Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1994-06-27
1996-03-12
Rivell, John
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
13762569, 336 20, 32420715, F16K 3700
Patent
active
054978041
ABSTRACT:
An apparatus for determining the spool position of a directional valve is disclosed. A longitudinal valve housing has opposed ends and a plurality of fluid ports, and a spool moves reciprocatingly within the valve housing. A first spring disposed adjacent an end of the spool extends and retracts with the reciprocating movement of the spool. A first oscillator circuit is coupled to the first spring and is adapted to produce a first position signal in response to the inductance of the first spring. Finally, a logic device determines the incremental linear position of the spool relative to the housing in response to the frequency of the first position signal.
REFERENCES:
patent: 2448296 (1948-08-01), Cary, Jr.
patent: 2563413 (1951-08-01), Ostrow
patent: 3302108 (1967-01-01), Murphy
patent: 3654549 (1972-04-01), Maurer et al.
patent: 4085394 (1978-04-01), Weisenburger
patent: 4226126 (1980-10-01), Herden
patent: 4631478 (1986-12-01), Knetsch et al.
patent: 4825184 (1989-04-01), Bloch et al.
patent: 4879511 (1989-11-01), Leon
patent: 4953590 (1990-09-01), Kakinuma et al.
patent: 5101856 (1992-04-01), Kakinuma et al.
patent: 5118071 (1992-06-01), Huelle
patent: 5233293 (1993-08-01), Huang et al.
Patent application Ser. No. 08/197,624, filed Feb. 16, 1994, "Position Sensor for a Hydraulic Cylinder", George (NMI) Codina, et al., Docket No. 93-447.
Codina George
Oestmann Eldon D.
Shane Gary J.
Caterpillar Inc.
Masterson David M.
Rivell John
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