Tool driving or impacting – Drive controlled by relative axial movement of tool – Drive motor controlled
Patent
1978-11-30
1985-02-05
Mackey, Robert
Tool driving or impacting
Drive controlled by relative axial movement of tool
Drive motor controlled
227 8, B25C 104, B25C 502
Patent
active
044973772
ABSTRACT:
A pneumatic tool is disclosed for use in puncturing or hammering applications, particularly cattle stunning and the like.
The tool generally comprises a cylinder, a piston slidably mounted in the cylinder, a hammer or striker connected to the piston, an air manifold or supply chamber, a reservoir connected to the air manifold, a quick-acting poppet valve for rapidly admitting air upon command to the upper end of the cylinder from the air reservoir, a trigger-operated primer valve adapted to (1) transmit high pressure air from the air manifold to the lower end of the cylinder so as to cause the piston to retract the hammer when the poppet valve is closed, or (2) exhaust high pressure air from the underside of the piston so that when the poppet valve is opened high pressure air from the air reservoir will cause the piston to drive the hammer through its impact stroke, and a feeler-operated control valve adapted to (1) transmit high pressure air from the air reservoir to the poppet valve so as to cause the poppet valve to close off the upper end of the cylinder from the high pressure air held in the reservoir, or (2) exhaust high pressure air from the poppet valve so as to cause the poppet valve to open so as to expose the upper end of the cylinder to the high pressure air in the reservoir, and thereby cause the piston to drive the hammer through its impact stroke if the primer valve is suitably set.
REFERENCES:
patent: 716274 (1902-12-01), Peirce, Jr.
patent: 2807021 (1957-09-01), Chellis
patent: 3599854 (1971-08-01), Pearson et al.
patent: 3601007 (1971-08-01), Korth
patent: 3786847 (1974-01-01), Schera, Jr.
patent: 4040554 (1977-08-01), Haytayan
patent: 4122904 (1978-10-01), Haytayan
Mackey Robert
Pneutek, Inc.
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