Resources Contact Us Home
Browse by Category: Main > Engineering
Class Information
Number: 137/637.5
Name: Fluid handling > Systems > Valves with separate, correlated, actuators > Coaxial stems > Rotary > Concentric, central valve removable
Description: Subject matter in which a rotary plug valve is within an outer concentric, separately actuated, rotary plug valve and so constructed that the central valve may be removed for repair or other purposes without disturbing the outer valve.

Patents under this class:

Patent Number Title Of Patent Date Issued
7143787 Microluidic valve having two revolving valve elements Dec. 5, 2006
6883541 Manual-automatic water faucet Apr. 26, 2005
4397329 Mixing valve Aug. 9, 1983
4306582 Mixing valve Dec. 22, 1981
4187872 Control valve assembly Feb. 12, 1980
3967535 Uniflow steam engine Jul. 6, 1976

  Recently Added Patents
Adaptive frame scanning scheme for pulsed X-ray imaging
Lithographic apparatus and device manufacturing method
Method of forming solderable side-surface terminals of quad no-lead frame (QFN) integrated circuit packages
Creation and use of test cases for automated testing of media-based applications
Method and apparatus for feeding a polyurethane mixture into hollow bodies
Method and apparatus for detecting and tracking vehicles
  Randomly Featured Patents
N-Benzoyl-N'-halogenoalkylidenehydrazine derivatives, process for preparing same, and agricultural and horticultural fungicide comprising such derivatives
System of photodetection and associated process for analyzing a luminous flux
Faucet spout
Method of photocopying an image onto an edible web for decorating iced baked goods
Ultrasonically generated cavitating or interrupted jet
Pool or spa shade device
Automatic registration of projector images
Displacement sensor
Apparatus for testing different electrical sensors
Method and apparatus for amplifying capacitively coupled inter-chip communication signals