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:
Dec. 13, 1988
Filed:
Aug. 24, 1987
Joseph R Stines, Poland, IN (US);
Vance Products Incorporated, Spencer, IN (US);
Abstract
A pressure gauge which may be operably coupled to a fluid pressure supply device and a balloon catheter. The pressure gauge includes a mechanism which impedes a contaminant, such as corrosion and acid flux, from entering the pressurized fluid being measured. In one embodiment, this mechanism may include a piston positioned in a piston chamber. The piston has at least one, and preferably two, O-rings nested therearound to provide a seal with the piston chamber's wall. The piston may include an inter-gasket pressure chamber positioned between two O-rings which is communicated to the top or bottom of the piston, resulting in pressure equilibrium. Several inter-gasket pressure chambers may be provided.