Pneumatic power wrench

Details Pneumatic power wrench Pneumatic power wrench

1986-12-18

1988-10-18

Kazenske, E. R.

Tool driving or impacting

Passage in manipulating handle for drive motor motive fluid

Motive fluid control valve in handle passage

173170, 173DIG2, B23B 4504

Patent

active

047780150

ABSTRACT:
A pneumatic power wrench comprising a housing (10), a rotation motor drivingly connected to an output spindle (11), a pressure air supply passage (22, 24) in the housing (10) connecting the motor to a pressure air source and a manually operable throttle valve (17) disposed in the air supply passage (22, 24) to control the pressure air supply to the motor. An adjustable pressure regulator is arranged in the air supply passage (22, 24) upstream of the throttle valve (17) to provide a desired constant air supply pressure to the motor. The pressure regulator comprises a spring biassed relief valve (32-34) which via a venting passage (42) communicates with the exhaust passage (16) of the tool upstream of a flow restricting silencer (18) mounted therein.

REFERENCES:
patent: 2362608 (1944-11-01), Allen
patent: 3101738 (1963-08-01), Horlacher
patent: 3162250 (1964-12-01), Sindelar
patent: 3298284 (1967-01-01), Alexander

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