Hydraulic dashpot for pipeline systems

Details Hydraulic dashpot for pipeline systems Hydraulic dashpot for pipeline systems

1989-05-15

1991-05-28

Halvosa, George E. A.

Brakes

Internal-resistance motion retarder

Resistance alters relative to direction of thrust member

188317, 18832215, 1375125, 1375137, F16F 934

Patent

active

050186078

ABSTRACT:
A hydraulic dashpot for supporting pipes or similar loads comprises a cylinder having a piston mounted for displacement therein, the piston setting-off the cylinder chambers which are in fluid communication with a fluid storage chamber, and the piston having an inner chamber housing a valve seat body of a main control valve. The main control valve includes a pair of piston-type valve members reciprocally carried by the valve seat body and biased by a spring. The inner chamber and valve seat body have opposing peripheral surfaces and one of these surfaces is provided with a groove running the length thereof and at each end being merged with axial grooves which places the axial opposite ends of the inner chamber in fluid communication with each other to prevent blockage/locking-up during dashpot operation.

REFERENCES:
patent: 4079750 (1978-03-01), Ludwig
patent: 4553883 (1985-11-01), Brooks
patent: 4588053 (1986-05-01), Foster

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