Electricity: circuit makers and breakers – Fluid pressure – Piston
Patent
1984-09-17
1986-04-01
Macon, Robert S.
Electricity: circuit makers and breakers
Fluid pressure
Piston
200148R, 200148F, H01H 3538, H01H 3342
Patent
active
045800200
ABSTRACT:
In an electric circuit interrupter actuator which utilizes gas generator chambers to activate a power cylinder to provide opening and closing of the interrupter, an improved dynamic seal is provided. Such seal works in the reverse direction of an obturator of, for example, a machine gun or artillery piece in that a slidable spring biased sealing ring is provided in the input port to the power cylinder which successively seals with the gas generator chambers which are rotated by it. In order to overcome the friction forces of the initial high velocity gas flow which would otherwise force the ring out of sealing contact, a spring washer is provided having sufficient force to overcome this initial friction force. Thereafter, the high pressure gas exerts a force on the end of the ring in a direction opposite the gas flow to force the sealing ring into tighter engagement. Also, the natural circumferential expansion of the sealing ring, due to the high pressure, promotes radial sealing.
REFERENCES:
patent: 4251701 (1981-02-01), Meyer
patent: 4342978 (1982-08-01), Meister
patent: 4451717 (1984-05-01), Crookston et al.
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