Patent application number | Description | Published |
20090188119 | LINKAGE DRIVE MECHANISM FOR A RECIPROCATING TOOL - Preferred embodiments of a reciprocating drive apparatus are disclosed that comprise a housing, a rotatable drive shaft assembly located in the housing an elongated plunger located in the housing for reciprocating motion, the plunger having a front end portion for attaching a tool thereto, a rotary joint rocker mechanism supported in the housing and operatively connected to the plunger and the drive shaft assembly so that rotation of the drive shaft assembly produces reciprocating motion of the plunger. Another preferred embodiment includes a reciprocating counterweight. | 07-30-2009 |
20100101101 | PROGRESSIVE FORCE CUT PATH DRIVE MECHANISM FOR A RECIPROCATING TOOL - Embodiments are disclosed of a drive apparatus for a reciprocating tool, that comprises a housing, a rotatable drive shaft assembly located in the housing, an elongated plunger located in the housing for reciprocating motion, the plunger having a front end portion for attaching a cutting blade thereto, a rotary joint elongated rocker having a lower end portion with a lower pivot connection to the housing and an upper end with an upper pivot connection to a mid portion of the plunger, a wobble plate interface operatively connected to the drive shaft assembly, a lower portion having an effective lower pivot connection, the interface also having an upper pivot connection to a rear portion of the plunger and configured to reciprocate the plunger generally in its lengthwise direction during alternating cutting and return strokes, the distances between the upper and lower pivot connections of both the rocker and wobble plate interface together with the distance between the upper pivot connections thereof to the plunger defining a four bar mechanism that produces a path of movement of an attached cutting blade that is effective to apply a progressive non-linear cutting force to a workpiece during the cutting stroke. | 04-29-2010 |
20100126027 | IMPACT ABSORPTION DRIVE MECHANISM FOR A RECIPROCATING TOOL - Embodiments are disclosed for a reciprocating saw that comprises a housing, a drive mechanism in the housing, a motor in the housing for driving the drive mechanism, an elongated plunger located in the housing for reciprocating motion and having a front end portion for attaching a saw blade for cutting material, the saw having an energy absorbing compliant configuration at least partially isolating a portion of the plunger and the drive mechanism from high energy impulses that can be produced by the saw blade being bound in the material being sawed during operation of the saw. | 05-27-2010 |
20100126028 | DRIVE MECHANISM FOR A RECIPROCATING TOOL - Embodiments are disclosed of a drive apparatus for a reciprocating tool, that comprises a housing, a rotatable drive shaft assembly located in the housing, an elongated plunger located in the housing for reciprocating motion, the plunger having a front end portion for attaching a cutting blade thereto, a rotary joint elongated rocker having a lower end portion with a lower pivot connection to the housing and an upper end with an upper pivot connection to a mid portion of the plunger, a wobble plate interface operatively connected to the drive shaft assembly, a lower portion having an effective lower pivot connection, the interface also having an upper pivot connection to a rear portion of the plunger and configured to reciprocate the plunger generally in its lengthwise direction during alternating cutting and return strokes, the distances between the upper and lower pivot connections of both the rocker and wobble plate interface together with the distance between the upper pivot connections thereof to the plunger defining a four bar mechanism that produces a path of movement of an attached cutting blade that is effective to apply a progressive non-linear cutting force to a work piece during the cutting stroke. | 05-27-2010 |
20110043153 | ELECTRONIC ORBIT CONTROL FOR SAWS - A power saw having a reciprocating blade, including a housing having a handle portion for holding the saw; a variable speed motor in the housing for driving the reciprocating blade; a mechanism configured to move the reciprocating blade in a non-linear path; an electronic controller for controlling the operation of the motor; a trigger switch configured to provide an electrical signal to the controller that is proportional to the amount of travel that the switch is moved, wherein the signal causes the controller to operate the motor through a range of operating speeds; and a mode switch operatively connected to the controller and including a first mode providing normal operating speeds responsive to the trigger switch being selectively moved through its range of travel, and a second mode wherein the operating speeds are within the range of about 50% to about 80% of the normal operating speeds. | 02-24-2011 |
20110048189 | TABLE SAW WITH POSITIVE LOCKING MECHANISM - A power tool in one embodiment includes a work-piece support surface, a swing arm assembly movable along a swing path between a first swing arm position whereat a portion of a shaping device supported by the swing arm assembly extends above the work-piece support surface and a second swing arm position whereat the portion of the shaping device does not extend above the work-piece support surface, a latch pin pivotable between a first position engaged with the swing arm assembly and a second position whereat the latch is not engaged with the swing arm assembly, an actuator configured to pivot the latch pin from the first position to the second position and to force the swing arm assembly away from the first swing arm position and toward the second swing arm position, and a control system configured to actuate the actuator in response to a sensed condition. | 03-03-2011 |
