Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Engineering
Class Information
Number: 137/304
Name: Fluid handling > Hydrant type > Protection against freezing > Stop and waste > Separate relatively movable valves with single actuator
Description: Apparatus in which the control valve and the drain valve are relatively movable but are operated by a single actuator.










Sub-classes under this class:

Class Number Class Name Patents
137/305 Unidirectional abutting connection between main valve or actuator and waste valve 4
137/306 With screw or gear in actuating mechanism 0


Patents under this class:

Patent Number Title Of Patent Date Issued
8640728 Fire hydrant control valve Feb. 4, 2014
5901738 Portable fire hydrant May. 11, 1999
4307746 Frost-proof fire hydrant Dec. 29, 1981











 
 
  Recently Added Patents
Specimen preparation device, and control method in specimen preparation device
Surveillance apparatus and method for wireless mesh network
Mechanical and moisture protection apparatus for electronic devices
Solid-state image pickup element, method of manufacturing the same, and image pickup apparatus including the same
Veronica plant named `Amethyst Plume`
Automatic detection of image degradation in enhanced vision systems
Light emitting diode package and method of fabricating the same
  Randomly Featured Patents
Safety razors
Chair
Apparatus and method for managing integrated circuit designs
Chlorine containing plasma etch method with enhanced sidewall passivation and attenuated microloading effect
Semiconductor neural network and operating method thereof
Video camera with slower than standard read-out from CCD
Reflective panel for wireless applications
Tool head for dentistry handpieces and the method of embodying such a head
Die cut lock tray
Unsaturated 1,3-dioxolane stabilized with aliphatic aldehyde hydrazone