Fail safe mechanical oil shutoff arrangement for screw...

Details Fail safe mechanical oil shutoff arrangement for screw... Fail safe mechanical oil shutoff arrangement for screw...

F - Mech Eng,Light,Heat,Weapons

25

B

F25B 9/00 (2006.01) F04C 29/00 (2006.01) F25B 1/047 (2006.01)

Patent

CA 2090390

Title FAIL SAFE MECHANICAL OIL SHUTOFF ARRANGEMENT FOR SCREW COMPRESSOR Inventor JEROME C. ROACH Abstract Apparatus as disposed internal of a refrigeration screw compressor which, upon compressor shutdown, shuts off the flow of oil injected into the compressor's working chamber and the oil which is directed to the compressor rotor bearings and which at compressor startup opens oil flow to those locations by the use of ambient internal compressor conditions that inherently exist at those respective times. The operation of the apparatus is therefore "fail safe" and the need for external oil flow cutoff valving and the need to monitor and/or prove oil flow within the compressor is eliminated.

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