Abstract: A multi-function valve device for controlling the operation of a pneumatically-driven motor. A spring-biased linkage couples a cam-operated push pin to a valve spool assembly. The valve spool assembly coaxially combines the movable elements of a pressure regulator valve, a run valve, and a park valve into a single unit slidable axially within the valve housing and positioned by the spring-biased linkage. The pressure regulator valve permits an increasing pressure to be applied to a slowed or stopped pneumatic motor, approaching the pressure of the pneumatic source to aid in restarting the motor or to provide the additional force necessary to drive a heavily loaded motor. Automatic park and shutoff functions are also provided.

Abstract: A conductive member of plate form is supported on a spring biased member into a static postion of contact at a first corner with a support surface and at a second adjacent corner with a first contact member. A load applying member makes contact with the conductive member on the side thereof opposite from the spring biased support. A low rising pressure acting through the load applying member swings the conductive member in position about a first axis defined by its locations of contact with the support surface and the first contact member into a position in which it also contacts a second contact member and completes a conductive path between the two contact members. An intermediate rising pressure signal causes the conductive member to swing in position about a second axis defined by its locations of contact with the two contact members and against the operator of a micro-switch.

Abstract: A pin shear for shaping and cutting bone pins and other elongate elements to the desired length is described. A pneumatically operated, coaxial cutter assembly includes a cutter plug having pin passageways therethrough positioned inside a cutter body having an aperture therein located in registry with the passageway in a first position. The cutter plug is adapted to move within the cutter body to a second position out of registry with the aperture, whereby an elongate element positioned in the passageway and aperture is severed. A pneumatic operator including means for multiplication of the force applied is described.