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:
Oct. 18, 1988
Filed:
Aug. 03, 1987
James E Ferris, Richardson, TX (US);
Other;
Abstract
A removable, in-place pressure check gauge connectable to the normally closed low pressure test and service valve fitting in the refrigerant circuit of a car air conditioning system has a hollow cylindrical body with first and second open opposite ends. The first end has secured thereto a connection fitting that may be threaded onto the test and service valve, and functions to hold the valve in an open position to admit pressurized refrigerant into the gauge body. The refrigerant exerts a pressure force on a seal element supported for axial movement within the body against the biasing force of a compression spring therein. Pressure-caused movement of the seal element toward the second body end is operative to move an elongated pressure indicating rod from a retracted position within the body outwardly through the second body end to an extended position indicative of the refrigerant pressure. Visual determination of the refrigerant pressure is facilitated by numerical pressure markings and color-coded pressure zone indicia formed on the pressure indicating rod and corresponding to similar pressure indicia on the exterior of the gauge body. After the refrigerant pressure reading has been taken in this manner the indicating rod is manually pushed back into the gauge body and the closure cap is replaced to reseal the second body end and retain the indicating rod in its retracted position within the gauge body.