Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator
Patent
1992-09-30
1994-03-15
Chambers, A. Michael
Fluid handling
With indicator, register, recorder, alarm or inspection means
Position or extent of motion indicator
137607, 74471X, 345161, F16K 3700
Patent
active
052939006
ABSTRACT:
A direct drive joystick has a contactless system for sensing the position of the joystick lever and having valve drivers which are positioned within the joystick, and which are directly connected to coils of a proportional valve. The joystick thus is not prone to failure due to internal friction of its sensing elements and at the same time is capable of directly driving valves without the provision of any other devices between the joystick and the valves. The joystick including the valve driver is rugged, compact and can be easily installed. The valve driver can be adjusted by an operator who is simultaneously actuating the joystick. The operational status of one or more of the joystick, the valve being controlled by the joystick, and the power source for the valve and joystick are visually displayed at a location which can be easily viewed by the joystick operator. Operation of the valve driver and thus of the joystick is prevented upon failure of a signal wire or upon generation of a joystick fault signal.
REFERENCES:
patent: 4646087 (1987-02-01), Schumann
patent: 4646778 (1987-03-01), Tsuji et al.
patent: 4656461 (1987-04-01), Morsch et al.
patent: 4825157 (1989-04-01), Mikon
P-Q Controls, Inc. Multi-Axis Sales Brochure, Jun. 1988.
OEM Controls, Inc. sales Brochure, Oct. 1988.
Penny & Giles Potentiometers Limited Specification Sheet, HVC2/Aug. 1986.
Apitech Electronic Controller Specification Sheet Nos. 20-677 and 20-680, Jan. 1985.
Heck Edward T.
Karbassi Hassan
Chambers A. Michael
Hydro Electronic Devices Inc. (HED)
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