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Class Information
Number: 251/63.5
Name: Valves and valve actuation > Fluid actuated or retarded > Piston type expansible chamber reciprocating valve actuator > Coaxial actuator, seat and valve
Description: Subject matter in which the movable control member, the seat or port for such member, the cylinder of the expansible chamber device and the piston relatively movable therein are positioned and aligned along the same axis.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4694730 |
Prop control valve |
Sep. 22, 1987 |
| 4688754 |
End assembly for control valves |
Aug. 25, 1987 |
| 4687017 |
Inverted bellows valve |
Aug. 18, 1987 |
| 4682756 |
Hydraulically operated self-closing two-way seat-type valve |
Jul. 28, 1987 |
| 4673162 |
High-pressure self-actuating flow-control valve assembly |
Jun. 16, 1987 |
| 4662603 |
Piloted wellhead flow control valve |
May. 5, 1987 |
| 4657224 |
Pneumatically actuated valve |
Apr. 14, 1987 |
| 4650151 |
Subsea gate valve actuator with external manual override and drift adjustment |
Mar. 17, 1987 |
| 4643219 |
Valve for regulating the passage of a fluid |
Feb. 17, 1987 |
| 4639196 |
Fluid control valve |
Jan. 27, 1987 |
| 4637419 |
Subsea control pod valve assembly |
Jan. 20, 1987 |
| 4615354 |
Valve system timing device for pipes carrying liquid under pressure |
Oct. 7, 1986 |
| 4596267 |
Piston-driven valves |
Jun. 24, 1986 |
| 4582082 |
Piston-driven valves |
Apr. 15, 1986 |
| 4562862 |
Hydraulically unblockable non-return valve |
Jan. 7, 1986 |
| 4553564 |
Valve |
Nov. 19, 1985 |
| 4526341 |
Pneumatic shut-off valve |
Jul. 2, 1985 |
| 4525183 |
Valves for desiccant dryers |
Jun. 25, 1985 |
| 4522370 |
Valve |
Jun. 11, 1985 |
| 4520846 |
Valve |
Jun. 4, 1985 |
| 4519574 |
Auxiliary controlled valve disposed in a drilling string |
May. 28, 1985 |
| 4515344 |
Blocking valve |
May. 7, 1985 |
| 4504038 |
Valve actuator |
Mar. 12, 1985 |
| 4494560 |
Self-priming system for liquid pumps |
Jan. 22, 1985 |
| 4475883 |
Pressure control for steam generator |
Oct. 9, 1984 |
| 4462566 |
Pressure compensated flow control system |
Jul. 31, 1984 |
| 4461449 |
Integral hydraulic blocking and relief valve |
Jul. 24, 1984 |
| 4461450 |
Remote control choke |
Jul. 24, 1984 |
| 4461451 |
Slide valve for container of bulk material |
Jul. 24, 1984 |
| 4460324 |
Shot cylinder controller for die casting machines and the like |
Jul. 17, 1984 |
| 4442999 |
Reinforced plug for flow regulators |
Apr. 17, 1984 |
| 4442859 |
Control valve |
Apr. 17, 1984 |
| 4420044 |
Flow control system |
Dec. 13, 1983 |
| 4391293 |
Packing for equalizing reservoir cut-out valve |
Jul. 5, 1983 |
| 4389984 |
Post-shutdown coolant-supply device |
Jun. 28, 1983 |
| 4365754 |
Spray assembly construction |
Dec. 28, 1982 |
| 4354661 |
Constant velocity diffuser |
Oct. 19, 1982 |
| 4351510 |
Flow regulator assembly |
Sep. 28, 1982 |
| 4345623 |
Multiport disk valve, especially for dust-remover duct systems |
Aug. 24, 1982 |
| 4340081 |
Irrigation valve apparatus |
Jul. 20, 1982 |
| 4336826 |
Control valve |
Jun. 29, 1982 |
| 4335744 |
Quiet safety relief valve |
Jun. 22, 1982 |
| 4305418 |
Fluid flow control valve |
Dec. 15, 1981 |
| 4285495 |
Safety valve |
Aug. 25, 1981 |
| 4279402 |
Explosion barring shutoff device |
Jul. 21, 1981 |
| 4271860 |
Valve |
Jun. 9, 1981 |
| 4266574 |
Vent valve |
May. 12, 1981 |
| 4214606 |
Subsurface safety valve |
Jul. 29, 1980 |
| 4206902 |
Inner element for a flow regulator |
Jun. 10, 1980 |
| 4180239 |
Metering valves |
Dec. 25, 1979 |
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