| Husqvarna Zenoah Co., Ltd. Patent applications |
| Patent application number | Title | Published |
|---|
| 20110000048 | ENGINE BLOWER - An engine blower includes: an engine integrated with a volute for driving a fan; a ventilation tube communicated with the volute; and a handle mounted to the ventilation tube. In the engine blower, the handle has a pair of cases that are assembled with each other, and a conductive resin layer is formed on a surface of a grip of the handle. The resin layer is integrated with gates exposed within the handle. A conductive spring having a coil compressed in a direction in which the cases are assembled with each other and a cable that is electrically coupled with the engine are disposed within the handle. The gate of the resin layer is brought into contact with the coil of the spring and is electrically coupled with the cable via the spring. | 01-06-2011 |
| 20100294249 | INSULATOR - An insulator is provided with an acceleration pump attachment on the lower side of an insulating section. An acceleration pump is attached to the acceleration pump attachment. A passage is provided on the lower side of the insulating section. A conduit is provided on a connecting surface which contacts an engine to intercommunicate between an insulator air passage and the passage. A connecting passage is provided on an upper portion of the acceleration pump to intercommunicate between the passage and a negative-pressure introducing chamber. Thus, the acceleration pump can be easily disposed in a space at the lower side of the insulator, which is conventionally a dead space. In addition, an outer pipe to intercommunicate between the insulator and the acceleration pump is not required, whereby space saving can be achieved and a structure of interconnection can be simplified. | 11-25-2010 |
| 20100293795 | BRUSH CUTTER - A brush cutter is provided with fixing pieces projecting outward and opposing each other substantially at a middle position of a slit stretching between both ends of a clamp member. Accordingly, an outer pipe is clamped in the middle of an attachment housing and apart from an axial center of the outer pipe, so that a size of the attachment housing in an axial direction can be reduced and stress concentration on the outer pipe can be avoided. | 11-25-2010 |
| 20100288251 | SCAVENGING COVER AND TWO-CYCLE ENGINE - Since a throttle hole for narrowing a scavenging passage is provided on a partition for closing the scavenging passage, the throttle hole of a desired size can be drilled at a desired location on the partition after preparing the scavenging cover having no throttle hole on the partition. Accordingly, the size and location of the throttle hole can be easily changed in conducting a test for finding the most appropriate size and location of the throttle hole, so that the most appropriate size and location of the throttle hole can be easily found. | 11-18-2010 |
| 20100186688 | ENGINE BLOWER - An engine blower includes a blower having a fan accommodated in a volute case, and an engine having a volute for generating a cooling air for self-cooling. An output shaft of the engine is provided with the fan without attaching a cooling fan for generating the cooling air. An outlet port for delivering a part of a blowing air generated by the fan is provided on the volute case. | 07-29-2010 |
| 20100163337 | MUFFLER - A muffler includes a muffler body in which a muffler chamber is formed by a base, a cover, and a baffle accommodated in the muffler chamber and disposed in the vicinity of the exhaust gas entry port of the muffler body. A guide portion which changes flow of an exhaust gas that enters from the exhaust gas entry port is integrally provided to the baffle by cut-and-raise of a portion of the baffle. | 07-01-2010 |
| 20100083512 | CHAIN SAW - A muffler includes a muffler body disposed on a lower portion of an engine and a passage that extends upward from the muffler body and is opened in an upper front portion of a chain saw body. Thus, exhaust gas can be discharged forward from the chain saw body, so that exhaust sounds can be dispersed forward. Consequently, the exhaust sounds propagated to an operator can be reduced and therefore a work environment can be improved. Also, since exhaust gas is discharged after the exhaust gas passes through a long passage extending upward from the muffler body, the exhaust gas can be cooled down. Accordingly, in the chain saw body typically covered with a synthetic-resin case in which exhaust outlets are formed on positions corresponding to outlets of the passage, peripheries of the exhaust outlets can be prevented from being discolored by heat of exhaust gas. | 04-08-2010 |
| 20100083511 | CHAIN SAW - A cooling fan includes: a hub; a plurality of cooling vanes provided along an outer circumference of the hub; and an annular connector for connecting the cooling vanes. The hub is provided with a through hole that axially penetrates the hub. A first cover on a case for covering an outward side of the cooling fan is provided with a first outer-air intake. A second cover for partitioning between the cooling fan and a crankcase and for covering an inward side of the cooling fan is provided with a second outer-air intake. With this arrangement, even when one outer-air intake (for instance, the first outer-air intake) adjacent to where the cooling vanes are provided is clogged by a large amount of dust generated during operations, the cooling vanes can breathe from the non-clogged other outer-air intake (for instance, the second outer-air intake) through the through hole, thereby restraining reduction in air flow. | 04-08-2010 |
