Machine element or mechanism – Gearing – Plural power paths to and/or from gearing
Patent
1976-07-09
1977-11-15
Herrmann, Allan D.
Machine element or mechanism
Gearing
Plural power paths to and/or from gearing
180 44R, 192 35, 192 57, 192 58B, 192 58C, 192 82T, 192107C, F16H 144, F16D 3500, F16D 4325
Patent
active
040580270
ABSTRACT:
A coupling for controlling or limiting the angular velocity or angular acceleration between first and second rotatable members. The coupling has an enclosure containing viscous liquid in which first and second sets of interleaved elements and third and fourth sets of interleaved elements are arranged for rotation about a common axis. The first and third sets of elements have driving connections with the first rotatable member and the second and fourth sets of elements have driving connections with the second rotatable member. Spacing means are provided to space apart the facing surfaces of adjacent elements of at least one of said first and second sets and also at least one of said third and fourth sets so that the facing surfaces of adjacent elements of each spaced set are spaced apart by distances greater than the thicknesses of the portions of the elements of the other set interleaved between said facing surfaces. The spacing means provided for one or both of the third and fourth sets are resilient. A differential piston is provided which is subject to the pressure in the enclosure and a first spring means urges the piston to a first position in which the facing surfaces of adjacent elements of the or each spaced set of the third and fourth sets are spaced apart by distances greater than the thicknesses of the portions of the elements of the other set interleaved between the facing surfaces. The coupling is arranged so that as the pressure of the liquid in the enclosure increases the piston moves against the first spring means to cause an abutment carried by the piston to compress the resilient spacing means and bring the elements of the third and fourth sets into mutual clutching engagement.
REFERENCES:
patent: 3211022 (1965-10-01), Anderson
patent: 3760922 (1973-09-01), Rolt
patent: 3869940 (1975-03-01), Webb
patent: 3923113 (1975-12-01), Pagdin
GKN Transmissions Limited
Herrmann Allan D.
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