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:
Apr. 24, 1990
Filed:
Jul. 10, 1989
Kenneth L Hoffman, Grand Island, NE (US);
Other;
Abstract
A leak detector including a fill cylinder and a pressure cylinder mounted in spaced relationship on a frame. The fill cylinder includes a movable liquid-tight piston, valved ports on one side of the piston, and a vent port on the opposite side. The pressure cylinder includes a movable pressure piston, a pressure regulator in communication with one side of the piston, and an access port on the opposite side. A connecting rod interconnects the liquid-tight piston and the pressure piston and spans the space between the cylinders. A pointer attached to the connecting rod registers with a calibrated scale on the frame and movement of the pointer toward the fill cylinder indicates a leak in the pressurized liquid piping system being tested.