Title:
OILLESS AIR MOTOR ASSEMBLY FOR HYDRAULIC PUMPS
Document Type and Number:
WIPO Patent Application WO/2003/024667
Kind Code:
A3
Abstract:
An oilless air motor assembly and method useable for driving hydraulic pumps and the like. The air motor assembly comprises a slide valve that moved back and forth relative to a valve sleeve situated about the slide valve. A low friction or lubricious dry seal member is disposed between the slide valve and the valve sleeve, thereby eliminating the need for added oil or lubricant and additionally avoiding the need for precise machining and matching (e.g., honing and lapping) of the slide valve and valve sleeve. Also provided is a kit for converting a previously manufactured air motor assembly that requires oil or added lubricant to an oilless air motor assembly. Such kit comprises the slide valve, valve sleeve and dry seal member as well as other optional parts associated with those elements.
Inventors:
MACH OAI TUAN (US)
MACH HUNG DAN CHAN (US)
MACH HUNG DAN CHAN (US)
Application Number:
PCT/US2002/029680
Publication Date:
March 31, 2011
Filing Date:
September 18, 2002
Export Citation:
Assignee:
SOUTHERN CALIFORNIA HYDRAULIC ENGINEERING INC (US)
International Classes:
F01B3/00; F01B17/02; F01L21/04; F02B69/00; F04B9/123; F04B17/00
Foreign References:
| US3272081A | 1966-09-13 | |||
| US6409482B1 | 2002-06-25 |
Attorney, Agent or Firm:
BUYAN, Robert, D. (Uxa Buyan & Mullins LLP,4 Venture, Suite 30, Irvine CA, US)
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