Machine element or mechanism – Gearing – Plural power paths to and/or from gearing
Patent
1985-09-18
1987-02-24
Braun, Leslie
Machine element or mechanism
Gearing
Plural power paths to and/or from gearing
74665A, 74665G, 74665P, 82 28R, 192 489, 192 8715, F16H 3706
Patent
active
046448195
ABSTRACT:
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 disengagement 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 disengagement 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 third pneumatic operated disc clutch 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 clutch.
REFERENCES:
patent: 3090267 (1963-05-01), Trumpp
patent: 3103838 (1963-09-01), Beacom et al.
patent: 3385145 (1968-05-01), Jacoby
patent: 3864994 (1975-02-01), White
patent: 3871246 (1975-03-01), Craven
patent: 4476752 (1984-10-01), Hessbruggen
patent: 4563925 (1986-01-01), Link
Braun Leslie
Diehl Dwight G.
Leggett & Platt Incorporated
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