The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2007
Filed:
Oct. 12, 2004
Hiroshi Okada, Anjo, JP;
Eitaro Tanaka, Oobu, JP;
Hiroshi Okada, Anjo, JP;
Eitaro Tanaka, Oobu, JP;
Denso Corporation, Kariya, JP;
Abstract
In a gas compression apparatus, a space () between oil seals () and bearings () is adapted to communicate with a low pressure lead hole () open to the atmosphere through a blow-down lead hole (). The low pressure lead hole is opened/closed by an on-off valve () arranged on the side of the blow-down lead hole nearer to the low pressure lead hole. As a result, when the gas compression apparatus stops operation, the internal pressures of the space () and a lubricant space () drop while the internal pressure of a compression chamber () drops. A valve body () thus moves down and opens the low pressure lead hole, so that the internal pressure of the lubricant space becomes substantially equal to the atmospheric pressure. Thus, the lubricant is prevented from leaking from the lubricant space into the compression chamber.