Opposite way pressure detecting type shuttle relief valve

Details Opposite way pressure detecting type shuttle relief valve Opposite way pressure detecting type shuttle relief valve

1996-04-03

1998-06-16

Ferensic, Denise L.

Fluid handling

Line condition change responsive valves

Bi-directional flow valves

F16K 1726

Patent

active

057655901

ABSTRACT:
The present invention provides a shuttle relief valve comprising a housing provided with left and right conduit holes respectively connected to the left and right conduits which are arranged between a pressure source and a hydraulic motor in a hydraulic circuit system, and a space portion communicating the conduit holes with each other. A spool is slidably disposed in the space portion so that the space portion is selectively opened or closed by the movement of the spool. A spring urges the spool into the position in which the space portion is closed, and a left cover is fitted in one hollow portion of the housing formed on one side of the space portion so that it supports the movement of the left portion of the spool. A bushing is fitted in the other hollow portion of the housing formed on the other side of the space portion so that it supports the movement of the right portion of the spool.

REFERENCES:
patent: 3807443 (1974-04-01), Jacobs
patent: 4016903 (1977-04-01), Akashi et al.
patent: 4439984 (1984-04-01), Martin
patent: 4476890 (1984-10-01), Kawasaki et al.
patent: 4820136 (1989-04-01), Saurwein
patent: 5048561 (1991-09-01), Taplin et al.
patent: 5462341 (1995-10-01), Koyano et al.

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