192 clutches and power-stop control – Clutches – Automatic
Patent
1985-08-05
1987-06-16
Bonck, Rodney H.
192 clutches and power-stop control
Clutches
Automatic
192 81C, 192 93R, 192103B, 192104C, 192105BA, F16D 1308, F16D 4318
Patent
active
046730737
ABSTRACT:
A normally engaged wrap spring clutch includes a helical spring which normally is wrapped down on the outer surfaces of aligned input and output hubs to couple the latter. One end of the spring is anchored on the input hub and the other end is secured to a control collar which is telescoped over the spring so that, by turning the control collar relative to the input hub, the spring is unwrapped from the surfaces of the hubs to disengage the clutch. Pins project longitudinally into radial slots in the input hub and spiral slots in the control collar and have substantial mass so that, when the input hub reaches a preselected speed, the pins move radially outward under centrifugal force and, through a camming action in the spiral grooves, turn the control collar relative to the input hub thereby unwrapping the spring. In an alternative embodiment, the outwardly moving pins turn the control collar to cause the spring to wrap down and cause engagement of a normally disengaged clutch.
REFERENCES:
patent: 1917484 (1933-07-01), Banker
patent: 1972915 (1934-09-01), Barton
patent: 3262533 (1966-07-01), Keller et al.
patent: 3625326 (1971-12-01), Rix et al.
patent: 3648810 (1972-03-01), Weatherby
patent: 3724622 (1973-04-01), Barbulesco et al.
patent: 3727738 (1973-04-01), Briar
patent: 3915268 (1975-10-01), MacDonald
patent: 4321992 (1982-03-01), Gallo
patent: 4440280 (1984-04-01), Hagihara
patent: 4494637 (1985-01-01), Gotoda et al.
Bonck Rodney H.
Lorence Richard M.
Warner Electric Brake & Clutch Company
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