20110048192 | TABLE SAW WITH MECHANICAL FUSE - A power tool in one embodiment includes a work-piece support surface, a swing arm assembly movable along a swing path between a first swing arm position whereat a portion of a shaping device supported by the swing arm assembly extends above the work-piece support surface and a second swing arm position whereat the portion of the shaping device does not extend above the work-piece support surface, a mechanical fuse positioned to maintain the swing arm assembly in the first swing arm position, an actuator configured to apply a force to the mechanical fuse sufficient to break the mechanical fuse and to force the swing arm assembly away from the first swing arm position and toward the second swing arm position, and a control system configured to actuate the actuator in response to a sensed condition. | 03-03-2011 |
20110061245 | SHOCK ABSORBING, VIBRATION ISOLATING AND JAM PROTECTING FOOT DEVICE FOR A RECIPROCATING SAW - Embodiments of a foot apparatus for use with a power reciprocating saw having a nose portion configured to receive the same, the apparatus comprising an elongated foot stem configured to be inserted into the nose portion of the saw a foot pad having a forward surface for contacting a work piece and having an opening through which a blade extends, a front housing having one end portion with a first pivot connection to the stem and an opposite end portion having a second pivot connection to the foot pad, a compliant element interposed between one of the foot pad and front housing and the stem configured to resist pivoting of the front housing relative to the stem and thereby isolate and dampen vibration and shock that is transmitted to the stem by reciprocating action of the plunger and by cutting of a work piece. | 03-17-2011 |
20120006169 | HINGE CONNECTIONS AND POWER MITER SAW WITH HINGE LINKAGE LINEAR GUIDE INCLUDING SUCH HINGE CONNECTIONS - A hinge connection between first and second links, including a shaft; a threaded aperture formed within an end portion of the shaft; and a pair of bearings. The hinge connection may optionally include a spacer surrounding the shaft. In addition, there is also a bushing surrounding the end portion of the shaft. A threaded fastening member is inserted into the threaded aperture of the shaft. Upon insertion and tightening of the threaded fastening member, any axial gap between the first bearing and the bushing is eliminated. Also disclosed is a hinge connection with a split shaft, including two cantilever shafts, where a main axial portion of each cantilever shaft is seated within a bore of the first link; and a pair of bearings, where an inner portion of each of the cantilever shafts is rotatably seated within one of the bearings. | 01-12-2012 |
20120325065 | Table Saw with Mechanical Fuse - A power tool in one embodiment includes a work-piece support surface, a swing arm assembly movable along a swing path between a first swing arm position whereat a portion of a shaping device supported by the swing arm assembly extends above the work-piece support surface and a second swing arm position whereat the portion of the shaping device does not extend above the work-piece support surface, a mechanical fuse positioned to maintain the swing arm assembly in the first swing arm position, an actuator configured to apply a force to the mechanical fuse sufficient to break the mechanical fuse and to force the swing arm assembly away from the first swing arm position and toward the second swing arm position, and a control system configured to actuate the actuator in response to a sensed condition. | 12-27-2012 |
20130056235 | Articulating Drill with Integrated Circuit Board and Method of Operation - The present invention is an articulating hand power tool with a main housing having a longitudinal axis, a head portion rotatably engaged with the main housing for placement at a plurality of angles with respect to the longitudinal axis of the main housing, an integrated circuit board located within the main housing and at least one controller accessible from outside of the main housing for controlling the integrated circuit board. | 03-07-2013 |
20130092408 | Semi-Active Anti-Vibration Systems for Handheld Electrical Power Tools - An improved vibration dampening system has been developed for handheld electrical power tools. The vibration dampening system includes a material that a controller selectively activates with an electrical current to increase the rigidity of the material and dampen random vibrations detected by the controller. The material is positioned between a foot member that helps support the tool against a work piece and both hand grips for the tool. Thus, the vibration dampening system reduces the impact of random vibrations on both hands of an operator. | 04-18-2013 |
20140048300 | Articulating Drill with Integrated Circuit Board and Method of Operation - The present invention is an articulating hand power tool with a main housing having a longitudinal axis, a head portion rotatably engaged with the main housing for placement at a plurality of angles with respect to the longitudinal axis of the main housing, an integrated circuit board located within the main housing and at least one controller accessible from outside of the main housing for controlling the integrated circuit board. | 02-20-2014 |
20140259701 | RECIPROCATING TOOL WITH BIASING SNUBBER - In one embodiment, a reciprocating tool includes a reciprocating plunger, a motor operably connected to the plunger, a cam portion operably connected to the motor, a cam follower operably connected to the reciprocating plunger, and a biasing assembly configured to bias the cam follower toward the cam portion, the biasing assembly including an outer biasing member and an inner biasing member, the inner biasing member in contact with an inner portion of the outer biasing member. | 09-18-2014 |
20140262402 | Power Hand Tool with Vibration Isolation - In one embodiment, a power hand tool includes a housing containing a working shaft, and a vibration isolation assembly, the vibration isolation assembly including at least one base member including a base portion fixed with respect to the housing, at least one vibration isolation portion including a first portion operably connected to the at least one base member, the at least one vibration isolation portion configured to isolate vibration in at least one direction, and a grip member having an outer surface configured to be gripped by a user and an inner surface operably connected to an outer portion of the at least one vibration isolation portion. | 09-18-2014 |