Oilless air motor assembly for hydraulic pumps

Details Oilless air motor assembly for hydraulic pumps Oilless air motor assembly for hydraulic pumps

2007-06-12

2007-06-12

Freay, Charles G. (Department: 3746)

Pumps

Motor driven

Fluid motor

C417S398000, C091S228000

Reexamination Certificate

active

10701031

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.

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Hydraulics International, Inc., Product Description, 2 pages, at least as early as Sep. 17, 2001.

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