Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Engineering
Class Information
Number: 137/253
Name: Fluid handling > With liquid valves or liquid trap seals > Liquid valves > With auxiliary means for varying liquid level
Description: Apparatus including auxiliary means independent of the flow path for adjusting or varying the height of the liquid in the valve.










Patents under this class:

Patent Number Title Of Patent Date Issued
8607813 Method for reducing the air feed from the atmosphere into the expansion vessel of high-voltage systems filled with insulating liquid and device for carrying out the method Dec. 17, 2013
7591278 Sewer system vent monitor Sep. 22, 2009
7523792 Method and apparatus for shifting speeds in a fluid-actuated motor Apr. 28, 2009
4809537 System and method for monitoring wet bulb temperature in a flue gas stream Mar. 7, 1989
4800914 Gas pressure relief apparatus Jan. 31, 1989
4800596 Ventilated toilet Jan. 31, 1989
4793952 Interface control apparatus Dec. 27, 1988
4773441 Liquid seal vent Sep. 27, 1988
4562724 Gas sampling valve Jan. 7, 1986
4412477 Arrangement to counteract or prevent spreading of fire or smoke Nov. 1, 1983
4411286 Liquid seal valve Oct. 25, 1983
4294165 Arrangement to counteract or prevent spreading of fire or smoke Oct. 13, 1981
4222405 Pressure vacuum breaker Sep. 16, 1980
4199008 Wet sealed standpipe cap Apr. 22, 1980
4022240 Slide valve sealant system May. 10, 1977
3961641 Liquid seal for preventing pneumatic back flow Jun. 8, 1976
3933168 Liquid closure device Jan. 20, 1976











 
 
  Recently Added Patents
Sensor interface engineering
Container
Serving base station selection based on backhaul capability
End to end email monitor
Process for preparation of Efavirenz
Polypeptides having beta-glucosidase activity and beta-xylosidase activity and polynucleotides encoding same
Antibodies to non-functional P2X.sub.7 receptor
  Randomly Featured Patents
Unipolar drive for cholesteric liquid crystal displays
Soldered joint
Device for fastening a lock module on a vehicle door
Electric motor
Distributed redirect server
Scanning-based detection of ionizing radiation
Weapon launched reconnaissance system
Process and apparatus for the repair of damaged roads
Method and terminal for providing a route in a navigation system using satellite image
Disk apparatus