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:
Aug. 08, 2000
Filed:
Nov. 15, 1999
Applicant:
Inventor:
Alfred J Farina, Baldwin, NY (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
1375121 ; 137527 ;
Abstract
For a pipe check valve of a known construction involving a peripheral extending rubber seal and known to be installed by being manually urged through ascending movement in the pipe, the newly added recess below the peripheral seal to receive thereinto a fold-down of the seal during the ascending movement to obviate abrasion of the seal as might contribute to leakage of the check valve during use.