Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems
Patent
1985-09-10
1986-05-27
Schwadron, Martin P.
Fluid handling
Self-proportioning or correlating systems
Self-controlled branched flow systems
137494, F16K 1704
Patent
active
045909580
ABSTRACT:
The invention relates to a two-position switching valve having hydraulic f-holding properties and comprising a closure piston disposed in a flow path for displacement between an open position and a closure position for controlling a pressure between a maximum value and a minimum value, and operatively coupled to a control piston mounted for displacement in a housing. In known switching valves of this type, a creeping approach of respective switching points is scarcely avoidable under certain operating conditions. In accordance with the invention, a reliable switching function is achieved by forming the housing bore as a continuous stepped bore for slidably guiding therein a stepped piston consisting of a closure piston, a control piston, and a piston portion and by providing alternately openable and closable flow connections therein permitting an annular space between the closure piston and the piston portion to communicate with an annular chamber adjacent the control piston in the closure position of the closure piston, and the annular chamber to be pressure-relieved in the open position of the closure piston. These provisions result in the generation of a servo force for abrupt switch-over operation of the valve.
REFERENCES:
patent: 2316445 (1943-04-01), Marshall
patent: 2680447 (1954-06-01), Groves
patent: 3922954 (1975-12-01), Gustafsson et al.
Heilmeier & Weinlein Fabrik Fur Oel-Hydraulik GmbH & Co. KG
Hepperle Stephen M.
Schwadron Martin P.
LandOfFree
Two-position switching valve having hydraulic self-holding prope does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Two-position switching valve having hydraulic self-holding prope, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-position switching valve having hydraulic self-holding prope will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1566691