Hydraulic operating device and gearbox provided with such an ope

Details Hydraulic operating device and gearbox provided with such an ope Hydraulic operating device and gearbox provided with such an ope

1997-04-11

1999-01-12

Lorence, Richard M.

Machine element or mechanism

Gearing

Interchangeably locked

74364, 60468, 60476, F16H 5904

Patent

active

058573810

ABSTRACT:
Hydraulic operating device, in particular for the operation of a selector fork of a gearbox, and gearbox provided with such an operating device. The device comprises a double-acting cylinder, which is coupled to the selector fork, and a reversible pump. The pump is connected to the working chambers of the cylinder by supply lines. A valve is mounted in each of the supply lines which is operated by fluid flow. This valve comprises a body, a bore formed in the body, a piston, which divides the bore into two chambers, a through-channel, formed in the piston and designed as a flow orifice, connecting the two chambers.

REFERENCES:
patent: 3425293 (1969-02-01), Krawczyk et al.
patent: 3593522 (1971-07-01), Angert et al.
patent: 3672167 (1972-06-01), Griesenbrock
patent: 5444979 (1995-08-01), Funami et al.
patent: 5697251 (1997-12-01), Lorriette et al.
Applicant's Exhibit A--Search Report of priority Netherlands Appl. No. 9401692.
Applicant's Exhibit B--English Translation of Exhibit A.
Applicant's Exhibit C--International Search Report for International Appl. No. PCT/NL95/00349, of which the present application is a continuation.
Applicant's Exhibit D--International Preliminary Examination Report for International App. No. PCT/NL95/00349.

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