Shut-off apparatus for pneumatic driven tools

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

1981-05-15

1982-11-16

Mackey, Robert

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

B23Q 506, F01B 2506, B25B 2100

Patent

active

043591078

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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