F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
74/134
F16H 37/06 (2006.01) B23Q 5/14 (2006.01) B23Q 5/22 (2006.01)
Patent
CA 1264965
ABSTRACT OF THE DISCLOSURE High-low speed drive system includes a main drive shaft which may be selectively driven off one or the other of a pair of continuously driven high and low speed shafts by selective engagement and disengage- ment of associated pneumatic operated disc clutches. Such clutches have fast response times, and the clutch associated with the low speed shaft acts as a brake when engaged to rapidly decelerate the main drive shaft down to the speed of the low speed shaft. The timing of both the high speed and low speed pneumatic operated disc clutches are closely controlled so that the low speed clutch is engaged practically instantaneously with the disengage- ment of the high speed clutch. The clutches are located in substantial radial alignment with each other in close proximity to the gear train between the high and low speed shafts and main drive shaft within the main housing for ease of maintenance and simplified porting of fluid through lines on the same path to all of the clutches. If desired, a pneumatic operated disc brake may be provided on the main drive shaft to provide for independent braking or holding of the main drive shaft against rotation during secondary operations upon disengaging both of the high and low speed pneumatic operated disc clutches and engaging the main drive shaft pneumatic operated disc brake.
515901
Leggett & Platt Incorporated
Swabey Ogilvy Renault
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