192 clutches and power-stop control – Clutches – Plural clutch-assemblage
Patent
1983-09-19
1986-03-11
Krizmanich, George H.
192 clutches and power-stop control
Clutches
Plural clutch-assemblage
192 431, F16D 4104
Patent
active
045749280
ABSTRACT:
A mechanical coupling for a power steering system and the like having a driven member reversibly rotated by a servo-motor in response to either clockwise or counterclockwise rotation of a control member, with the coupling normally connecting the motor to the driven member through a drive transmitting member. In the event of any failure of the motor to rotate the driven member synchronously with the control member, as for example, due to an electrical power failure, rotation of the control member relative to the driven member causes the coupling to disconnect the drive transmitting member and thereby disconnect the motor from the driven member to prevent transmission of torque in the direction opposite to the torque applied by the control member and simultaneously mechanically couple the control member to the driven member for direct drive. During that time, the coupling continues to connect the drive transmitting member to the driven member for transmission of torque in the direction of the torque applied by the control member. An improved drive transmitting coupling is disclosed which comprises a lost motion connection between the control member and the driven member with first and second one-way clutches for coupling the driven member with the drive transmitting member. Each of the clutches includes a set of pivoted pawls mounted on the driven member for driving engagement with the drive transmitting member for driving the driven member in one direction and a set of actuating members mounted on the driven member for disengaging the respective pawls in response to rotation in the opposite direction of the control member relative to the driven member.
REFERENCES:
patent: 2818950 (1958-01-01), Harless
patent: 3511348 (1970-05-01), Jonsson et al.
patent: 4164191 (1979-08-01), Peterson
patent: 4262786 (1981-04-01), Taylor
patent: 4458795 (1984-07-01), Norton
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