Robert Boschgmbh

Robert Bosch Tool Corporation

Credo Technology Corporation

Robert Bosch Power Tools Gmbh

Roberts Bosch Gmbh

Oberheim, Stephen C.

Stephen C Oberheim

Harald Krondorfer

David S Pozgay

John DeCicco

John B Freese

Adam S Thomas

Plamen V Marinov

Brady J Groth

Brian Hyuk Joon Chung

Illya Kovarik

Brian Haman

Ravi Voruganti

Jeurgen Wiker

Hector Ruiz

Plamen Marinov

A table saw includes a table that defines a saw blade slot and a first trunnion member defining a first axis point of a bevel pivot axis, wherein the first trunnion member supports a saw carriage. The table saw further includes a first mounting arrangement configured to fix the first trunnion member to the table in an engaged state of the first mounting arrangement, and a horizontal axis alignment arrangement configured, in a disengaged state of the first mounting arrangement, to inhibit lateral movement of the first trunnion member and to allow vertical movement of the first trunnion member.

Table saw with a bevel pivot axis alignment arrangement

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.

Table saw with positive locking mechanism

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.

Reciprocating tool with biasing snubber

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.

Articulating drill with integrated circuit board and method of operation

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.

Semi-active anti-vibration systems for handheld electrical power tools

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.

Impact absorption drive mechanism for a reciprocating tool

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.

Hinge connections and power miter saw with hinge linkage linear guide including such hinge connections

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.

Electronic orbit control for saws

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.

Table saw with mechanical fuse

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.

Linkage drive mechanism for a reciprocating tool

A power miter saw comprises a saw base having a fence for positioning a work piece, a table rotatably connected to the saw base; a miter arm assembly for angularly positioning the table relative to the saw base, a saw blade and motor assembly operatively connected to the table, a linear guide mechanism attached to the table and being configured to support the saw blade and motor assembly and enable movement of the assembly along a predetermined linear path in either forward or rearward directions, the mechanism having a horizontal shaft about which the assembly is pivotable to move a saw blade vertically into and out of cutting position, the mechanism also having a multiple link hinge pivotally interconnecting the motor assembly and the table with horizontal shafts that are parallel to one another.

Power miter saw with hinge linkage linear guides

A drive apparatus for a reciprocating tool includes a plunger and a wobble plate interface operatively connected to a drive shaft assembly. The wobble plate interface includes a lower portion having an effective lower pivot connection, and an upper pivot connection to a rear portion of the plunger. The wobble plate interface is 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 define 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.

Drive mechanism for a reciprocating tool

A drive apparatus for a reciprocating tool includes a housing, a rotatable drive shaft assembly located in the housing, and an elongated plunger located in the housing for a reciprocating motion. The plunger has a front end portion for attaching a cutting blade thereto. The drive apparatus also includes 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 is operatively connected to the drive shaft assembly, a lower portion having an effective lower pivot connection. The wobble plate interface also has 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.

Growing community of inventors

Des Plaines, IL, United States of America

Stephen C Oberheim