Torque generator with reduced backlash

Details Torque generator with reduced backlash Torque generator with reduced backlash

1994-01-14

1995-04-11

Look, Edward K.

Power plants

Pressure fluid source and motor

Expansible chamber type volumetric responsive measuring...

91375A, 180132, F16D 3102, F15B 910

Patent

active

054047226

ABSTRACT:
A torque generator steering device (10) is disclosed of the type including a gerotor displacement mechanism (19) and valving (9), by the rotation of an input shaft (1) results in a hydrostatic power assist to an output shaft (2). In parallel with the power assist path, the input shaft (1) is connected by a torsion bar (15) to a connecting shaft (3) which, in turn, is connected to the output shaft (2). The connections between the torsion bar (15) and the connecting shaft (3), and between the connecting shaft (3) and the output shaft (2) are substantially zero backlash mechanical connections, thus providing a main torque transmitting path in parallel with the power assist path. Below a predetermined level of input torque, rotation of the input shaft (1) results in an immediate and corresponding rotation of the output shaft (2), thus providing a manual steering mode.

REFERENCES:
patent: Re25291 (1962-12-01), Charlson
patent: 3131602 (1964-05-01), Ford
patent: 4169515 (1979-10-01), Presley
patent: 4381905 (1983-05-01), Petersen
patent: 4557676 (1985-12-01), Petersen et al.
patent: 4905782 (1990-03-01), Rieger et al.
patent: 4936094 (1990-06-01), Novacek
patent: 5070956 (1991-12-01), Pawlak et al.
patent: 5072586 (1991-12-01), Fassbender

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