Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Engineering
Class Information
Number: 137/630.18
Name: Fluid handling > Systems > Sequentially progressive opening or closing of plural valves > Screw-actuated differential valves
Description: Systems in which (1) at least one of the valves is screw actuated and the remaining valve or valves are biased so that as the screw is actuated one of the valves is moved to or from its seated position and further actuation of the screw in the same direction then moves the remaining valve or valves, against the bias, to or from the seated position, or (2) both valves are screw actuated by a common operator and a lost motion connection is provided between the two movable valve elements or between one of the valve elements and its screw actuator.










Patents under this class:

Patent Number Title Of Patent Date Issued
7240694 Flow control valve for refrigeration system Jul. 10, 2007
6957661 Valve with pressurization rate reduction device Oct. 25, 2005
6901962 Surge prevention device Jun. 7, 2005
4266573 Anesthesia machine having proportion limiting control system May. 12, 1981











 
 
  Recently Added Patents
Compositions and methods using microspheres and non-ionic contrast agents
Method for resource allocation in a wireless communication network, method for error-free transmission of information, node and wireless communication network
Liquid crystal display device
System for seeking for an optimal configuration of a bi-, tri- or multi-ventricular cardiac resynchronization implanted device
Viruses lacking epithelial cell receptor entry
Zero-copy network and file offload for web and application servers
Automated measurement of concentration and/or amount in a biological sample
  Randomly Featured Patents
Opto-electric device
Limit stop
Supported carbon-containing molybdenum and tungsten sulfide catalysts, their preparation and use
MU opioid receptor ligands: agonists and antagonists
Turbine-impeller pump for use in geothermal energy recovery systems
Photosensitive elements and their process of use
Pilot operated low pressure shut off valve
Stay cold beverage vessel
Mechanism including two cut-off devices in series
9-Substituted carbacyclin analogs