192 clutches and power-stop control – Clutches – Automatic
Patent
1992-03-05
1993-11-02
Bonck, Rodney H.
192 clutches and power-stop control
Clutches
Automatic
74 7C, 192 42, 192104C, F16D 4112, F16D 4304, F02N 1500
Patent
active
052576850
ABSTRACT:
A pneumatic starter (10) incorporates a pawl and ratchet clutch assembly (50) having a ratchet member (46) mounted to a drive member (40) powered by an air expansion turbine (20), and a plurality of pawls (48) disposed circumferentially about the ratchet member (46) and operable in engagement therewith to transmit rotational drive torque from the drive member (40) to a driven member (60). Each of the pawls (48) is supported on a pivot pin (54) for pivotal movement into and out of engagement with the ratchet member (46) and translation between a engaged and drive position and a disengaged and retracted position to effectuate a change in the location of the center of gravity (93) of the pawl relative to its pivot axis (55). Preload springs (54) are provided for biasing the pawls (48) to pivot radially inwardly into engagement with the ratchet member (46). A torsion spring (82) is disposed in operative association with each pawl (48) for shifting its associated pawl from its engaged and drive position to its disengaged and retracted position upon lift-off of the pawl from the ratchet member.
REFERENCES:
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patent: 2028441 (1936-01-01), Decker
patent: 2054747 (1936-09-01), Green et al.
patent: 3236348 (1966-02-01), Okcuoglu
patent: 3727733 (1973-04-01), Mrazek
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patent: 4187728 (1980-02-01), Mazzorana
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patent: 4914906 (1990-04-01), Burch
patent: 4926631 (1990-05-01), Sorenson
Telakowski Robert
Tichiaz Gordon D.
Bonck Rodney H.
Habelt William W.
United Technologies Corporation
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