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Class 251/190 - Piston


Subclass of Class 251 - Valves and valve actuation
Definition: Subject matter wherein the valve is of the piston type.
No. of patents: 10
Last issue date: 05/08/2007


NumberTitleIssue Date
7213787Valves for annular conduits including aircraft fuel conduits and associated systems and methods
Valves for annular conduits and associated systems and methods are disclosed. A fluid transmission system in accordance with one embodiment of the invention includes a first conduit having a first wall aligned with a flow direction in the first conduit and a second ...
05/08/2007
7048004Valve system
The invention relates to a valve system (1) with at least one valve body (2) and a longitudinal slide (3) slidably dispsoed therein which establishes or disrupts a connection between a feed line (4) and at least one inlet (5, 6) or...
05/23/2006
6776392Retractable plug assembly
A retractable plug assembly for engaging a seat ring seating surface comprises a plug housing, a plug body, a retainer ring, a wear ring, a spring retainer and a valve spring. The plug housing has the plug body slidably disposed therewithin and defines a plug body s...
08/17/2004
6510867Pressure relief valve
A pressure relief valve has a main valve body, a fluid inlet passageway, a fluid outlet passageway, and a piston contained within the main body. The piston has a piston head, slidingly and sealingly engaged within a pressurized cavity in the main valve bo...
01/28/2003
6102366Balanced valve operated by the axial driving of a stem displacing a special elastomeric sealing body
A balanced valve for flows operated by the axial driving of a stem which commands a sealing body liable to axially slip between an opened position far from the valve seat and a closed seal in contact with the valve s eat. The valve basically consists in a...
08/15/2000
5992446Stopper system for vessel orifice
The combination of a vessel and a stopper assembly. The vessel has a wall defining a storage space for a supply of a flowable material and an orifice on the wall communicating through the body from the storage space to externally of the storage space. The...
11/30/1999
5722637Seals
A balance seal for a valve, said seal comprising an annular seal element retained within a valve housing. The seal element has a seal well which links with the pressure on one side of the valve to urge a flexible seal leg with a foot into engagement with ...
03/03/1998
4892287Valve body with a housing having a cylindrical flow passage
A valve piston (1) is axially movably arranged in a valve housing (8) having a cylindrical flow passage. A circumferential groove (2) of the piston (1) carries a sealing ring (3) for separating a high pressure side (H) from a low pressure side (L) of the ...
01/09/1990
4364362Metering and distribution valve assembly
A metering and distribution valve assembly is proposed for a fuel injection system of an internal combustion engine. The metering and distribution valve assembly includes a control slide having a head 68 and a control edge and a slotted sleeve with at lea...
12/21/1982
3934813Concrete pump valve
A valve for a concrete pump having a front valve closing portion which in the closed position prevents flow through a T-pipe section, a supporting structure secured to the T-pipe section and an annular sealing band carried by the supporting structure and ...
01/27/1976
 
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