Dual-mode control for hydrostatic transmission

Details Dual-mode control for hydrostatic transmission Dual-mode control for hydrostatic transmission

1991-06-17

1992-04-28

Smith, Leonard E.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

417222R, 60444, 91506, F04B 126

Patent

active

051082675

ABSTRACT:
A variable displacement hydrostatic unit (11) includes a swashplate (23), the position of which is controlled by a servo piston (73). A multiple mode control (33) is disclosed, including a main valve member (63) and a secondary valve member (65), both of which are attached to a linkage member (61) by which movement of a manual control handle (47) actuates the main and secondary valve members. The flow of control pressure from a charge pump (21) ot the servo piston (73) is controlled by a pair of solenoid valves (83,85) having two control conditions. In one, control pressure flows through the main valve member (63) to give a normal operating mode (FIG. 6), while in the other control condition, control pressure flows through the secondary valve member (65) to provide a secondary operating mode (FIG. 7).

REFERENCES:
patent: Re31711 (1984-10-01), Horiuchi
patent: 3647322 (1972-03-01), Molly
patent: 3715017 (1973-02-01), Jenny
patent: 3898812 (1975-08-01), Walton
patent: 4050247 (1977-09-01), Connett
patent: 4364230 (1982-12-01), Holmes
patent: 4463559 (1984-08-01), Holdenreid
patent: 4530416 (1985-07-01), Kassai
patent: 4823552 (1989-04-01), Ezell et al.
patent: 4846046 (1989-07-01), Kanai et al.
patent: 4951462 (1990-08-01), Graf

Affiliated with

Also associated with

Rating

Dual-mode control for hydrostatic transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dual-mode control for hydrostatic transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual-mode control for hydrostatic transmission will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1243829