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
Method of improving sensitivity and interference rejection in wireless receivers
Biaxially oriented film which could be thermally laminated with paper and other substrates
Plants and seeds of corn variety CV335662
Conductor for transmitting electrical power
Lifting apparatus
Apparatus for tuning a musical instrument, and a related instrument
Method and system for facilitating micropayments in a financial transaction system
  Randomly Featured Patents
Arrangement and method for continuous cooling of food products
Electron source manufacturing method, and image forming apparatus method
Device for metering a pastry product
Reel for fishing
Compounds and methods of use to derivatize neighboring lysine residues in proteins under physiological conditions
Portable telephone system and control method therefor
Stator coil cooling and method of manufacturing
Bird feeder
Multi-bit nonvolatile memory device and related programming method
Pneumatic hand tool