Discharge valve for reciprocating hermetic compressor

Details Discharge valve for reciprocating hermetic compressor Discharge valve for reciprocating hermetic compressor

1990-11-07

1992-03-17

Nilson, Robert G.

Pumps

Expansible chamber type

Having pumping chamber pressure responsive distributor

13754319, F16K 1502

Patent

active

050963953

ABSTRACT:
A discharge valve for a reciprocating hermetic compressor of the type comprising a cylinder housing a reciprocally driven piston. A valve plate is mounted on the cylinder and has a discharge orifice the outer face of the valve plate having a recess with a side wall surrounding said discharge orifice and defining a valve seat. A sealing member is axially movable between a closing position against the valve seat. A backstop member is externally attached to the valve plate so as to limit the axial displacement of the opening sealing member. Guide elements for axial displacement of the sealing member are provided around the latter and mounted between the valve plate and the backstop member. There is a resilient deformable means with an end attached to the backstop member and another end opposite to the first one, provided at a plane adjacent to the outer face of the sealing member, opposite to that face sealing against the valve seat. When the latter is at a closing position of the valve seat, such resiliently deformable means being pressed by the sealing member, from a non-pressed condition to a resiliently pressed condition when the sealing member is displaced from the closing to the opening position, by means of a predetermined pressure value in the cylinder and the resiliently deformable means being guided by the backstop member while it is deformably moved by the axial displacement of the sealing member.

REFERENCES:
patent: 1737710 (1929-12-01), Erbach
patent: 1938418 (1933-12-01), Evans
patent: 4612962 (1986-09-01), Purvis
patent: 4729402 (1988-03-01), Blass

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