Abstract: The present invention is a safety braking system for a hand-pushed rollator, which allows the user to engage different operation modes: a park mode, a walk mode, and a brake mode. The present invention comprises a wheel mechanism, a cable assembly, and a handlebar mechanism. The wheel mechanism allows a wheel to rotate during walk mode, to engage the wheel with a parking brake during park mode, and to engage the wheel with a friction brake during brake mode. The wheel mechanism pivots the parking brake and the friction brake on a lever in order to switch between the different operation modes. The handlebar mechanism allows the user to shift between the different operation modes and is engaged to the wheel mechanism through the cable assembly. The handlebar mechanism uses two levers that are pushed and pulled by the user in order to shift between the different operation modes.

Abstract: The present invention is a safety braking system for a hand-pushed rollator, which allows the user to engage different operation modes: a park mode, a walk mode, and a brake mode. The present invention comprises a wheel mechanism, a cable assembly, and a handlebar mechanism. The wheel mechanism allows a wheel to rotate during walk mode, to engage the wheel with a parking brake during park mode, and to engage the wheel with a friction brake during brake mode. The wheel mechanism pivots the parking brake and the friction brake on a lever in order to switch between the different operation modes. The handlebar mechanism allows the user to shift between the different operation modes and is engaged to the wheel mechanism through the cable assembly. The handlebar mechanism uses two levers that are pushed and pulled by the user in order to shift between the different operation modes.

Abstract: An annular actuator for moving a member axially to couple and un couple a drive member with a driven member of a vehicle drive train. The actuator encircles the drive and driven member. The actuator has a housing to which a diaphragm is mounted. A spring biases the diaphragm to move in one axial direction and withdrawal of air forces the diaphragm to move in the opposite axial direction. A shifting fork coupled to the diaphragm moves a clutch ring in the one axial direction to be coupled with only one of the drive and driven members and is coupled with both the drive and driven members when moved in the opposite direction. The actuator defines a sealed chamber that is totally non-rotatable with relative movement occurring between the shifting fork and the clutch ring.

Abstract: A bi-directional overrunning pawl-type clutch having a driving member mounted for power rotation, a driven member mounted for rotation adjacent the driving member, with each of the driving and driven members having pawl engaging shoulders, and a plurality of rigid pawls interposed between the driving and driven members. A control element is mounted for shifting movement between the driving and driven members to control the position of the pawls which are yieldably biased toward positions of engagement extending between the driving and driven members to produce driving engagement therebetween. The control element is shiftable to various positions to permit driving and overrunning in one direction or driving and overrunning in the opposite direction dependent upon the direction of rotation of the driving member.

Abstract: A spindle nut and a locking device are disclosed for securing the nut on a spindle in a non-rotative position relative to the spindle. The assembly comprises the spindle nut, an antirotation spring and a spring backup plate mounted on the spindle. The antirotation spring and spring backup plate may be formed as a single unit.

Abstract: A spindle nut and a locking device for securing the nut in a rotative position on a spindle. An anti-rotation spring and a back up plate are mounted on the spindle in a non-rotative manner with the back up plate in abutment with the bearings that rotatively mount the hub to the spindle. The back up plate has multiple grooves aligned with and arranged to receive multiple resilient tabs on the periphery of the anti-rotation spring. The tabs of the anti-rotation spring are formed to project axially from the spring. A flange of the nut has multiple slots around its periphery that are sized to receive a tab of the anti-rotation spring. A tool having extending ears that fit in the slots of the nut is utilized to install the nut on the spindle. The extending ears prevent the tabs of the spring from entering a slot of the nut until the tool is removed. As the nut is rotated by the tool, the nut abuts the anti-rotation spring.

Abstract: A Stirling engine adapted to automotive propulsion is disclosed using an improved preheater construction in the external heating circuit. The preheater construction is comprised of a concentric toroid placed about the heater tube array, the inner cylindrical wall of the ring serving as a wall to define the heating chamber for the closed working fluid circuit. The concentric ring is totally ceramic with alternating orientation of finned ceramic walls fused together to define a cross-flow matrix. Static seal rings of woven ceramic material encased in folded metal foil are retained along the annular edges of at least the upper and lower faces of the concentric toroid to facilitate cross-flow fluid connections.

Abstract: A Stirling engine adapted for automotive propulsion is disclosed using an improved preheater construction in the external heating circuit.The preheater construction is comprised of discrete cubicle modules arranged annularly about the engine burner with their inner faces in contiguous edge contact to define a close cylindrical space. The modules are totally ceramic with alternating orientation of finned ceramic wall fused together to define a cross-flow matrix. Static seal strips of woven ceramic material encased in a folded metal foil strip are retained against all of the edges of each module to facilitate cross-flow fluid connections.