Shut-off apparatus for pneumatic driven tools

Details Shut-off apparatus for pneumatic driven tools Shut-off apparatus for pneumatic driven tools

1979-01-17

1981-12-29

Mackey, Robert

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

81470, 415 25, 415 36, 418 41, B23Q 506, F01B 2506, B25B 2100

Patent

active

043077846

ABSTRACT:
The improved shut-off apparatus for pneumatically driven tools includes an auxiliary shut-off valve located in the flow passageway. The valve is controlled by a control rod which extends through the air motor into engagement with a latching device. The latching device is held in the latched position with the valve open by a movable weighted control member. The movable weighted control member is responsive to inertia so that as the speed of the air motor decreases due to a torque load imposed thereon, the shaft slows causing the inertial movement of the weighted member to release the latching device permitting the auxiliary shut-off valve to close.

REFERENCES:
patent: 379872 (1888-03-01), Hopkins
patent: 3477521 (1969-11-01), Kiester et al.
patent: 3904305 (1975-09-01), Boyd
patent: 4004859 (1977-01-01), Borries
Mechanics of Machinery, 3rd Ed., N.Y., McGraw-Hill Book Co., Inc., 1948, pp. 51, 52.
Mechanical Engineer's Handbook, Ed. by Lionel S. Marks, 4th Ed., N.Y., McGraw-Hill Book Co., Inc., 1941, pp. 1013, 1014.

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