Actuating drive

Details Actuating drive Actuating drive

1990-09-21

1993-03-16

Walton, George L.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

91361, 91459, 251 3001, F16K 3102, F16K 31122

Patent

active

051937794

ABSTRACT:
This actuating drive (1) has a main piston (4) which can be operated by means of an oil pressure and a pilot control system in effective connection to the main piston (4) by means of a linkage (15). The pilot control system includes a control orifice (14) controlling the oil pressure at the main piston (4) and a pilot control piston arrangement (18) which can be operated hydraulically.
The actuating drive (1) is to be designed in such a way that it has improved dynamic characteristics during operation. This is achieved by the fact that the pilot control piston arrangement (18) can be operated by means of an electrohydraulic valve which is triggered by an electronic control unit (31).

REFERENCES:
patent: 3948478 (1976-04-01), Vind
patent: 4106390 (1978-08-01), Kodaira et al.
patent: 4215844 (1980-08-01), Bowen
patent: 4311296 (1982-01-01), Scheffel
patent: 4335867 (1982-06-01), Bihlmaier
patent: 4589444 (1986-05-01), Masek et al.
patent: 4595979 (1986-06-01), Arai et al.
patent: 4637587 (1987-01-01), Kuhnlein
patent: 4807518 (1989-02-01), Berchtold et al.
patent: 4901625 (1990-02-01), Bussan
patent: 4932311 (1990-06-01), Mibu et al.

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