Measuring and testing – Fluid pressure gauge – Piston
Patent
1987-08-03
1988-10-18
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Piston
731468, 73756, 116272, G01L 716
Patent
active
047778288
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.
REFERENCES:
patent: 988917 (1911-04-01), Walker
patent: 2160414 (1937-04-01), Eksergian et al.
patent: 3696668 (1972-10-01), Patrick
patent: 3824849 (1974-07-01), Foxhall
patent: 4028936 (1977-06-01), Guy
LandOfFree
Removable, in-place refrigerant pressure check gauge does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Removable, in-place refrigerant pressure check gauge, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Removable, in-place refrigerant pressure check gauge will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1187847