Resources Contact Us Home
Browse by Category: Main > Engineering
Class Information
Number: 137/329.03
Name: Fluid handling > With repair, tapping, assembly, or disassembly means > With provision of alternate wear parts > Valve heads and/or seats > Opposite duplicate surfaces of unitary structure > Homogeneous material
Description: Devices relating to an homogeneous material forming the surfaces and their intermediate support.

Sub-classes under this class:

Class Number Class Name Patents
137/329.04 Valve heads 15

Patents under this class:

Patent Number Title Of Patent Date Issued
6401747 Gate valve Jun. 11, 2002
4909272 Gate valve Mar. 20, 1990
4393928 Apparatus for use in rejuvenating oil wells Jul. 19, 1983
4355784 Method and apparatus for controlling back pressure Oct. 26, 1982
4257442 Choke for controlling the flow of drilling mud Mar. 24, 1981
4243067 Ball type check valve Jan. 6, 1981
4190073 Choke for controlling the flow of drilling mud Feb. 26, 1980

  Recently Added Patents
Visual model importation
Method for the hydrolysis of substituted formylamines into substituted amines
Method and system for video parameter analysis and transmission
1,3-diiodohydantoin compound and production method thereof
Lubricating oil compositions
Snap-engagement structure
Light-emitting diode package and method for manufacturing the same
  Randomly Featured Patents
Lock system for vehicles and the like
Controller for car toy
Hot stamp tape
Anti-balling snow plate for an ice crampon
Airbag apparatus
Clock extraction circuit
Membrane Na.sup.+ channel protein and related therapeutic compounds
Locking means, and more particularly a lock for a bicycle