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:
Jun. 19, 1984
Filed:
Nov. 30, 1981
Applicant:
Inventor:
Rolf O Orchard, Manhattan Beach, CA (US);
Assignee:
Puritan-Bennett Corp., Los Angeles, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K / ; F16K / ; A61M / ;
U.S. Cl.
CPC ...
137494 ; 251 611 ; 12820524 ;
Abstract
A diaphragm (40) for use in an exhalation valve (20) in a respirator. The diaphragm is tapered in thickness to provide substantially reduced vibration and noise. The diaphragm flexes and peels up from its valve seat (32) to provide the improved operation at low flow rates through the valve.
Orchard, Rolf. (1984). Low-noise diaphragm for use in exhalation valve (U.S. Patent No. 4454893). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4454893
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile