Abstract: A structure and method for improving yield during physical chip design comprises identifying non-critically timed minimum groundrule cells located within the chip design, determining if whitespace exists around the non-critically timed minimum groundrule cells, and replacing the non-critically timed minimum groundrule cells that have the whitespace with non-minimum groundrule cells if the replacing leaves a functionality of the circuit unaltered.

Abstract: A reciprocating saw having a main body and a spindle mounted in the main body and movable between a retracted position and an extended position. The saw further includes a biasing member operatively associated with the spindle. The biasing member can include a spring that acts on an inner end of the spindle to bias the spindle toward either the extended position or the retracted position.

Abstract: A reciprocating saw having a main body, a reciprocating spindle extending from the main body, and a saw blade connected to the spindle and including a cutting edge for cutting the workpiece. A shoe is pivotally mounted relative to the main body at a pivot axis, and a shoe support extends from the main body to pivotally support the shoe at the pivot axis. The pivot axis is substantially adjacent to the cutting edge such that the pivot axis moves through the workpiece at substantially the same time as the cutting edge. The shoe support includes a post connected to and extending from the body, and a yoke connected to the post, the yoke including two leg portions pivotally connected to the shoe. The shoe is pivotally mounted at a pivot part that is recessed inwardly from a side guide surface. The shoe includes an indicator in alignment with the saw blade to facilitate alignment of the saw blade with a mark on the workpiece.

Abstract: A reciprocating saw including a housing, a spindle mounted for reciprocating motion within the housing, a gear rotatably mounted within the housing, a wobble shaft rotatably mounted within the housing, a wobble plate rotatably mounted on the wobble shaft and connected to the spindle, and a clutch drivingly connecting the gear to the wobble shaft. The clutch includes a clutch driver rotatably positioned within the housing adjacent the wobble shaft, and the clutch driver includes a recess for insertably receiving a portion of the wobble shaft. The clutch driver can also include a relief ledge for providing clearance between the clutch driver and the wobble plate. The clutch can further include a first clutch disk connected with the gear and positioned between the gear and the clutch driver, and a second clutch disk connected with the clutch driver and positioned between the gear and the first clutch disk.

Abstract: Disclosed herein is a reciprocating saw including a housing, a shaft rotatably mounted in the housing, a motor, a spindle reciprocally supported by the housing, a wobble plate mounted on the shaft and connected to the spindle and converting rotational motion to reciprocal motion, and a clutch drivingly connecting the motor to the shaft and providing slippage between the motor and the shaft if there is binding of the spindle.

Abstract: An inflatable flexible gland clutch has a gland secured to one of a pair of cooperating clutch elements. The gland mounts friction shoes and includes inflatable chambers which, when subjected to air under pressure, will move the gland to a position where the shoes engage the other clutch element. Other chambers formed in the gland will, when inflated, disengage the clutch by moving the clutch shoes away from engagement with the mating clutch element.

Abstract: A reciprocating saw including a housing, a spindle mounted for reciprocating motion within the housing, a gear rotatably mounted within the housing, a wobble shaft rotatably mounted within the housing, a wobble plate rotatably mounted on the wobble shaft and connected to the spindle, and a clutch drivingly connecting the gear to the wobble shaft. The clutch includes a clutch driver rotatably positioned within the housing adjacent the wobble shaft, and the clutch driver includes a recess for insertably receiving a portion of the wobble shaft. The clutch driver can also include a relief ledge for providing clearance between the clutch driver and the wobble plate. The clutch can further include a first clutch disk connected with the gear and positioned between the gear and the clutch driver, and a second clutch disk connected with the clutch driver and positioned between the gear and the first clutch disk.

Abstract: A reciprocating saw including a housing, a spindle mounted for reciprocating motion within the housing, a gear rotatably mounted within the housing, a wobble shaft rotatably mounted within the housing, a wobble plate rotatably mounted on the wobble shaft and connected to the spindle, and a clutch drivingly connecting the gear to the wobble shaft. The clutch includes a clutch driver rotatably positioned within the housing adjacent the wobble shaft, and the clutch driver includes a recess for insertably receiving a portion of the wobble shaft. The clutch driver can also include a relief ledge for providing clearance between the clutch driver and the wobble plate. The clutch can further include a first clutch disk connected with the gear and positioned between the gear and the clutch driver, and a second clutch disk connected with the clutch driver and positioned between the gear and the first clutch disk.