Dashpot assembly

Details Dashpot assembly Dashpot assembly

1982-04-07

1984-09-18

Walton, George L.

Valves and valve actuation

Fluid actuated or retarded

Dashpot or fluid controlled retarder or timer

251 47, F16K 2102, F16K 31122

Patent

active

044719400

ABSTRACT:
A dashpot assembly has a movable cylindrical element mounted within a housing. The movable element has a chamber with a first opening for restricting flow of fluid into the chamber and a second opening for permitting rapid flow of fluid out of the chamber. An enlarged head is disposed inside the chamber and is coupled to a poppet with a spring coupled between the poppet and the movable element. When the poppet moves in a direction away from the movable element, the enlarged head closes the second opening and pulls the element. Fluid then flows into the chamber only through the restricted first opening, thereby damping the rate of movement of the poppet. When the poppet moves in a direction toward the movable element, the enlarged head opens the second opening and the spring is effective to move the element in the same direction; fluid flows unrestricted through the second opening, thereby permitting an undamped movement of the poppet.

REFERENCES:
patent: 132523 (1872-10-01), Cooper
patent: 506221 (1893-10-01), Gilcher
patent: 639316 (1899-12-01), Turnbull
patent: 1874793 (1932-08-01), Nightingale et al.
patent: 4239180 (1980-12-01), Thuries et al.

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