Pumps – Expansible chamber type – Having pumping chamber pressure responsive distributor
Patent
1995-11-14
1996-12-24
Thorpe, Timothy S.
Pumps
Expansible chamber type
Having pumping chamber pressure responsive distributor
137855, 137856, 137521, F04B 5310
Patent
active
055868746
ABSTRACT:
A fluid displacement apparatus comprises a valve plate member dividing a compressor housing into a first chamber and a discharge chamber. A passage is formed in the valve plate member to allow communication between the first chamber and the discharge chamber. An elastic valve member disposed on the valve plate bends to open and close the end of the passage. The valve retainer member is secured to the valve plate together with the elastic valve member and has a curved end portion. A valve seat includes a recessed portion offset from an end surface of the valve plate. The recessed portion includes an inclined portion and a wall portion extending therefrom. The distance between the beginning of the curved portion of the valve retainer member and the securing means is greater than the distance between an edge of the recessed portion of the valve seat and the securing means. Noise and vibration caused by the striking of discharge reed valve against the valve seat and the retainer member are decreased according to this arrangement.
REFERENCES:
patent: 2151746 (1939-03-01), Cody
patent: 4730550 (1988-03-01), Bramstedt et al.
Hashimoto Kenji
Matsumura Yoshito
McAndrews, Jr. Roland G.
Sanden Corporation
Thorpe Timothy S.
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