Claims
- 1. Pneumatic operating mechanism, comprising:
- a pneumatic operating mechanism having a driving piston within an operating cylinder and an opening valve assembly controlling the admission of high pressure air to said operating cylinder;
- linkage means interconnecting said driving piston to a movable contact;
- said opening valve assembly including a trip valve piston within a trip valve piston bore, a trip valve, a trip valve shaft connecting said trip valve piston to said trip valve, and means for rapidly eliminating pressurized air from said trip valve piston bore at a predetermined time;
- said means for rapidly eliminating pressurized air from said trip valve piston bore including an exhaust port disposed between said trip valve piston bore and the outside atmosphere, and a trip valve stem extension disposed on said trip valve shaft. said trip valve stem extension being disposed within and having a sliding fit with said exhaust port, said trip valve stem extension and said exhaust port having predetermined diameters and said trip valve stem extension having a predetermined length to provide for control of the opening duration of said trip valve.
- 2. A pneumatic valve, comprising:
- a trip valve piston within a trip valve piston bore, a trip valve, a trip valve shaft connecting said trip valve piston to said trip valve, and means for rapidly eliminating pressurized air from said trip valve piston bore at a predetermined time;
- said means for rapidly eliminating pressurized air from said trip valve piston bore including an exhaust port disposed between said trip valve piston bore and the outside atmosphere, and a trip valve stem extension disposed on said trip valve shaft, said trip valve stem extension being disposed within and having a sliding fit with said exhaust port, said trip valve stem extension and said exhaust port having predetermined diameters and said trip valve stem extension having a predetermined length to provide for control of the opening duration of said trip valve.
Parent Case Info
This is a division of application Ser. No. 321,136, filed Nov. 13, 1981, now U.S. Pat. No. 4,463,229.
US Referenced Citations (5)
Divisions (1)
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Number |
Date |
Country |
Parent |
321136 |
Nov 1981 |
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