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:
Jul. 04, 1978
Filed:
Jan. 03, 1977
Tooru Tamura, Kariya, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
An orifice device communicable with a vacuum source comprises a first and a second orifice means of sintered metal. The first orifice means is usually closed by a flexible one-way check valve which may keep closed when the air flows in one direction and may be released from the first orifice means when the air flows in the other direction. The air flow normally is passed through the second orifice means thereby to be restricted in both directions, whereby the orifice means are effective independently of each other. Another embodiment is disclosed wherein a flexible member is mounted in and restricts flow in one direction through the central portion of a single sintered metal element.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile