Pumps – With condition responsive pumped fluid control – Pressure responsive relief or bypass valve
Patent
1987-06-22
1988-07-26
Freeh, William L.
Pumps
With condition responsive pumped fluid control
Pressure responsive relief or bypass valve
291571R, F04D 4902, B23P 1500
Patent
active
047596929
ABSTRACT:
A pressure relief valve for a hermetically sealed reciprocating piston compressor is disclosed in which a bore in a compressor cylinder head defines the valve body. Valve components are introduced into the bore through a valve opening on the bottom surface of the cylinder head. A discharge pressure chamber in the cylinder head also has a discharge pressure opening on the bottom surface. A path is provided between the valve opening and the discharge pressure opening, when the compressor is assembled, by means of a duct in a valve plate interposed between the cylinder head and a compressor crankcase. Also disclosed is a method for assembling the pressure relief valve in a cylinder head, whereby the valve components are temporarily retained within the bore by a washer-shaped soft metal valve seat that is compressed and expanded into an annular undercut or recess in the bore located adjacent to the bottom surface of the cylinder head. Upon final assembly of the cylinder head to the crankcase, the valve seat and other valve components are positively retained within the bore.
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Freeh William L.
Tecumseh Products Company
LandOfFree
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