Surgical instrument seal assembly
First Claim
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1. A surgical instrument seal assembly for mounting to a cannula for the insertion of a surgical instrument, the seal assembly comprising:
- an upper body portion having an upper surface that defines a throughbore extending completely through the seal assembly;
a lower body portion projecting below the upper body portion wherein the lower body portion defines a cannula receiving opening adapted to mount the seal assembly on the cannula; and
a unitary valve seal comprising;
an upper seal portion having a mounting portion and a generally frustoconical upper sealing member having a first taper extending from the mounting portion, wherein the mounting portion is rigidly mounted in the upper body portion adjacent an interior portion of the upper body portion, said interior portion opposing the upper surface, the upper seal portion being mounted about the throughbore; and
a lower seal portion extending from the upper seal portion, the lower seal portion being adapted to seal around the surgical instrument and having a generally frusto-conical lower sealing member having a second taper that is different from the first taper, the lower sealing member including a lower seal wall having an inner wall portion and an outer wall portion, a reinforcing layer being disposed intermediate the inner wall portion and the outer wall portion.
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Abstract
A surgical instrument valve assembly is provided with a valve seal where the upper portion of the valve seal is rigidly mounted to the body of the valve assembly. The lower portion of the valve seal is configured to allow some radial movement while the upper portion of the valve seal remains rigidly mounted within the valve assembly. The valve seal may be provided with stay that prevents the valve seal from inverting when an instrument in withdrawn from the valve assembly.
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Citations
35 Claims
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1. A surgical instrument seal assembly for mounting to a cannula for the insertion of a surgical instrument, the seal assembly comprising:
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an upper body portion having an upper surface that defines a throughbore extending completely through the seal assembly;
a lower body portion projecting below the upper body portion wherein the lower body portion defines a cannula receiving opening adapted to mount the seal assembly on the cannula; and
a unitary valve seal comprising;
an upper seal portion having a mounting portion and a generally frustoconical upper sealing member having a first taper extending from the mounting portion, wherein the mounting portion is rigidly mounted in the upper body portion adjacent an interior portion of the upper body portion, said interior portion opposing the upper surface, the upper seal portion being mounted about the throughbore; and
a lower seal portion extending from the upper seal portion, the lower seal portion being adapted to seal around the surgical instrument and having a generally frusto-conical lower sealing member having a second taper that is different from the first taper, the lower sealing member including a lower seal wall having an inner wall portion and an outer wall portion, a reinforcing layer being disposed intermediate the inner wall portion and the outer wall portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A valve seal assembly for use in a surgical instrument seal assembly, the valve seal comprising:
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an upper seal portion having a generally frusto-conical upper sealing member having a first taper;
a lower seal portion extending from the upper seal portion wherein the lower seal portion is adapted to seal around the surgical instrument and has a generally frusto-conical lower sealing member having a second taper that is different from the first taper, the lower sealing member including a lower seal wall having an inner wall portion and an outer wall portion, a reinforcing layer being disposed intermediate the inner wall portion and the outer wall portion; and
a stay wherein at least a portion of the stay is incapsulated in the lower portion of the valve seal. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification