Endoscope

Details Endoscope Endoscope

1983-01-25

1985-08-27

Coven, Edward M.

Surgery

Truss

Perineal

251325, A61B 100

Patent

active

045371822

ABSTRACT:
A suction selector mechanism of an endoscope is operated such that a suction channel member may be connected to or disconnected from a suction tube guided to a control section. The selector mechanism has a first connecting port and a second connecting port. The first connecting port is formed in a cylinder and is connected to the suction channel member. The second connecting port is formed in the cylinder and is connected to the suction tube. A piston is slidably inserted in the cylinder and has a circular outer surface portion which is brought into air-tight contact with the cylinder. The piston has an annular small-diameter portion at a position different from that of the outer surface portion. The piston has a channel which allows communication between the space defined by the small-diameter portion and the second connecting port. The first connecting port is closed by the outer surface portion of the piston when the piston is positioned in the non-suction position.

REFERENCES:
patent: 408145 (1889-07-01), St. John
patent: 3958566 (1976-05-01), Furihata
patent: 4261343 (1981-04-01), Ouchi et al.
patent: 4270525 (1981-06-01), Furihata
patent: 4361138 (1982-11-01), Kinoshita
patent: 4412531 (1983-11-01), Chikashige

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