Fluid control valve for a hydraulic system operating with variab

Fluid handling – Pressure modulating relays or followers – With counter-balancing pressure feedback to the modulating...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

1371163, 137468, 1376252, 13762545, 13762565, G05D 1620

Patent

active

054996503

ABSTRACT:
Problems such as slow frequency response and low reliability when operating with contaminated fluids of variable viscosity are alleviated in a low pressure hydraulic system (10) which utilizes a single stage, electro-hydraulic, clevis-type pressure control valve (40). The valve (40)includes a control piston (106) referenced to a control pressure within a control pressure cavity (60) to provide a feedback of control pressure which converts the valve (40) from an integral to a proportional control device, thereby enhancing stability of the hydraulic system (10). Compensation for changes in fluid viscosity, as a result of changes in fluid temperature, is provided by fabricating a bifurcated portion (98) and/or a metering bridge portion (62) of the valve (10) from materials having dissimilar coefficients of thermal expansion. Exemplary embodiments of a hydraulic system (10) suitable for use in either vehicular or stationary applications involving pressure actuated devices, such as a clutch (16), automatic transmissions or anti-lock brakes, are provided.

REFERENCES:
patent: 1763994 (1930-06-01), Thoma
patent: 3081787 (1963-03-01), Meuledyk
patent: 3234967 (1966-02-01), Munn
patent: 3583430 (1971-06-01), Toennesen
patent: 3805835 (1974-04-01), Jansen
patent: 4046061 (1977-09-01), Stokes
patent: 4071042 (1978-01-01), Lombard
patent: 4773439 (1988-09-01), Coates-Smith
patent: 4949752 (1990-08-01), Nogle et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Fluid control valve for a hydraulic system operating with variab does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fluid control valve for a hydraulic system operating with variab, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluid control valve for a hydraulic system operating with variab will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1954119

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.