Check valve with poppet dashpot/frictional damping mechanism

Details Check valve with poppet dashpot/frictional damping mechanism Check valve with poppet dashpot/frictional damping mechanism

1992-06-22

1993-08-31

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

137514, F16K 1506

Patent

active

052400360

ABSTRACT:
An inline check valve for a flow line where the valve element is guided for inline travel forward and rearward of a valve sealing member and is spring biased to a closed sealing condition. One of the guides for the valve element includes a dashpot housing with a bore and plunger member to control the rate of travel of the valve element in either direction as well as providing a guiding function. The plunger member is arranged with a dashpot ring to frictionally contact the dashpot bore and has an interior tortuous flow path from one side to the other side of the dashpot ring. The dashpot housing is not anchored to the valve body so that the valve can be functional even if the dashpot ring becomes jammed in the dashpot housing.

REFERENCES:
patent: 1003413 (1911-09-01), Ballard
patent: 1754975 (1930-04-01), Anderson
patent: 2318962 (1943-05-01), Parker
patent: 2969085 (1961-01-01), Nystrom
patent: 3605802 (1971-09-01), Hertell
patent: 3756273 (1973-09-01), Hengesbach

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