Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Engineering
Class Information
Number: 137/46
Name: Fluid handling > Control by change of position or inertia of system > By pendulum or swinging member > With servo connection to valve
Description: Apparatus in which the pendulum or pivoted member controls the application of another source of power for operating the control instead of by acting directly through a mechanical connection.










Patents under this class:

Patent Number Title Of Patent Date Issued
8500999 System for water treatment regeneration stage Aug. 6, 2013
7152615 Earthquake actuated horizontal valve with micro switch Dec. 26, 2006
5271425 Valve closing apparatus responsive to movement Dec. 21, 1993
4979528 Gas actuated valve system Dec. 25, 1990
4920999 Air actuated valve system with seismic controller May. 1, 1990
4852600 Air actuated valve system with seismic controller Aug. 1, 1989
4587859 Seismic trigger May. 13, 1986
4545203 Hydrostatic drive units Oct. 8, 1985
4531533 Seismic trigger Jul. 30, 1985
4201536 Vibration responsive mechanism May. 6, 1980
4094332 Earthquake-responsive fuel shut-off device Jun. 13, 1978
3938538 Control valve apparatus Feb. 17, 1976











 
 
  Recently Added Patents
Processor and data transfer method
Sporting goal practice screen
Clock face
Contact sensor, driver device, and care bed
Hard disk drives having different rotational speeds
Method of manufacturing III-nitride crystal
Method and system for enabling rendering of electronic media content via a secure ad hoc network configuration utilizing a handheld wireless communication device
  Randomly Featured Patents
Dentifrice composition
Ultralight soundproof material
Thermal physical vapor deposition apparatus with detachable vapor source(s) and method
Method and apparatus for cleaning and drying substrates
Load-reducing rocket nozzle operation method
Dismountable image forming cartridge, and a corresponding image forming apparatus and method
Cord reel
One way free spinning hubcap
Current drive circuit and display device using same, pixel circuit, and drive method
Combined electroporation and microinjection method for the penetration of lipid bilayer membranes