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US 5,522,475 AGranted
Method and apparatus for exchanging oil in a compressor
OwnerJohn L. Thompsoninventor
Life of this patent
Estimating the term…
Abstract
Apparatus and method of exchanging lubricating oil from the crankcase of a compressor. A unit including a pretrimmed flexible tube is introduced into the oil fill plug opening. By opening an internal valve, the oil under pressure exits through an opening in the unit, which is connected to a drain hose. After emptying, a hand oil pump is connected to the unit and fresh oil introduced into the compressor crankcase.
Claims11
Apparatus for exchanging lubricating oil in a compressor, said apparatus comprising:
- a body portion;
- threaded means on an external end of said body to secure said apparatus into a crankcase oil fill plug opening included in said compressor;
- a first passageway extending longitudinally through said body;
- valve means contained within a first end of said passageway;
- hollow flexible extension means connected to a second end of said passageway;
- said extension means adapted to be trimmed to a predetermined length to facilitate withdrawal of maximum quantities of said lubricating oil from said compressor crankcase;
- said body further including a lubricating oil discharge port comprising a second passageway for connecting said first passageway to the exterior of said body in response to operation of said valve means.
4 more elements
Dependencies are inferred from the claim text.