Invention Grant
- Patent Title: Pilot operated water valve
- Patent Title (中): 先导式水阀
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Application No.: US12343672Application Date: 2008-12-24
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Publication No.: US08453992B2Publication Date: 2013-06-04
- Inventor: Andrew J. Palmer
- Applicant: Andrew J. Palmer
- Applicant Address: US IL Carol Stream
- Assignee: Robertshaw Controls Company
- Current Assignee: Robertshaw Controls Company
- Current Assignee Address: US IL Carol Stream
- Agency: Reinhart Boerner Van Deuren P.C.
- Main IPC: F16K31/12
- IPC: F16K31/12

Abstract:
A solenoid operated pilot valve utilizes an offset pilot opening and a lever arm to provide a mechanical advantage to multiply the opening force of the solenoid, thereby allowing the solenoid size to be reduced. The lever arm used to position the pilot valving member is mechanically positioned via a solenoid driven plunger in one embodiment, and is positioned by magnetic force alone in an alternative, plungerless embodiment. The lever arm pivots via a fixed fulcrum point, a profiled fulcrum providing continuously variable mechanical advantage, or a stepped fulcrum providing discreet different mechanical advantages as the pilot valving member is moved from its fully closed to its fully opened position.
Public/Granted literature
- US20100155636A1 Pilot Operated Water Valve Public/Granted day:2010-06-24
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