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. 20, 1976
Filed:
May. 02, 1975
Applicant:
Inventor:
Marvin H Grove, Houston, TX (US);
Assignee:
M & J Valve Company, Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
G01M / ;
U.S. Cl.
CPC ...
73 46 ; 137557 ; 251324 ;
Abstract
Apparatus having cup-shaped sealing members of resilient material carried by a plunger with their rim portions faced toward each other. The rims are successively contracted when the plunger assembly is moved into an associated cylindrical sleeve, with exterior areas of the rims in sealing contact with the inner cylindrical surface of the sleeve. There is a closed space between the sealing members in which liquid is trapped under pressure as the plunger is moved into the sleeve.