| 20090235538 | Portable Work Machine - A chain saw as a portable work machine includes: a body in which an engine is accommodated; a carburetor accommodated in a top handle for generating air-fuel mixture to be supplied to the engine; an air cleaner provided on a lateral side of the body; and an intake communication passage that intercommunicates between the air cleaner and the carburetor. | 09-24-2009 |
| 20090191734 | CABLE TERMINAL AND CABLE USING THE SAME - A cable terminal includes: a crimped portion crimped to a cable body; an extending piece provided integrally with the crimped portion to extend forward in an insertion direction; and a conductor conducting piece provided integrally with the crimped portion to face an end face of the cable body. An end of the extending piece abuts on an inner surface of a plug cap made of an elastic body to determine a position in terms of the insertion direction. The extending piece is provided with a springy press piece that projects to a plug terminal of an ignition plug inserted into the plug cap and contacts an end face of the plug terminal. The conductor contacting piece is sandwiched between a portion of an outer circumference of the plug terminal and a core exposed from the end face of the cable body. The plug terminal is disposed to be in tight contact with the inner surface of the plug cap. | 07-30-2009 |
| 20090126147 | BLOWER DUCT - A portable-blower duct has a bendable portion whose inner peripheral surface is a cylindrical surface without any protrusions or recesses in a normal state or in an expanded state, that is, unless it is greatly curved. With this construction, no turbulence is generated in air passing through a tube, thereby making it possible to suppress pressure loss. Thus, the flow velocity of air guided through the duct is not reduced, thereby suppressing a deterioration in air blowing efficiency. Even when the tube is curved, the outer side of the curved portion is expanded, and the corresponding portion of the inner peripheral surface remains a smooth surface, thus making it possible to minimize the air pressure loss. | 05-21-2009 |
| 20090119934 | AUTO CHAIN TENSIONER - The invention relates to an auto tensioner of a chain saw. A spiral guide groove ( | 05-14-2009 |
| 20090100688 | Chainsaw - A chainsaw includes: a body case | 04-23-2009 |
| 20090095268 | TWO-CYCLE ENGINE - Through holes formed on an atomization pipe can prevent fuel adhering on inner walls of the through holes from escaping. In addition, when fuel adhering on an inner circumferential surface of the atomization pipe flows toward a downstream side, the fuel enters the through holes. Thus, the fuel can be confined therein Furthermore, an absorbing member can absorb the fuel that has adhered to a downstream inner wall of the atomization pipe and flows toward the downstream side. Moreover, a periphery of the intake passage hole of a gasket protrudes from the inner wall, so that flow of the fuel that the absorbing member fails to absorb toward the downstream side can be blocked. Accordingly, a rapid increase in the amount of fuel flowing into the engine body can be reliably prevented. Therefore, fluctuation in the number of revolutions of the engine can be sufficiently restrained. | 04-16-2009 |
| 20090084626 | Muffler and Working Machine - A muffler of a work machine in the form of an engine blower includes: a muffler body; and a diffuser that covers an exhaust outlet of exhaust gas provided on the muffler body. The diffuser has a diffusion space to diffuse the exhaust gas and an exhaust surface on which a plurality of exhaust circular holes are provided to exhaust the exhaust gas to an outside. An opening ratio provided by the exhaust holes of the exhaust surface is gradually increased from a portion corresponding to the exhaust opening toward an outer periphery of the exhaust surface. | 04-02-2009 |
| 20090020094 | ENGINE START DEVICE FOR MANUAL WORK MACHINE, HAVING SMALL-SIZED ELECTRIC MOTOR, AND MANUAL WORK MACHINE HAVING THE START DEVICE MOUNTED THEREON - The present invention relates to a start device for a small-sized engine, which is capable of starting the small-sized engine in an appropriate starting time and is ultimately reduced in size and weight by a rational design. A plurality of secondary batteries is used as a power source required to drive a small-sized electric motor and a small-sized engine, and has a considerably large capacity and an extremely small size. A speed reduction mechanism that has a reduction ratio of 1/30 to 1/90 is disposed between the electric motor and a buffer/power storage section. The start device starts the engine in an extremely short time of 0.4 to 1.3 seconds. Within this range of staring time of the engine, an operator has no uncomfortable feelings. | 01-22-2009 |
| 20090007439 | AUTO CHAIN TENSIONER - The invention relates to an auto tensioner of a chain saw. A spiral guide groove ( | 01-08-2009 |
| 20090007438 | Chain Saw - A chain saw includes a body in which an engine for driving a saw chain is laterally housed; a top handle provided above the body; and a muffler arranged below the engine, in which an exhaust outlet for discharging exhaust from the body side to the outside opens forward from the body side. Accordingly, not only the exhaust can be discharged forward from the side of the body, but also the exhaust sound can be propagated forward so that less exhaust sound is heard by the operator, thereby improving the work environment. | 01-08-2009 |
