Invention Grant
- Patent Title: Combined check and control valve
- Patent Title (中): 组合式止回阀
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Application No.: US12171143Application Date: 2008-07-10
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Publication No.: US08047502B2Publication Date: 2011-11-01
- Inventor: Holger Paffrath
- Applicant: Holger Paffrath
- Applicant Address: DE Neuss
- Assignee: Pierburg GmbH
- Current Assignee: Pierburg GmbH
- Current Assignee Address: DE Neuss
- Agency: Griffin & Szipl, P.C.
- Priority: DE102007031957 20070710
- Main IPC: F16K31/00
- IPC: F16K31/00

Abstract:
To overcome problems concerning the sticking of the check plate in a combined check and control valve, a stop is provided on the valve rod or a guide element in the vicinity of the valve rod, whose distance to the limiting element is smaller than the maximum stroke and larger than the nominal stroke of the limiting element. Thus, it is achieved that the check plate is released from the valve seat by means of the stop, when the valve rod is displaced to the maximum.
Public/Granted literature
- US20090020724A1 COMBINED CHECK AND CONTROL VALVE Public/Granted day:2009-01-22
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