Control couplings
AssigneeGKN Transmissions Limited
InventorOswald Webb
Life of this patent
Estimating the term…
Abstract
A control coupling in which an enclosure houses first and second sets of mutually interleaved elements in a viscous liquid. The first and second sets of elements are arranged for rotation about a common axis and for driving connection with first and second rotatable members respectively. A clutch is provided outside the enclosure and resilient means are arranged to urge the clutch into a disengaged state. A pressure responsive means which is in communication with the enclosure is arranged to engage the clutch against the action of the resilient means when the pressure in the liquid in the enclosure attains a predetermined level.
Claims11
A control coupling comprising a liquid-tight enclosure, first and second sets of mutually interleaved elements within said enclosure and arranged for rotation about a common axis, a viscous liquid within said enclosure, said liquid being in contact with adjacent working surfaces of said elements, said first and second sets of elements being arranged for driving connection with first and second rotatable members respectively, a clutch outside said enclosure, resilient means urging said clutch to a disengaged state and pressure responsive means in communication with said enclosure and arranged to directly sense the level of liquid pressure in said enclosure, said pressure responsive means being arranged upon the attainment of a predetermined liquid pressure level in said enclosure to be displaced axially of the coupling by said predetermined pressure level thereby bringing said clutch into engagement against the action of said resilient means.
A control coupling comprising a liquid-tight enclosure having relatively rotatable inner and outer concentric cylindrical walls with two annular end walls extending therebetween, first and second sets of mutually interleaved elements within said enclosure and arranged for rotation about a common axis, said first set of elements being carried by the inner cylindrical wall and said second set by said outer wall, a viscous liquid within said enclosure, said liquid being in contact with adjacent working surfaces of said elements, a clutch outside said enclosure, resilient means urging said clutch to a disengaged state, and one annular end wall of said enclosure being arranged to be slidable between said cylindrical walls upon the attainment of a predetermined liquid pressure level in said enclosure thereby bringing the clutch into engagement against the action of said resilient means.
Dependencies are inferred from the claim text.