Patent EP0230751A2 successfully refreshed from Google Patents.
EP0230751A2
Expired / Lapsed
EP
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Biopsy seal
Assignee: Welch Allyn Inc
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Filing: 1986-12-16
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Granted: —
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Expires: 2006-12-16
Abstract
Abstract A disposable seal for an end fitting (14), e.g. for a biopsy channel of an endoscope, has a distal end portion (46) which fits over a tubular luer lock device (20) on the fitting (14). The distal end portion (46) has a radial cuff (68) that seals against a flat transverse surface of a retaining ring (28) and a frustoconic tapered protruding member (72) which fits against a similar inner surface of the retaining ring to ensure that the cuff sealably engages the retaining ring under over-pressure conditions. The seal is unitarily moulded of a soft elastomer and has a double seal arrangement formed of an end wall (50) having a circular opening (54) and a plate or web (58) behind the end wall which is formed with a slit (60) defined between hinged portions which allow the plate to yield inwardly to permit insertion of an instrument, but not outwardly.
Inventors
- 👤 Alan I. Krauter
- 👤 Fred C. Cope
- 👤 John H. Bean
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 04:41
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/04; A61B1/00; A61B1/00131; A61B1/00137; A61B1/012; A61B1/018; A61M; A61M39/00; A61M39/02; A61M39/06; A61M39/0606; A61M2039/0633; A61M2039/066; A61M2039/0686
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
199 words
A biopsy seal for sealably covering a luer lock type fitting which fitting includes a tubular hollow stem and a pair of radial retaining flanges at its free end, the seal permitting insertion of an elongated instrument of generally circular cross section therethrough and through the stem of the fitting, and being formed of a generally tubular body of an elastomeric material comprising a proximal sealing portion connected to a distal seating portion by means of a medial portion, the proximal sealing portion including an outer transverse wall having a central opening therein and a transverse sealing plate disposed within the body behind the outer transverse wall so as to define a generally disc-shaped cavity between the wall and the plate, the plate having a slit across it and being yieldable to open for insertion of the elongated instrument through the opening in the wall which seals against the side of the instrument and through the slit in the plate which remains closed in the absence of the instrument, the distal seating portion including a cylindrical passage for receiving the stem of the fitting and the medial portion including means for engaging the radial retaining flanges of the fitting.
Claim 2
Dependent Claim
199 words
A biopsy seal for sealably covering a luer lock type fitting which fitting includes a tubular hollow stem and a pair of radial retaining flanges at its free end, the seal permitting insertion of an elongated instrument of generally circular cross section therethrough and through the stem of the fitting, and being formed of a generally tubular body of an elastomeric material comprising a proximal sealing portion connected to a distal seating portion by means of a medial portion, the proximal sealing portion including an outer transverse wall having a central opening therein and a transverse sealing plate disposed within the body behind the outer transverse wall so as to define a generally disc-shaped cavity between the wall and the plate, the plate having a slit across it and being yieldable to open for insertion of the elongated instrument through the opening in the wall which seals against the side of the instrument and through the slit in the plate which remains closed in the absence of the instrument, the distal seating portion including a cylindrical passage for receiving the stem of the fitting and the medial portion including means for engaging the radial retaining flanges of the fitting.
Claim 3
Dependent Claim
17 words
A biopsy seal according to claim 1 wherein the outer transverse wall has a concave outer surface.
Claim 4
Dependent Claim
27 words
A biopsy seal according to claim 1 or claim 2 wherein the proximal portion has a barrel-shaped circumferential wall to facilitate placement and removal of the seal.
Claim 5
Dependent Claim
21 words
A biopsy seal according to any one of the preceding claims in which the cavity is filled with a suitable lubricant.
Claim 6
Dependent Claim
36 words
A biopsy seal according to any one of the preceding claims wherein the opening in the outer transverse wall is constructed to seal with instruments having a cross sectional diameter of 2.2 mm to 3.8 mm.
Claim 7
Dependent Claim
20 words
A biopsy seal according to any one of the preceding claims wherein said elastomer is a soft bio-compatible synthetic polymer.
Claim 8
Dependent Claim
77 words
A biopsy seal according to any one of the preceding claims wherein the transverse sealing plate includes one way hinging means joining the plate to a side wall of the proximal portion of the tubular body, permitting the slit to open when the instrument is inserted through the opening in the transverse wall and is pushed distally against the plate but maintaining the slit tightly shut under pressure from the distal side of the transverse sealing plate.
Claim 9
Dependent Claim
31 words
A biopsy seal according to claim 7, wherein the hinging means includes a hinge portion joining the plate and the side wall and offset towards the proximal side of the plate.
Claim 10
Dependent Claim
202 words
A biopsy seal for sealably covering a luer lock type fitting which fitting includes a tubular hollow stem and a pair of radial retaining flanges at a free end thereof the seal permitting insertion of an elongated instrument therethrough and through the stem of the fitting, the biopsy seal being formed of a generally tubular body of an elastomeric material and comprising a proximal sealing portion, a distal seating portion, and a medial portion connecting the distal and proximal portions, the proximal sealing portion including an outer tubular wall and a transverse sealing plate disposed within the body and having a slit across it, the plate being yieldable to open for insertion of the elongated instrument therethrough, the transverse sealing plate having a hinge portion connecting the plate to the side wall, the hinge portion being offset towards the proximal end of the transverse sealing plate so that pressure at the proximal side of the plate urges the slit open but pressure at the distal side thereof urges the slit tightly shut, the distal seating portion including a cylindrical passage for receiving the stem of the fitting, and the medial portion including means for engaging the radial retaining flanges of the fitting.
