Machine element or mechanism – Power take-off – With independent change speed gearing
Patent
1980-10-22
1984-08-28
Dorner, Kenneth
Machine element or mechanism
Power take-off
With independent change speed gearing
74 156, 74770, 192 56F, F16H 5710, F16D 4320
Patent
active
044676638
ABSTRACT:
An overload coupling includes at least one latch plunger housed in a holder or in a coupling member, fits in a recess of a second member to establish connection. The plunger has or is part of a hydraulic system and can be forced out of the recess upon overload against the hydraulic pressure in the system and, in some instances, with the aid of centrifugal forces. The plunger and holder can be part of a unit that is releasably fastened in the coupling member and set to trip upon torque exceeding a predetermined level on the coupling member. Also, the plunger can have internal ducts or external conduits that include a pressure relief valve, as well as a spring return, which can effect connection upon reduced speed when centrifugal force factors are reduced. The pressure in the system can be set remotely with a piston that is spring loaded. In one variation, the coupling can be within a planetary gear system that establishes driving connection from an input to an output via planetary and sun gears. Thus, the planetary gears can be mounted on a carrier that can be held by a plunger to drive a p.t.o. shaft. Two sets of planetary gears can be mounted within the gear housing to drive the p.t.o. shaft at different speeds and a common plunger used to establish either connection. As part of the system, a distributor can selectively engage either system and a switching member set to allow fluid to pressure the system to a predetermined level.
REFERENCES:
patent: 2718160 (1955-09-01), McIntyre
patent: 3511349 (1970-05-01), Herscovic
patent: 3807539 (1974-04-01), Reed
patent: 4015486 (1977-04-01), Zach, Jr.
Albright Penrose Lucas
Dorner Kenneth
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