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. 28, 1994
Filed:
Dec. 18, 1992
Applicant:
Inventor:
Thaddeus J Kalowski, Lisle, IL (US);
Assignee:
Specialty Equipment Companies, Inc., Chicago, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01L / ;
U.S. Cl.
CPC ...
116272 ; 116266 ;
Abstract
A filter gauge comprising a piston operable in a pressurized cylinder, the piston having a rod which projects from the cylinder, and grippers mounted within the cylinder and accommodating movement of the piston and rod having indicia indicating the lowest pressure reached in the cylinder as a water conduit to which the cylinder is connected is being drained. The grippers prevent the rod from moving in the opposite or extending direction as the cylinder is being pressured gradually by the water seeping through the filter and equalizing the pressure at both sides thereof.