Endoscopic fluid changing device
First Claim
1. An endoscopic fluid changing device which is associated with an endoscope having an instrument channel, comprising:
- a cylindrical casing having a suction port, in the side wall thereof;
a channel pipe provided in the center of the casing, and having an opening at the upper end portion thereof, the lower end portion of said channel pipe being connected to the instrument channel, extending to the distal end portion of the endoscope;
a cap member covering the opening of the channel pipe;
a piston disposed between the casing and the channel pipe, and capable of vertical motion;
a spring for urging the piston upward;
first valve means provided at the upper portion of the piston, and adapted to open or close a first passage as the piston is operated, said first passage extending from the suction port to the outside of the casing; and
second valve means provided at the lower portion of the piston, and adapted to close or open a second passage, in contrast with the first passage, as the piston is operated, said second passage extending from the suction port to the instrument channel.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a construction of an endoscopic fluid changing device which, attached to an endoscope, regulates the flow of a fluid in a channel of the endoscope. The fluid changing device comprises a cylindrical casing having a suction port, in the side wall thereof, a channel pipe provided in the center of the casing, and having an opening at the upper end portion thereof, the lower end portion of the channel pipe being connected to an instrument channel, extending to the distal end portion of the endoscope, a cap member covering the opening of the channel pipe, a piston disposed between the casing and the channel pipe, and capable of vertical motion, a spring for urging the piston upward, first valve device provided at the upper portion of the piston, and adapted to open or close a first passage as the piston is operated, the first passage extending from the suction port to the outside of the casing, and second valve device provided at the lower portion of the piston, and adapted to close or open a second passage, in contrast with the first passage, as the piston is operated, the second passage extending from the suction port to the instrument channel.
91 Citations
16 Claims
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1. An endoscopic fluid changing device which is associated with an endoscope having an instrument channel, comprising:
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a cylindrical casing having a suction port, in the side wall thereof; a channel pipe provided in the center of the casing, and having an opening at the upper end portion thereof, the lower end portion of said channel pipe being connected to the instrument channel, extending to the distal end portion of the endoscope; a cap member covering the opening of the channel pipe; a piston disposed between the casing and the channel pipe, and capable of vertical motion; a spring for urging the piston upward; first valve means provided at the upper portion of the piston, and adapted to open or close a first passage as the piston is operated, said first passage extending from the suction port to the outside of the casing; and second valve means provided at the lower portion of the piston, and adapted to close or open a second passage, in contrast with the first passage, as the piston is operated, said second passage extending from the suction port to the instrument channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An endoscopic fluid changing device which is associated with an endoscope having an instrument channel, comprising:
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a cylindrical casing having a suction port, in the side wall thereof; a cylindrical having a flange portion formed with a plurality of vent holes, and mounted inside the casing by means of the flange portion; a piston having a rod portion and capable of vertical motion, with the rod portion passed through the cylinder; a spring for urging the piston upward; first valve means provided at the upper portion of the cylinder, and adapted to open or close a first passage as the piston is operated, said first passage extending from the suction port to the outside of the casing, via the vent holes; and second valve means provided at the lower portion of the cylinder, and adapted to close or open a second passage, in contrast with the first passage, as the piston is operated, said second passage extending from the suction port to the instrument channel. - View Dependent Claims (14, 15, 16)
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Specification