Knocking device with autocontrol

Details Knocking device with autocontrol Knocking device with autocontrol

1989-05-16

1990-12-04

Wayner, William E.

Motors: expansible chamber type

With motive fluid valve

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

173 17, 173 32, F15B 1110, E21C 900

Patent

active

049744941

ABSTRACT:
Described is a pneumatic knocking device for knocking dust off bunker walls, comprising a housing (1) which encloses an elongate spring chamber (13) with spring (9), having a vent bore (7), and which is closed at one end by a top wall (20) with hole (10), a valve wall (3) with connecting hole (8), a piston (2) which is movable towards the top wall (20) by means of compressed air against the pressure of the spring (9), and a quick-acting vent valve (3, 8, 10, 11, 14a, 15) which is disposed in the region of the valve wall (3) and which vents the chamber (22) beneath the piston (2) into the spring chamber (13) by means of an air conduit (14).

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

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