Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1998-05-04
2000-03-28
Rivell, John
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
137559, 251 33, F16K 3700
Patent
active
06041815&
ABSTRACT:
A system for indicating a position of a piston inside a cylinder of a control valve. The indicator of the present invention has an enclosed shaft which prevents the use of the shaft to tamper with the piston. The position of the shaft inside a shaft housing is indicated using a pair of magnets a first magnet is connected to a first end of the shaft and a second magnet is slidably mounted to an outside of the shaft housing. As the shaft moves the first magnet inside the housing, the second magnet moves outside the housing. The second magnet and shaft housing are enclosed in a transparent housing to prevent damage. The shaft housing has a threaded connector for connecting the shaft housing to a valve housing over the piston to prevent leakage through the shaft housing. A groove in a second end of the shaft receives teeth from a toothed retaining ring affix the shaft to the piston. The second end of the shaft also has a tapered end to allow the shaft to be connected to the piston without removing the piston from the housing.
REFERENCES:
patent: 1719686 (1929-07-01), Browne
patent: 2313448 (1943-03-01), Ludeman
patent: 2446657 (1948-08-01), MacLeod et al.
patent: 2533491 (1950-12-01), McMahon et al.
patent: 2638582 (1953-05-01), Urso et al.
patent: 3028878 (1962-04-01), Natho
patent: 3896280 (1975-07-01), Blake
patent: 3896850 (1975-07-01), Waltrip
patent: 3971412 (1976-07-01), Wierzbicki
patent: 3977423 (1976-08-01), Clayton
patent: 4148339 (1979-04-01), Waltrip
patent: 4406303 (1983-09-01), Kilmoyer
patent: 4590967 (1986-05-01), Schmitt et al.
patent: 5144977 (1992-09-01), Eggerton et al.
patent: 5497725 (1996-03-01), Theisen et al.
patent: 5535698 (1996-07-01), Trevison
Reference # 1 25 cited on PTO-892.
Micro Motion Inc.
Rivell John
LandOfFree
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