Claim 11
Dependent Claim
202 words
A biopsy seal for sealably covering a luer lock type fitting which fitting includes a tubular hollow stem and a pair of radial retaining flanges at a free end thereof the seal permitting insertion of an elongated instrument therethrough and through the stem of the fitting, the biopsy seal being formed of a generally tubular body of an elastomeric material and comprising a proximal sealing portion, a distal seating portion, and a medial portion connecting the distal and proximal portions, the proximal sealing portion including an outer tubular wall and a transverse sealing plate disposed within the body and having a slit across it, the plate being yieldable to open for insertion of the elongated instrument therethrough, the transverse sealing plate having a hinge portion connecting the plate to the side wall, the hinge portion being offset towards the proximal end of the transverse sealing plate so that pressure at the proximal side of the plate urges the slit open but pressure at the distal side thereof urges the slit tightly shut, the distal seating portion including a cylindrical passage for receiving the stem of the fitting, and the medial portion including means for engaging the radial retaining flanges of the fitting.
Claim 12
Dependent Claim
27 words
A biopsy seal according to claim 9 wherein the hinge portion and the transverse sealing plate define an undercut portion on the distal side of the plate.
Claim 13
Dependent Claim
25 words
A biopsy seal according to claim 9 wherein the hinge portion extends slopingly from a radial edge of the plate proximally to the side wall.
Claim 14
Dependent Claim
27 words
A biopsy seal according to claim 9, further comprising means disposed proximally of the transverse sealing plate defining a circular seal for sealing against the elongated instrument.
Claim 15
Dependent Claim
98 words
A sealable fitting for an external end of a biopsy channel, the fitting comprising a generally cylindrical metal plug having threads for engaging mating threads of the biopsy channel external end and having an axial aperture therethrough, a hollow luer stem disposed axially on the plug on a proximal side thereof and having a pair of oppositely disposed radial flanges at the proximal end of the stem, and a retaining ring formed on the proximal side of the plug surrounding the stem, the retaining ring having a flat transverse surface and a frustoconic tapered surface facing the stem.
Claim 16
Dependent Claim
98 words
A sealable fitting for an external end of a biopsy channel, the fitting comprising a generally cylindrical metal plug having threads for engaging mating threads of the biopsy channel external end and having an axial aperture therethrough, a hollow luer stem disposed axially on the plug on a proximal side thereof and having a pair of oppositely disposed radial flanges at the proximal end of the stem, and a retaining ring formed on the proximal side of the plug surrounding the stem, the retaining ring having a flat transverse surface and a frustoconic tapered surface facing the stem.
Claim 17
Dependent Claim
27 words
A sealable fitting according to claim 13 wherein the frustoconic surface is tapered with respect to the centre axis at an angle of about 12° to 15°.
Claim 18
Dependent Claim
18 words
A sealable fitting according to claim 13 wherein the fitting is unitarily formed of a suitable bio-compatible metal.
Claim 19
Dependent Claim
13 words
A sealable fitting according to claim 15 wherein the metal is stainless steel.
Claim 20
Dependent Claim
183 words
A biopsy seal for sealably covering a luer lock type fitting which fitting includes a tubular hollow stem and a pair of radial retaining flanges at a free end thereof, the fitting also including a retaining ring surrounding the stem and having a flat transverse sealing surface and a tapered frustoconic surface facing the stem, the biopsy seal being formed of a generally tubular body of an elastomeric material and comprising a proximal sealing portion, a distal seating portion, and a medial portion connecting the distal and proximal portions, the proximal sealing portion including means permitting insertion of an elongated instrument therethrough and thence through the hollow stem of the fitting, but resisting release of fluids out of the proximal end of the seal, the distal seating portion including a cylindrical passage for receiving the stem of the fitting, a transverse flange for sealably engaging the flat transverse sealing surface of the retaining ring, and an axially protruding annulus extending distally of the flange and having a frustoconic tapered outer surface mating with the stem-facing surface of the sealing ring of the fitting.
Claim 21
Dependent Claim
183 words
A biopsy seal for sealably covering a luer lock type fitting which fitting includes a tubular hollow stem and a pair of radial retaining flanges at a free end thereof, the fitting also including a retaining ring surrounding the stem and having a flat transverse sealing surface and a tapered frustoconic surface facing the stem, the biopsy seal being formed of a generally tubular body of an elastomeric material and comprising a proximal sealing portion, a distal seating portion, and a medial portion connecting the distal and proximal portions, the proximal sealing portion including means permitting insertion of an elongated instrument therethrough and thence through the hollow stem of the fitting, but resisting release of fluids out of the proximal end of the seal, the distal seating portion including a cylindrical passage for receiving the stem of the fitting, a transverse flange for sealably engaging the flat transverse sealing surface of the retaining ring, and an axially protruding annulus extending distally of the flange and having a frustoconic tapered outer surface mating with the stem-facing surface of the sealing ring of the fitting.
Claim 22
Dependent Claim
27 words
A biopsy seal according to claim 17 in which the frustoconic outer surface has a taper with respect to the centre axis of about 12° to 15°.
Claim 23
Dependent Claim
29 words
A biopsy seal according to claim 17 wherein the cylindrical passage has a shoulder at a proximal end thereof for engaging beneath the radial retaining flanges of the fitting.
Claim 24
Dependent Claim
21 words
A biopsy seal according to claim 17 wherein the medial portion is thinner walled that the proximal and the distal portions.
References Cited (Backward Citations)
No citation records indexed.
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