Invention Grant
- Patent Title: Proportional flow control and counterbalance valve having single seat configuration
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Application No.: US16442880Application Date: 2019-06-17
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Publication No.: US10969801B2Publication Date: 2021-04-06
- 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: F16K31/06
- IPC: F16K31/06 ; G05D7/06 ; F16K11/07 ; F16K15/04 ; F16K31/122 ; F15B13/042

Abstract:
An example valve includes: a first port configured to be fluidly coupled to an actuator; a second port configured to be fluidly coupled to a reservoir; a third port configured to provide an output pilot fluid signal and receive an input pilot fluid signal; a fourth port configured to be fluidly coupled to a source of fluid; a pilot poppet configured to be subjected to a first fluid force of fluid received at the first port and configured to be subjected to a second fluid force of the input pilot fluid signal; a solenoid actuator sleeve that is axially movable between an unactuated state and an actuated state; and at least one setting spring configured to apply a biasing force on the pilot poppet.
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