Tilt top anvil with torsion spring
First Claim
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1. A tilt anvil assembly comprising:
- a center rod defining a longitudinal axis;
a head assembly including a housing, a locking collar, and an anvil plate having staple deforming pockets; and
a torsion spring configured to pivot the head assembly relative to the center rod from a non-pivoted position to a pivoted position;
wherein when the head assembly is in the non-pivoted position, the locking collar is longitudinally movable from a first position where at least a portion of the locking collar is disposed proximally of a portion of the torsion spring, to a second position where at least a portion of the locking collar is disposed distally of the portion of the torsion spring.
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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.
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Citations
28 Claims
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1. A tilt anvil assembly comprising:
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a center rod defining a longitudinal axis; a head assembly including a housing, a locking collar, and an anvil plate having staple deforming pockets; and a torsion spring configured to pivot the head assembly relative to the center rod from a non-pivoted position to a pivoted position; wherein when the head assembly is in the non-pivoted position, the locking collar is longitudinally movable from a first position where at least a portion of the locking collar is disposed proximally of a portion of the torsion spring, to a second position where at least a portion of the locking collar is disposed distally of the portion of the torsion spring. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for pivoting an anvil head assembly of a surgical anvil assembly comprising:
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providing an anvil assembly including; a rod; a head assembly; a locking collar; and a torsion spring configured to pivot the head assembly relative to the rod from a non-pivoted position to a pivoted position; and while the head assembly is in the non-pivoted position, moving the locking collar from a first position where at least a portion of the locking collar is disposed proximally of a portion of the torsion spring and where the head assembly is prevented from pivoting, to a second position where at least a portion of the locking collar is disposed distally of the portion of the torsion spring and where the head assembly is capable of pivoting. - View Dependent Claims (18, 19)
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20. A tilt anvil assembly comprising:
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a center rod; a head assembly including a housing, a locking collar, and an anvil plate having staple deforming pockets; and a torsion spring configured to pivot the head assembly relative to the center rod, the torsion spring including a coiled structure and at least one biasing member extending radially outwardly from the coiled structure. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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Specification