192 clutches and power-stop control – Clutches – Operators
Patent
1979-06-01
1981-10-27
Bonck, Rodney H.
192 clutches and power-stop control
Clutches
Operators
192 89B, 1921061, F16D 300, F16D 2710
Patent
active
042968518
ABSTRACT:
An electromagnetic clutch for transmitting driving torque from one rotatable element to another having particular utility for driving a vane-type compressor used in an automotive air conditioning system in a manner to reduce the cost of such clutches as well as the axial length and weight. The clutch includes a rotatably driven pulley assembly connected to a hub affixed to the input drive shaft of the compressor through an armature disk and friction face on the pulley assembly by selectively energizing and deenergizing a magnetic coil with the armature disk being connected to the hub through a plurality of curved leaf springs and a plurality of drive keys received in recesses or notches with the curved springs replacing the normal flat springs which are used to support the armature disk with the curved springs including a linear flexibility and axial flexibility. The flexibility permits the compressor shaft to yield thereby avoiding binding of the compressor rotor and also provides a significantly shorter clutch assembly by eliminating a rubber "sandwich" hub assembly which is especially important in smaller automobiles and reduces the weight of the clutch by a significant amount. With the drive keys and recesses or notches, there is no restriction to radial or axial deflection, but the drive keys and recesses limits the linear deflection of the springs so that they will not deflect beyond a predetermined point which would cause them to take a permanent set during initial clutch engagement when the clutch torque is extremely high.
REFERENCES:
patent: 2068963 (1937-01-01), Spase
patent: 2080455 (1937-05-01), Bechtel
patent: 2114247 (1938-04-01), Davis
patent: 2141014 (1938-12-01), Nutt
patent: 2407757 (1946-09-01), MacCallum
patent: 3246485 (1966-04-01), Chapman
patent: 3368657 (1968-02-01), Wrensch et al.
patent: 3428155 (1969-02-01), Binder et al.
patent: 3565223 (1971-02-01), Pierce
patent: 3582697 (1971-06-01), Bochan
patent: 3620339 (1971-11-01), Becking
patent: 4243128 (1981-01-01), Shirai
Bonck Rodney H.
Jacobson Harvey B.
Pitts Industries, Inc.
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