder and the feed mechanism for diverting combusted gas for activating the feed piston. The port is disposed in the cylinder a specified distance below a piston prefiring position, the distance being reflective of a delay of activating the feed piston until the drive piston finishes a driving stroke and begins a return to the prefiring position. | 02-14-2013 |
20130270320 | DRIVING TOOL - The invention relates to a driving tool comprising a tank for storing a fuel, a combustion chamber connected to the tank, a movable piston for driving a driving ram, and a ventilator that acts on the combustion chamber and rotates around an axis, with several blades extending radially to the axis, wherein
| 10-17-2013 |
20140197221 | Nailer - A nailer includes a housing, a handle connecting the housing, a combustion chamber and a cylinder inside the housing, a piston whose rear end is inside the cylinder, a cage covering the exterior front end of the cylinder with the front end abutting on that of the cylinder, and a pin guide component that separately connects the nailer and further includes a nose piece, a guide sleeve whose lower end links the pin guide, an adjusting threaded rod whose front end connects the upper end of the guide sleeve and rear end links the upper end of the rear sleeve, a knob, a rear sleeve inserted into the adjusting threaded rod and fixed between the upper end of the guide sleeve and that of the rear sleeve, and a piston guide. The nailer boasts capability of pin guide replacement, quick troubleshooting and regulation of the nail driving depth. | 07-17-2014 |
20140299646 | HAND HELD POWER TOOL FOR DRIVING FASTENERS - A hand-held power tool powered by a gas combustion mechanism comprising a combustion chamber, a second chamber within a cylinder having aft and fore ends. The combustion chamber in fluid communication with the second chamber, and a first supercharger including a driver assembly, a drive motor and a fan assembly, the driver assembly having a piston and driver movable within the cylinder between said aft and fore ends. In use, whilst the piston is at or near the fore end of the cylinder, the fan assembly introduces air into the combustion chamber and the second chamber thereby pressuring the air there within, and fuel gas is introduced into the combustion chamber from a first supply port, the air and fuel gas becoming an air/fuel gas mixture therein. The drive motor moves the piston to a position at or near the aft end thereby compressing the air/fuel gas mixture within the first combustion chamber so that it is ignites within the combustion chamber to impart motion onto the piston. A second supercharger is connected to the combustion chamber for supplying a fuel gas and air mixture from a second supply port. | 10-09-2014 |
20140346213 | BALANCED GAS FASTENING TOOL - The tool comprises an inner combustion engine, in a housing, for propelling a piston for driving a fastening member, a casing for receiving a fuel cell as a source of energy of the engine, a handle for handling the tool, with a trigger for actuating the tool and a casing for receiving a battery as the electrical supply source of the tool, the handle being connected to the housing of the engine, and extending substantially perpendicular to an axis of the housing. On the side opposed to the housing of the engine, the handle is connected to an arm for receiving the fuel cell and the electrical supply battery. | 11-27-2014 |
20150102084 | POWERED NAILER WITH POSITIVE PISTON RETURN - A powered nailer includes a power source including a driving element reciprocating within a cylinder between a prefiring position and a fastener driving position, the latter occurring when the driving element engages a bumper disposed at the bottom of the cylinder. A reciprocating valve element defines a combustion chamber in fluid communication with the cylinder, and is configured for receiving a dose of fuel and air prior to a user-generated ignition. A return chamber at least partially surrounds the cylinder and is in fluid communication with the cylinder, being configured for receiving a supply of pressurized air generated by the driving element as it moves from the prefiring position to the fastener driving position, the pressurized air acting on an underside of the driving element for returning it to the pre-firing position. | 04-16-2015 |
20150136826 | COMBUSTION DRIVEN FASTENER SETTING DEVICE - A fastener setting device for setting fastening elements has a combustion chamber for burning a fuel to produce combustion gases, and includes driving piston guided on an inner surface of a tubular piston guide. The driving piston is driven by the combustion gases in the combustion chamber and in the piston guide. The piston guide is formed from a metal strip curved to form a tube, the two facing longitudinal edges of which are connected by a seam and/or positively interlocking portions. | 05-21-2015 |
20160059398 | VACUUM PISTON RETENTION FOR A COMBUSTION DRIVEN FASTENER HAND TOOL - A combustion driven fastener hand tool is disclosed having a piston driven by combustion within a chamber, the piston affixed to a driver for forcing a fastener. The piston forms a retention chamber having a lower internal pressure (“vacuum”) than that of the surrounding combustion chamber when the piston is disposed in the starting position for operation of the device. The lower internal pressure of the retention chamber (generated from a previous combustion cycle) momentarily holds the piston in place such that combustion behind the piston must first increase sufficiently to overcome holding force of the retention chamber before the piston moves. Requiring build up of combustion chamber pressure before piston motion greatly improves efficiency and power of the device. Use of the vacuum retention chamber is readily tunable with proper sizing of the chamber. | 03-03-2016 |
20160059399 | COMBUSTION DRIVEN FASTENER HAND TOOL - A combustion driven fastener hand tool is disclosed having an extruded front body component including two to three parallel bores. A first bore forms a cylinder for the piston which drives the fastener. A second bore forms a primary combustion chamber in which a fuel and air mixture is ignited and directed into the adjacent piston cylinder. A third bore (or alternately an attached component) forms a pathway for the fuel and air mixture to be directed into the primary combustion chamber. The combustion driven fastener hand tool includes numerous other features affording improvements over the prior art. | 03-03-2016 |