Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1976-07-06
1977-12-27
Jones, Jr., James L.
Tools
Wrench, screwdriver, or driver therefor
Machine
81 5729, B25B 1700
Patent
active
040647722
ABSTRACT:
The disclosure relates to a pneumatic tubing wrench wherein a radially slotted socket member is rotatably mounted in a housing end portion having a similar slot. When the slots of the socket and the housing are aligned, the socket may be placed over a length of tubing and engaged on a fastener. For realignment of the slots following tightening of a fastener and axial disengagement of the socket from the fastener, a spool type valve is provided near the throttle valve. When the throttle lever is depressed only slightly, the throttle valve is opened to admit a very small flow of air through the secondary exhaust flow path of the tool's air motor, thereby driving the motor in reverse. A spring-biased pin and inclined slot arrangement on a portion of the tool's gearing permits the motor to be driven backward only to the position wherein the socket and housing slots are aligned. When the throttle lever is fully depressed, the spool valve is shifted so that air at line pressure is admitted into the intake area of the motor to drive the motor in the forward direction.
REFERENCES:
patent: 2546579 (1951-03-01), Adams et al.
patent: 3084674 (1963-04-01), Watson
patent: 3093360 (1963-06-01), Krouse
patent: 3257877 (1966-06-01), Ulrich et al.
patent: 3987692 (1976-10-01), Lesner et al.
Boyd H. Edward
Freiburger Thomas M.
Cooper Industries Inc.
Jones Jr. James L.
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