EP 0573144 A1 19931208 - Compressor unloader.
Title (en)
Compressor unloader.
Title (de)
Entlastungsvorrichtung für Verdichter.
Title (fr)
Dispositif de déchargement pour compresseur.
Publication
Application
Priority
- US 145293 A 19930107
- US 89171992 A 19920601
Abstract (en)
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). <IMAGE>
IPC 1-7
IPC 8 full level
F04B 35/04 (2006.01); F04B 39/06 (2006.01); F04B 49/24 (2006.01)
CPC (source: EP)
F04B 35/04 (2013.01); F04B 39/066 (2013.01); F04B 49/243 (2013.01)
Citation (search report)
- [A] US 4519752 A 19850528 - VALENTIN INGO [US]
- [A] PATENT ABSTRACTS OF JAPAN vol. 7, no. 44 (M-195)(1189) 22 February 1983 & JP-A-57 193 786 ( SANWA ) 29 November 1982
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0573144 A1 19931208; AU 3837493 A 19931202; CA 2095772 A1 19931202; TW 223140 B 19940501
DOCDB simple family (application)
EP 93303142 A 19930422; AU 3837493 A 19930504; CA 2095772 A 19930507; TW 82103483 A 19930504