Snap-on Inc.

Snap-on Technologies, Inc.

Snap-on Tools Corporation

Thomas J Diedrich

Anil P Ghode

Steven R Wente

Christopher W Chudek

Raymond D De Rome

A ratcheting assembly around which is coaxially coupled a ratchet head of the type having internal teeth, the latter imparting rotational movement to the ratcheting assembly. The ratchet assembly includes a drive body having recessed grooves for receiving pivotably mounted first and second elongated pawls. Each pawl includes teeth on opposite ends thereof for engagement with the teeth on the ratchet head. A reversing knob assembly is coupled to the drive body and includes a reversing knob and pins for pivotally rotating said pawls between first and second conditions. Pawl positioning pins coupled to the drive body operate to maintain the pawls with their longitudinal axes substantially parallel to each other so as to prevent them from jamming relative to the teeth on the ratchet head.

Dual-pawl ratcheting mechanism with provision for preventing pawl jamming

A rotary air motor has a liner disposed within a tool housing and having a cylindrical bore therethrough. A rotor having radially slidable vanes is eccentrically rotatably mounted in the bore by bearings in the plates of the liner, the vanes cooperating with the rotor and the liner to define a plurality of rotating variable volume fluid compartments. A fluid inlet port in one end plate communicates sequentially with the fluid compartments. First and second exhaust ports respectively formed in the end plates also communicate sequentially with the fluid compartments, but the two exhaust ports are angularly offset from each other so that the fluid compartments communicate first with the exhaust port remote from the entry end plate and then with the exhaust port at the entry end plate. The exhaust passage from the remote exhaust port passes along the outside of the liner back to the entry end plate, thereby ensuring cooling of both ends of the motor.

Air motor with offset front and rear exhausts

Air tool

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Racine, WI, United States of America

Thomas J Diedrich