Pneumatic knocking device

Details Pneumatic knocking device Pneumatic knocking device

1989-05-16

1991-03-05

Wayner, William E.

Motors: expansible chamber type

With motive fluid valve

Both inlet and exhaust controlled by motive fluid pressure...

173 1732, F15B 1526

Patent

active

049969072

ABSTRACT:
A pneumatic knocking device comprising an elongate housing (1) in which a spring (9) and a top wall (20) with hole (10) are disposed, further comprising a cover (3) with connecting hole (8), a piston (2) movable towards the cover (3) by means of compressed air against the pressure of the spring (9), and a quick-acting vent valve (3, 8, 11, 15) which is disposed in the region of the cover (3) and which vents the chamber (22) beneath the piston (2) into the spring chamber (13) by means of an air conduit (14) is described and is characterized in that the air conduit (14) is in the form of an air passage which is integrated in the housing, that the top wall (20) is in one piece with the housing (1), the cover (3) forms a valve chamber (15) and is provided with a valve bore (21) in which a control diaphragm (11) is movably disposed in such a way that it can bear against the hole (10) in the top wall (20) and close same, and that the chamber (22) beneath the piston (2) is open outwardly.

REFERENCES:
patent: 3193025 (1965-07-01), Aeitzel
patent: 3610349 (1971-10-01), Dempsey
patent: 4333537 (1982-06-01), Harris

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