Reciprocating fluid stroke motors with automatic control

Details Reciprocating fluid stroke motors with automatic control Reciprocating fluid stroke motors with automatic control

1976-11-04

1978-11-28

Maslousky, Paul E.

Motors: expansible chamber type

Constantly open throttled exhaust with controlled motive...

91224, 91229, 91235, 91347, F01B 718, F01L 2104, F01L 1512, F01L 3102

Patent

active

041270576

ABSTRACT:
A new control system is provided for a reciprocating fluid stroke motor of the type which is pressured at its rod end, reciprocation being achieved by intermittent exposure of its full blind-end face to the pressure fluid to overcome the pressure applied to its smaller rod-end face. The control means includes a valve for a passage through the piston, with adjustably-positioned trip-stops for shifting the valve between open and closed positions. The valve is biased to snap fully open when the piston movement toward its opening-stop opens it slightly and remain open until striking the closing-stop. Monostable or bistable trip-switch types of biasing means may be used, and unless one holding the valve closed with no fluid pressure is chosen, resumption of pressure supply after discontinuance will cause an initial retraction of the piston to its starting position, allowing time for the controlled apparatus to attain acceptable speed. Speed of operation can be controlled by adjustment of the constantly-constricted discharge port on the blind or full face side of the piston.

REFERENCES:
patent: 126623 (1872-05-01), Chandler
patent: 529581 (1894-11-01), Barnett
patent: 1142551 (1915-06-01), Burnhart
patent: 2295880 (1942-09-01), Valois et al.
patent: 2748751 (1956-06-01), Johnson
patent: 3646849 (1972-03-01), Smith

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