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Class Information
Number: 137/46
Name: Fluid handling > Control by change of position or inertia of system > By pendulum or swinging member > With servo connection to valve
Description: Apparatus in which the pendulum or pivoted member controls the application of another source of power for operating the control instead of by acting directly through a mechanical connection.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7152615 |
Earthquake actuated horizontal valve with micro switch |
Dec. 26, 2006 |
| 5271425 |
Valve closing apparatus responsive to movement |
Dec. 21, 1993 |
| 4979528 |
Gas actuated valve system |
Dec. 25, 1990 |
| 4920999 |
Air actuated valve system with seismic controller |
May. 1, 1990 |
| 4852600 |
Air actuated valve system with seismic controller |
Aug. 1, 1989 |
| 4587859 |
Seismic trigger |
May. 13, 1986 |
| 4545203 |
Hydrostatic drive units |
Oct. 8, 1985 |
| 4531533 |
Seismic trigger |
Jul. 30, 1985 |
| 4201536 |
Vibration responsive mechanism |
May. 6, 1980 |
| 4094332 |
Earthquake-responsive fuel shut-off device |
Jun. 13, 1978 |
| 3938538 |
Control valve apparatus |
Feb. 17, 1976 |
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