Valve structure for an oral evacuator system

Details Valve structure for an oral evacuator system Valve structure for an oral evacuator system

1983-08-01

1985-06-11

Wilson, John J.

Dentistry

Apparatus

Having suction orifice

251340, 251348, 604902, A61C 1704

Patent

active

045225923

ABSTRACT:
A hand-held valve structure for use with an oral evacuator system of the type which includes a vacuum source/waste disposal unit connected to the valve structure through a flexible vacuum hose. The valve structure includes an elongated body member having a central bore which is coupled to the vacuum hose. The upstream end of the body member includes a valve seat which surrounds the central bore. A poppet or valve piece, which is positioned adjacent the valve seat, is secured to the one end of a connecting rod, the rod being slidably-mounted on the body member. A detachable cover having a central bore is secured over the valve seat of the body member. The cover is provided with a slot which provides access to the connecting rod. A thumb latch is provided which is connected to the connecting rod through the cover member slot. A cam spring is positioned around the body member and engages the thumb latch so as to latch the poppet in either an open or a closed position. The slot or access opening is positioned downstream of the valve so that any entrapped flowable material upstream of the valve is prevented from escaping through the access opening or slot when the valve is closed.

REFERENCES:
patent: 2369356 (1945-02-01), Koehn
patent: 3232578 (1966-02-01), Cousins
patent: 4015336 (1977-04-01), Johnson
patent: 4081176 (1978-03-01), Johnson
patent: 4430073 (1984-02-01), Bemis et al.

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