Compressor unloader

Details Compressor unloader Compressor unloader

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 35/04 (2006.01) F04B 39/06 (2006.01) F04B 49/24 (2006.01) F01C 21/12 (1990.01)

Patent

CA 2095772

1-2102 COMPRESSOR UNLOADER Abstract An unloader (11) to facilitate starting and idling an air compressor motor (12). In one embodiment, the compressor (10) has a valve (29), such as an inlet or suction valve, having one or more reeds (28) which are biased to a normally closed position. An end of a wire or spring or a similar mechanism (37) is mounted to hold the valve open to unload the compressor when the motor is stopped or operated below a predetermined minimum speed. The compressor motor (12) also drives a fan (35) which cools the compressor. When the motor (12) reaches the predetermined minimum speed, cooling air flow from the fan moves a vane (42) which is connected to move the wire, spring or other mechanism (37) clear of the valve (29), allowing the valve to close to load the compressor (10). In a modified embodiment of a starting unloader, an opening (110) is provided to vent the high pressure output from the compressor (90) when the motor (91) is stopped or idling. When the compressor motor reaches a predetermined speed, a flow of cooling air from a fan (93) driven by the motor moves a vane (111) to close the vent passage (110).

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