Gas jet shooting device for use with a non-contact tonometer

Details Gas jet shooting device for use with a non-contact tonometer Gas jet shooting device for use with a non-contact tonometer

1991-07-18

1992-11-24

Cohen, Lee S.

Surgery

Truss

Pad

417553, A61B 316

Patent

active

051654083

ABSTRACT:
A gas jet shooting device for use with a non-contact tonometer, having a hollow head (19) with a nozzle (27) secured thereto, a cylinder (10) which communicates with the head, and a piston (11) reciprocatably mounted in the cylinder and defining a compression chamber (14) in the cylinder, and a linear d.c. motor (31) for driving the piston (11) for compressing the gas in the cylinder (10), the compressed gas being allowed to issue through the nozzle. The cylinder (10) is fed with the gas through a passage which opens into the chamber (14) and which does not include the nozzle. The gas may be air, and drawn into or pushed into the chamber through a filter (F). It may also be a gas other than air, harmless to the eye, supplied from a reservoir through a filter. Such arrangement ensures that air-born dust or tear drops scattered by the air jet will not be drawn into the chamber, and the device can therefore be maintained hygienic.

REFERENCES:
patent: 3585849 (1971-06-01), Grolman
patent: 4770181 (1988-09-01), Tomoda
patent: 4834105 (1989-05-01), Matthews et al.
patent: 5048526 (1991-09-01), Tomoda

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