Pressure gauge for use with sanitary conduit

Details Pressure gauge for use with sanitary conduit Pressure gauge for use with sanitary conduit

2007-03-13

2007-03-13

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Fluid pressure gauge

Piston

C073S861490

Reexamination Certificate

active

11230381

ABSTRACT:
A standard industrial pressure gauge is adapted for a sanitary conduit that has been provided with a tubular stub for mounting the gauge. A cylinder has a disk flange that mates with an upper flange of the tubular stub. A cap closes off the top of the cylinder, and a female threaded nipple is affixed on the cap over an aperture through the cap. A piston has one or a pair of O-ring seals seated on the circumferential surface of the piston, with the piston having at least a limited range of motion within the cylinder. The gauge is fitted into the threads of the nipple, and the space above the piston and through the aperture and the nipple is filled with an incompressible fluid. In one embodiment, there is a leak detector hole in the cylinder wall aligned with the space between the two O-rings.

REFERENCES:
patent: 4380166 (1983-04-01), Crombie
patent: 4715230 (1987-12-01), Tatsuzawa
patent: 4754648 (1988-07-01), Byrd et al.
patent: 4790821 (1988-12-01), Stines
patent: 4862754 (1989-09-01), Nimberger
patent: 4930361 (1990-06-01), Nimberger
patent: 5259235 (1993-11-01), Kolb
patent: 6207112 (2001-03-01), Spallek et al.
patent: 2004/0200289 (2004-10-01), Sherman et al.
Anderson Instrument Co., Fultonville NY; Anderson Sanitary Pressure Gauges sales brochure. (2005).
Anderson Instrument Co., Fultonville NY; Digital Pressure Gauge & Switch sales brochure. (2005).

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