US 11,852,259 B2
Proportional solenoid valve having zero current during intermittent state hold conditions
Brandon Tarr, State College, PA (US)
Assigned to RESTEK CORPORATION, Bellefonte, PA (US)
Appl. No. 17/434,168
Filed by RESTEK CORPORATION, Bellefonte, PA (US)
PCT Filed Feb. 28, 2020, PCT No. PCT/US2020/020318
§ 371(c)(1), (2) Date Aug. 26, 2021,
PCT Pub. No. WO2020/176837, PCT Pub. Date Sep. 3, 2020.
Claims priority of provisional application 62/811,958, filed on Feb. 28, 2019.
Prior Publication US 2022/0146012 A1, May 12, 2022
Int. Cl. F16K 31/06 (2006.01); F16K 31/524 (2006.01); F16K 35/16 (2006.01)
CPC F16K 31/0668 (2013.01) [F16K 31/52475 (2013.01); F16K 35/16 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A proportional solenoid, capable of linear motion, comprising:
an electromagnetic valve device including
a solenoid assembly having a mobile core,
a push rod connecting the mobile core to a valve plunger, and
a device operable to apply a controlled friction force to hold the mobile core in an intermediate position, wherein the friction force is greater than motive forces generated by the solenoid assembly,
wherein the intermediate position may be any position between completely open and completely closed as set via proportional current, the proportional current being a magnitude of current proportional to a distance for the mobile core to reach the intermediate position.