Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Engineering
Class Information
Number: 137/221
Name: Fluid handling > Larner-johnson type valves; i.e., telescoping internal valve in expanded flow line section > Internal servo-motor with internal pilot valve
Description: Flow control devices in which a controlled motor device comprising a pilot operated or servo-mechanism is involved, the motor device and its pilot or control valve being located within the internal part of the valve, i.e., the part comprising the telescoping support and the needle or movable valve head lying within the flow passage.










Sub-classes under this class:

Class Number Class Name Patents
137/222 Pilot controlled passage in nose or needle 4


Patents under this class:

Patent Number Title Of Patent Date Issued
8656941 Flow control valve Feb. 25, 2014
8353310 Valves having removable internal actuation mechanisms Jan. 15, 2013
8136543 Axial flow control valves having an internal actuator Mar. 20, 2012
8113228 Suction valve Feb. 14, 2012
5417238 Tillage implements May. 23, 1995
5303778 On-off type sprinkler Apr. 19, 1994
4732189 Fast opening valve Mar. 22, 1988
4429709 Cascade-based method and device for fluid handling and measurement Feb. 7, 1984
4254634 Control valve to be employed for refrigerator and air conditioner Mar. 10, 1981
3974849 Diaphragm valves Aug. 17, 1976











 
 
  Recently Added Patents
Image pickup device with a plurality of pixels and an AD conversion circuit
High dynamic range pixel structure
Rotation angle sensor
Linear jet ionizer
System and method for multi-threaded OFDM channel equalizer
Compound semiconductor device and manufacturing method therefor
Collating device, collating method, and program
  Randomly Featured Patents
Method and apparatus for reverse link loading estimation
Rotor of axial gap motor and method of producing same
Short circuit protection for switch mode power supply
Liquid crystal display matrix array employing ovonic threshold switching devices to isolate individual pixels
Method and apparatus for reducing disturbances on an integrated circuit
Switch operating mechanism
Fine granular scalable video with embedded DCT coding of the enhancement layer
Processing apparatus, control method and storage medium
Toy vehicle
Method of steering aquatic vessels