Reciprocating hydraulic machine, especially a motor, and...

Details Reciprocating hydraulic machine, especially a motor, and... Reciprocating hydraulic machine, especially a motor, and...

2007-04-24

2007-04-24

Leslie, Michael (Department: 3745)

Motors: expansible chamber type

Cyclically operable

Biasing means moves distributor after predetermined travel

C091S303000, C092S171100

Reexamination Certificate

active

10536358

ABSTRACT:
A hydraulic motor comprises a body and a piston able to slide in a reciprocating movement in a cylindrical housing of the body. A chamber (C1,C2) is formed on each side of the piston and hydraulic switching means are provided for feeding and evacuating the respective chambers (C1,C2), these switching means being able to adopt two stable positions. Control means (H) having elastic means for abruptly bringing about changes in the position of the switching means are included. There are triggering means (13, 15) able, at the end of the stroke of the piston (9), to bring about the change in position of the switching means (G). The piston (9) has a closed cross section and the switching means (G) are arranged in the body (1) of the machine, redially on the outside of the cylindrical housing (7) in which the piston (9) slides.

REFERENCES:
patent: 2808815 (1957-10-01), Cromwell
patent: 4756329 (1988-07-01), Cloup
patent: 5234322 (1993-08-01), Daniels et al.
patent: 6129526 (2000-10-01), Kelly
patent: 6499384 (2002-12-01), Blair
patent: 6901960 (2005-06-01), Roberts et al.
patent: 2 789 445 (2000-08-01), None

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