Valved plug for endoscopic biopsy channel
First Claim
1. A valved plug to be fitted on a mouth piece at an inlet opening of an instrument entrance passage leading to a biopsy channel of an endoscopic insertion tube, said plug being formed of a resilient material in its entirety and having, at opposite ends of a foldable connecting strip, a generally tubular main body portion internally formed with a constricted passage of a smaller diameter as compared with said inlet opening of said instrument entrance passage at an intermediate portion between outer and inner ends thereof, and a nesting piece adapted to be detachably and tightly coupled with said main body portion and having a normally closed slit valve in axial alignment with said constricted passage in said main body portion to permit insertion of an instrument therethrough, characterized in that:
- said main body portion is provided with an interlocking inward projection of a predetermined thickness at an outer end to be coupled with said nesting piece; and
said nesting piece is composed of a circular body portion having a slit cut across a center region thereof, and an annular interlocking flange formed integrally with and on top of said circular body portion around said slit and spread radially outward to hang over circumferential edges of said circular body portion;
said interlocking projection on said main body portion of said plug being adapted to be brought into engagement tightly with an interlocking groove formed between said flange portion and said circular body portion of said nesting piece and gripped in said interlocking groove in a compressed state when said nesting piece is coupled with said main body portion.
2 Assignments
0 Petitions
Accused Products
Abstract
A valved plug to be fitted on a mouth piece at an inlet opening of an endoscopic biopsy channel. The plug as a whole is formed of a resilient material, and has, at the opposite ends of a foldable connecting strip or string, a generally tubular main body portion which is provided with a constricted portion in its axial passage, and a valved nesting piece which is adapted to be detachably coupled with the main body portion and provided with a normally closed slit valve axially in an aligned position relative to the constricted passage on the side of the main body portion. The main body portion is provided with an inward interlocking projection of a predetermined thickness at its outer end, for tight interlocking engagement with an interlocking groove which is provided on the side of the nesting piece in such a way as to grip the interlocking projection tightly in a compressed state.
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Citations
9 Claims
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1. A valved plug to be fitted on a mouth piece at an inlet opening of an instrument entrance passage leading to a biopsy channel of an endoscopic insertion tube, said plug being formed of a resilient material in its entirety and having, at opposite ends of a foldable connecting strip, a generally tubular main body portion internally formed with a constricted passage of a smaller diameter as compared with said inlet opening of said instrument entrance passage at an intermediate portion between outer and inner ends thereof, and a nesting piece adapted to be detachably and tightly coupled with said main body portion and having a normally closed slit valve in axial alignment with said constricted passage in said main body portion to permit insertion of an instrument therethrough, characterized in that:
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said main body portion is provided with an interlocking inward projection of a predetermined thickness at an outer end to be coupled with said nesting piece; and
said nesting piece is composed of a circular body portion having a slit cut across a center region thereof, and an annular interlocking flange formed integrally with and on top of said circular body portion around said slit and spread radially outward to hang over circumferential edges of said circular body portion;
said interlocking projection on said main body portion of said plug being adapted to be brought into engagement tightly with an interlocking groove formed between said flange portion and said circular body portion of said nesting piece and gripped in said interlocking groove in a compressed state when said nesting piece is coupled with said main body portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A valved plug as defined 2, wherein a ridge is formed on one of engaging surfaces of said main body portion and nesting piece, said ridge being adapted to be deformed into a flattened shape by compression as said nesting piece is coupled with said main body portion of said plug.
Specification