Measuring and testing – Fluid pressure gauge – Piston
Patent
1984-10-16
1986-11-18
Woodiel, Donald O.
Measuring and testing
Fluid pressure gauge
Piston
73714, 116 34R, 1371165, 137557, G01L 716
Patent
active
046228578
ABSTRACT:
A pressure gauge and regulator for use in dispensing compressed air and similar gases from pressurized vessels. The device includes a linear pressure gauge having a spring loaded plunger slidingly carried within a cylinder. The plunger has an O-ring to seal against the cylinder wall, and a spring with a spring constant linearly relating longitudinal movement of the plunger to gas pressure against the plunger. A viewing port in the cylinder wall allows viewing of the position of the plunger and corresponding gas pressure. A hole in the cylinder wall may be provided to allow excess pressure to escape when the plunger seal is depressed past this hole. The device also includes a ball and seat valve for selectively releasing compressed gas from the inlet to the outlet. A piston movable in response to gas pressure at the outlet controls the valve, and a compression spring is provided for selectively urging the piston against this gas pressure. The piston includes a vent normally sealed to the ball but disengageable therefrom so that when gas pressure exceeds the spring pressure, the piston and vent move away from the ball, breaking this seal and allowing gas to escape until spring pressure again exceeds gas pressure.
REFERENCES:
patent: 1086296 (1914-02-01), Howe
patent: 1176338 (1916-03-01), Bromberg
patent: 1220272 (1917-03-01), Pollock
patent: 3286726 (1966-11-01), Guy
patent: 3288165 (1966-11-01), Cranage
patent: 3656497 (1972-04-01), Brown
patent: 3948045 (1976-04-01), Budinski et al.
patent: 3955590 (1976-05-01), Palm et al.
Haller James R.
Kaihoi Gregory P.
Sanborn Manufacturing Company, Inc.
Woodiel Donald O.
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