Title:
COMPRESSOR COMPRESSOR
Document Type and Number:
WIPO Patent Application WO1996018037
Kind Code:
A3
Abstract:
An electromagnetic reciprocating compressor has a body (1,2), a piston (10) reciprocating in the body, and an electromagnetic drive (22,23,24) for the piston. The piston has a piston head (11) which slides in a cylinder (12) in the body to effect compression of fluid in the cylinder during operation of the compressor and, axially spaced from the piston head, a piston guide member (13) slidingly movable on a guide surface (14) provided by the body. The compressor has a compression spring arrangement (20) comprising at least one helical compression spring (20a,b) acting to drive the piston axially. The spring (20a,b) is mounted around the piston and is at least partly located within the cylinder during at least part of the piston stroke but is outside the working volume of fluid undergoing compression. The compressor is compact and uneven wear can be reduced.
Inventors:
HANNAGAN ANGUS PATRICK DOUGLAS (GB)
MCGRATH MICHAEL ALAN (GB)
MCGRATH MICHAEL ALAN (GB)
Application Number:
PCT/GB1995/002901
Publication Date:
August 29, 1996
Filing Date:
December 08, 1995
Export Citation:
Assignee:
PEGASUS AIRWAVE LTD (GB)
HANNAGAN ANGUS PATRICK DOUGLAS (GB)
MCGRATH MICHAEL ALAN (GB)
HANNAGAN ANGUS PATRICK DOUGLAS (GB)
MCGRATH MICHAEL ALAN (GB)
International Classes:
F04B35/04; (IPC1-7): F04B35/04
Domestic Patent References:
| WO1994028306A1 | 1994-12-08 |
Foreign References:
| EP0509660A1 | 1992-10-21 | |||
| US3588291A | 1971-06-28 | |||
| US5100304A | 1992-03-31 | |||
| GB2219047A | 1989-11-29 | |||
| FR2129746A5 | 1972-10-27 |
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