Fluid handling – Systems – Multi-way valve unit
Patent
1990-04-03
1991-07-16
Michalsky, Gerald A.
Fluid handling
Systems
Multi-way valve unit
1376253, 13762561, 13762569, F15B 13043
Patent
active
050316630
ABSTRACT:
A pressure control valve delivers a pressure which is proportional to a current level chosen to energize a solenoid therein to a shock absorber of a suspension. A spool in the valve has an annular groove for communicating an output port to a high pressure port or a low pressure port selectively. There are conical surfaces or inclined surfaces at edges of lands adjacent to the groove, which incline from annular surfaces of the lands toward the bottom of the groove. The inclined surfaces slow down a change of the flow rate from the high pressure port to the output port and from the output port to the low pressure port when the annular groove communicates with the high pressure port and the low pressure port respectively.
REFERENCES:
patent: 3556155 (1971-01-01), McWilliams et al.
patent: 4155535 (1979-05-01), Seamone
patent: 4245816 (1981-01-01), Johnson
patent: 4527592 (1985-07-01), Dotti et al.
patent: 4590968 (1986-05-01), Wolfges
Fukuta Masahiro
Ikemoto Hiroyuki
Komazawa Osamu
Matsuda Shinji
Onuma Toshio
Aisin Seiki Kabushiki Kaisha
Michalsky Gerald A.
Toyota Jidosha & Kabushiki Kaisha
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