192 clutches and power-stop control – Clutches – Fluent material
Patent
1990-12-26
1992-04-07
Braun, Leslie A.
192 clutches and power-stop control
Clutches
Fluent material
123 4112, F16D 3500
Patent
active
051019507
ABSTRACT:
A fluid coupling device is provided of the type including a housing member (15) and a cover member (17), and a valve plate (31) disposed therebetween to define a fluid operating chamber (33) and a fluid reservoir chamber (35) containing fluid defining a fluid level (F), when the device is shutdown in the disengaged condition. The valve plate defines a discharge opening (47) through which fluid is pumped from the operating chamber back into the reservoir. In accordance with the invention, the cover member (17') defines an annular groove (57; 57'), including a upstream portion (59; 59'), and the cover defines a downstream portion (67; 67') in open communication between the annular groove and the reservoir. The circumferential extent of the annular groove is at least about 180 degrees, such that either the upstream portion or the downstream portion is above the fluid level for any rotational orientation of the device. The invention prevents bleedback of fluid into the operating chamber during shutdown, and substantially eliminates the problem of "morning sickness", and the related undesirable noise.
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Four Photographs of Nissan Motorcar Company's Part #21082-88G00.
Braun Leslie A.
Eaton Corporation
Kasper L. J.
Whitelaw Nicholas
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