Surge prevention system for an ophthalmic instrument

Details Surge prevention system for an ophthalmic instrument Surge prevention system for an ophthalmic instrument

1981-03-20

1985-01-29

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Material introduced into and removed from body through...

604 31, 604 22, A61M 100

Patent

active

044963424

ABSTRACT:
An instrument for removing liquid and other material from an operating site through an evacuation line under the control of a pump, in which the fluid flow in the line is sensed and a control signal produced when material blocking the line is cleared thereby creating a surge in the fluid flow coming into the line, wherein the control signal operates to apply fluid from a separate source into the line and to stop the pump motor to thereby rapidly equalize the pressure between the operating site and the line. An arrangement is also provided to sense evacuation flow in the line when the pump is not operating and to apply the fluid from the separate source into the line to equalize the pressure.

REFERENCES:
patent: 2988001 (1961-06-01), D'Arcey et al.
patent: 3572319 (1971-03-01), Bittner et al.
patent: 3905353 (1975-09-01), Lichowsky
patent: 3920014 (1975-11-01), Banko
patent: 4024866 (1977-05-01), Wallach
patent: 4168707 (1979-09-01), Douvas et al.
patent: 4324243 (1982-04-01), Helfgott

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