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Class Information
Number: 251/210
Name: Valves and valve actuation > Sequential opening or closing of serial ports in single flow line (e.g., anti-scoring)
Description: Devices in which a single flow line has a plurality of serially associated flow controlling positions which are sequentially closed or opened by a valve unit.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4540022 |
Choke for drilling or production use |
Sep. 10, 1985 |
| 4531545 |
Drilling choke valve |
Jul. 30, 1985 |
| 4529168 |
Double shut-off valve which provides perfectly tight sealing |
Jul. 16, 1985 |
| 4508138 |
Polyjet valve with backwash |
Apr. 2, 1985 |
| 4506859 |
Device for controlling a connection between a pressure medium source and a fluid supply container in a pressure medium operated system |
Mar. 26, 1985 |
| 4493338 |
Washerless faucet |
Jan. 15, 1985 |
| 4478251 |
Orifice fitting seal assembly |
Oct. 23, 1984 |
| 4460014 |
Non-mixing valve |
Jul. 17, 1984 |
| 4449547 |
Long life gate valve |
May. 22, 1984 |
| 4442863 |
Fluid line coupling device |
Apr. 17, 1984 |
| RE31417 |
Sealing system for shutoff elements |
Oct. 18, 1983 |
| 4402340 |
Pressure-responsive shut-off valve |
Sep. 6, 1983 |
| 4377273 |
Gate valve having a secondary seal |
Mar. 22, 1983 |
| 4375821 |
Control value |
Mar. 8, 1983 |
| 4355784 |
Method and apparatus for controlling back pressure |
Oct. 26, 1982 |
| 4354663 |
Valve construction for sand and slurry service |
Oct. 19, 1982 |
| 4332267 |
Ball valve assembly |
Jun. 1, 1982 |
| 4330011 |
Faucet valve with early shutoff |
May. 18, 1982 |
| 4315616 |
Dump valve |
Feb. 16, 1982 |
| 4304393 |
Gate valve to shut off flow of liquid in pipelines |
Dec. 8, 1981 |
| 4280678 |
Bleed valve |
Jul. 28, 1981 |
| 4280680 |
Fluid valves |
Jul. 28, 1981 |
| 4270356 |
Turbocharged engine and method of operating same |
Jun. 2, 1981 |
| 4249717 |
Seal for a liquid valve |
Feb. 10, 1981 |
| 4244398 |
Check valve assembly having valve opening prior to passing flow and flow shut off prior to valve closing |
Jan. 13, 1981 |
| 4239061 |
Damper valve |
Dec. 16, 1980 |
| 4232695 |
Fluid control valve and method |
Nov. 11, 1980 |
| 4231547 |
Dispensing valve for liquids |
Nov. 4, 1980 |
| 4228987 |
Valve arrangement |
Oct. 21, 1980 |
| 4211386 |
Slow opening cylinder valve |
Jul. 8, 1980 |
| 4188013 |
Gas valve seating member |
Feb. 12, 1980 |
| 4146050 |
Plastic lined sample valve |
Mar. 27, 1979 |
| 4132386 |
Valve mechanism for a control valve |
Jan. 2, 1979 |
| 4130611 |
Attemperator |
Dec. 19, 1978 |
| 4119296 |
Valve with enclosed soft tip stem |
Oct. 10, 1978 |
| 4109675 |
Relief valve |
Aug. 29, 1978 |
| 4070005 |
Valve having an improved seat |
Jan. 24, 1978 |
| 4023466 |
Apparatus for regulating the speed of and the pressure of fluid upon the ram in the injection assembly of an injection molding machine |
May. 17, 1977 |
| 4009861 |
Step opening gas valve |
Mar. 1, 1977 |
| 3991973 |
Cartridge valve with multiple shut-off |
Nov. 16, 1976 |
| 3986699 |
Positive shut-off seal |
Oct. 19, 1976 |
| 3963049 |
Dual sealing solenoid valve |
Jun. 15, 1976 |
| 3960364 |
High pressure tight shutoff valve seal |
Jun. 1, 1976 |
| 3952994 |
Throttling and shut-off valve |
Apr. 27, 1976 |
| 3945390 |
Sealing system for shutoff elements |
Mar. 23, 1976 |
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