Invention Grant
- Patent Title: Proportional fluid flow control valve configured to generate a pressure-boosted pilot fluid signal
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Application No.: US16246924Application Date: 2019-01-14
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Publication No.: US10648488B1Publication Date: 2020-05-12
- Inventor: Bernd Zähe
- Applicant: Sun Hydraulics, LLC
- Applicant Address: US FL Sarasota
- Assignee: Sun Hydraulics, LLC
- Current Assignee: Sun Hydraulics, LLC
- Current Assignee Address: US FL Sarasota
- Agency: McDonnell Boehnen Hulbert & Berghoff LLP
- Main IPC: F15B13/01
- IPC: F15B13/01 ; F15B11/00 ; F15B11/10 ; F15B13/043 ; F16K31/40 ; F15B13/042

Abstract:
An example valve includes: a piston movable between a neutral position and an actuated position, wherein in the neutral position: a second port of the valve is fluidly coupled to a first port, and a third port is fluidly decoupled from the second port; a solenoid actuator sleeve movable between an unactuated state and an actuated state, wherein in the actuated state, the solenoid actuator sleeve allows pilot fluid to apply a fluid force on a piston in a distal direction; a first feedback spring; and a second feedback spring disposed in series with the first feedback spring, wherein the first feedback spring and the second feedback spring cooperate to apply a biasing force in a proximal direction on the piston against the fluid force, wherein the piston is configured to move to the actuated position based on a relationship between the fluid force and the biasing force.
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