Servo mechanism

Details Servo mechanism Servo mechanism

1973-07-26

1976-03-16

Husar, C. J.

Power plants

Pressure fluid source and motor

Condition responsive control of or by input to input pump...

60447, 60449, 74687, 74857, 91416, 91417R, 91454, 91457, 91461, F02B 4100

Patent

active

039437159

ABSTRACT:
A servo mechanism for a prime mover interconnected to a hydrostatic transmission includes a source of pressurized fluid, a fluid reservoir, an actuator having a piston operatively connected to the hydrostatic transmission and being provided with large and small hydraulic receiving areas which are exposed to first and second hydraulic chambers, respectively within the actuator housing, a first passage for connecting the pressurized fluid source to the second chamber, a second passage for connecting the pressurized fluid source to the first chamber, a third passage for connecting the first chamber to the reservoir, and a pair of spool valve means disposed, respectively, within the second and third passages and responsive to a signal indicative of the power required of the prime mover and an actual speed or feedback signal of the prime mover.

REFERENCES:
patent: 2974639 (1961-03-01), O'Connor et al.
patent: 3080887 (1963-03-01), Brandenberg
patent: 3139723 (1964-07-01), Holowell
patent: 3300000 (1967-01-01), Stoyke
patent: 3583154 (1971-06-01), Utter
patent: 3665788 (1972-05-01), Nyman
patent: 3679327 (1972-07-01), Riedhammer et al.
patent: 3763744 (1973-10-01), Fournell et al.
patent: R26523 (1969-02-01), Tennis
IBM Technical Disclosure Bulletin, Vol. 10, No. 5, Oct. 1967, pp. 568-569.

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