Surgery – Respiratory method or device – Ozone or ion generation
Patent
1978-07-10
1981-03-17
Michell, Robert W.
Surgery
Respiratory method or device
Ozone or ion generation
210120, 210123, 137202, 137205, 55215, A61M 100
Patent
active
042561094
ABSTRACT:
The specification discloses an improved shut off valve for a canister and lid assembly used as part of a medical suction apparatus. The valve includes a cylindrical plunger made of a soft rubber-like material and having an upwardly facing concave disc integrally formed on the top of the plunger. When the fluid within the canister rises to a predetermined level, the plunger floats upwardly forcing the disc into a sealing relationship covering and blocking a suction port. Alternately, the soft rubber plunger may be dimensioned for use as a plunger cap for the upper end of a hard plastic plunger.
The soft rubber plunger and integral concave disc are formed in a composite die, including a disc die and a plunger die. Rubber is injected into the composite die through a bore to form the plunger and integral concave disc. To remove the rubber concave disc from the disc die, air is injected into a bore while the disc die is simultaneously moved away from the plunger die.
REFERENCES:
patent: 2937976 (1960-05-01), Granahan et al.
patent: 3605786 (1971-09-01), Machin, Jr.
patent: 3646935 (1972-03-01), Holbrook et al.
patent: 3648698 (1972-03-01), Doherty
patent: 3719197 (1973-03-01), Pannier
patent: 3805788 (1974-04-01), Kleiner
patent: 3811485 (1974-05-01), Holbrook
patent: 3827452 (1974-08-01), Baumgarten
patent: 3960165 (1976-06-01), Holbrook et al.
patent: 3965902 (1976-06-01), Reilly et al.
patent: 3965903 (1976-06-01), Cranage
patent: 3989046 (1976-11-01), Pannier et al.
patent: 4178932 (1979-12-01), Ryder et al.
Dow Corning Bulletin, Dow Corning Corp., Midland, Michigan, vol. 5, No. 3, Jul. 1963.
"Silicone Fluid as a Lubricant for Artificial Eyes", Hill et al., The Bulletin, Dow Corning Corp., Midland, Mich., vol. 6, No. 2, 1964, p. 1.
"Lubrication of Scleral Bucklers", Comment of Dr. C. L. Schopens, The Bulletin, Dow Corning Corp., Midland, Mich., vol. 7, No. 1, Jan. 1965, p. 4, col. 1, Jan. 1965.
Kruter J. L.
Michell Robert W.
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