Hydrostatic pump and disable control therefor

Details Hydrostatic pump and disable control therefor Hydrostatic pump and disable control therefor

1999-09-16

2000-12-12

Thorpe, Timothy S.

Pumps

Condition responsive control of drive transmission or pump...

Adjustable cam or linkage

417506, 417222, 91506, 91 3, 60445, 137 83, F04B 126

Patent

active

061589691

ABSTRACT:
A variable displacement hydrostatic pump (11) having its displacement varied by a controller (17) in response to movement of a manual control lever (95) from a neutral position (FIG. 1). The vehicle has at least one other device (125,127) which provides an electrical output signal (133) indicating when operation of the pump (11) is "acceptable", in terms of either vehicle performance or operator safety. Associated with the control lever (95) is an input shaft (103) defining at least one stop surface (121,123). A solenoid assembly (109) has a moveable plunger (111), disposed adjacent the stop surfaces, and moveable between a retracted position (FIG. 4a) and an extended position (FIGS. 2 and 4), engaging one of the stop surfaces, when the output signal (133) indicates that operation of the pump is not acceptable.

REFERENCES:
patent: 3401711 (1968-09-01), Kubilos
patent: 3733963 (1973-05-01), Kubilos
patent: 3736073 (1973-05-01), Walmsley
patent: 3803987 (1974-04-01), Knapp
patent: 4050247 (1977-09-01), Connett
patent: 4116602 (1978-09-01), Knapp et al.
patent: 5226349 (1993-07-01), Alme et al.
patent: 5378127 (1995-01-01), Welscher
patent: 6030182 (2000-02-01), Voigt
patent: 6068451 (2000-05-01), Uppal
Eaton Corporation drawing of Control Valve Assembly Number 34673-AAV (Two pages).

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