Tilt top anvil with torsion spring
First Claim
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1. An anvil assembly for use with a surgical instrument, the anvil assembly comprising:
- a head including a collar and an anvil plate, the collar being longitudinally translatable with respect to the anvil plate;
a rod extending proximally from the head; and
a biasing element disposed in mechanical cooperation with the head;
wherein the anvil assembly has a first condition in which the head is non-pivotable with respect to the rod, and the anvil assembly has a second condition in which the head is pivotable with respect to the rod, and wherein when the anvil assembly is in its first condition, the collar is longitudinally movable from a first position where at least a portion of the collar is disposed proximally of a portion of the biasing element to a second position where at least a portion of the collar is disposed distally of the portion of the biasing element.
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Abstract
A tilt anvil assembly is disclosed which includes a center rod, a head assembly, and a torsion spring configured to pivot the head assembly relative to the center rod. The head assembly has a locking collar defining a locked position preventing pivotal movement of the head assembly, and an unlocked position allowing pivotal movement of the head assembly. The torsion spring selectively engages the locking collar to maintain the locking collar at either the locked or unlocked position.
421 Citations
15 Claims
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1. An anvil assembly for use with a surgical instrument, the anvil assembly comprising:
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a head including a collar and an anvil plate, the collar being longitudinally translatable with respect to the anvil plate; a rod extending proximally from the head; and a biasing element disposed in mechanical cooperation with the head; wherein the anvil assembly has a first condition in which the head is non-pivotable with respect to the rod, and the anvil assembly has a second condition in which the head is pivotable with respect to the rod, and wherein when the anvil assembly is in its first condition, the collar is longitudinally movable from a first position where at least a portion of the collar is disposed proximally of a portion of the biasing element to a second position where at least a portion of the collar is disposed distally of the portion of the biasing element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of using an anvil assembly, comprising:
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longitudinally translating a knife of a surgical instrument a predetermined amount such that the anvil assembly switches from a first condition where a head of the anvil assembly is non-pivotable with respect to a rod of the anvil assembly, to a second condition where the head of the anvil assembly is pivotable with respect to the rod of the anvil assembly; and wherein when the anvil assembly is in its first condition, longitudinally moving a collar of the surgical instrument from a first position where at least a portion of the collar is disposed proximally of a portion of the biasing element to a second position where at least a portion of the collar is disposed distally of the portion of the biasing element. - View Dependent Claims (15)
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Specification