Power plants – Pressure fluid source and motor – Condition responsive control of motive fluid flow
Patent
1980-03-21
1982-08-10
Cohen, Irwin C.
Power plants
Pressure fluid source and motor
Condition responsive control of motive fluid flow
60475, 60476, F15B 13042
Patent
active
043431534
ABSTRACT:
Means are disclosed for dissipating supercharge pressure in a hydraulic system including a reversible pump (18) directly connected to a hydraulic cylinder (22). Supercharge pressure results from unequal areas on either side of a piston (24) of a single-ended hydraulic cylinder (22). When the piston moves towards the blind end of the cylinder (22), more fluid is displaced from the cylinder than is admitted to the cylinder on the opposite side of the piston. Means responsive to a pressure at a first port (82) of the pump (18) opens a passage between the second port (76) of the pump (18) and a fluid reservoir (16), allowing fluid in excess of the pump's intake requirements to pass to the reservoir (16). In a first embodiment of the invention, a rocker mechanism (60) is actuated by a piston (66) responsive to pressure at the first port (82) pressing against a first end (20) of the rocker mechanism (60), the second end (74) of the rocker mechanism (60) displacing a check ball (38) of a keep-full valve. In a second embodiment of the invention, passages (126, 128) are provided in a pilot piston (106) for pilot-operated check valves (42, 44), so that when the piston (106), in response to pressure at the first port (82), opens a check valve (42), to allow fluid to return from the cylinder (22), passages (126, 128) in the piston (106), opening upon the face (129) of the pilot piston (106) adjacent the check valve, become aligned with a passage (130) to the reservoir (16), allowing excess or supercharge oil to flow to the reservoir (16).
REFERENCES:
patent: 1812587 (1931-06-01), Ellis
patent: 2467508 (1949-04-01), Trautman
patent: 2679727 (1954-06-01), McLeod
patent: 2759456 (1956-08-01), Court
patent: 2931176 (1960-04-01), Bloch et al.
patent: 3234968 (1966-02-01), Frantz
patent: 3408035 (1968-10-01), Lathrop et al.
patent: 3411294 (1968-11-01), Hedermann
patent: 3640068 (1972-02-01), Mann
patent: 3747351 (1973-07-01), Wilkerson et al.
patent: 3795178 (1974-03-01), Roche
Kern Calvin V.
Mitton Bruce W.
Cohen Irwin C.
DeClercq James P.
Eltra Corporation
LandOfFree
Anti-supercharge pressure valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Anti-supercharge pressure valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anti-supercharge pressure valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1526700