Patent US4215678A successfully refreshed from Google Patents.
Patent US5588579A successfully refreshed from Google Patents.
US5588579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anvil for circular stapler
Assignee: United States Surgical Corp
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Filing: 1995-11-15
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Granted: 1996-12-31
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Expires: 2015-11-15
Abstract
Abstract An anvil assembly for a surgical fastening instrument is disclosed. The anvil is constructed to pivot relative to an anvil shaft to facilitate movement of the anvil and instrument during use. The anvil also has an improved surface for severing structures and a sloped surface for guiding a knife during use.
Inventors
- 👤 Robert H. Schnut
- 👤 John C. Robertson
- 👤 Richard J. Gallagher
- 👤 David N. Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:44
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/11; A61B17/115; A61B17/1155; A61B2017/00477; A61B17/068; A61B17/072; A61B2017/07214; A61B2017/07257
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
71 words
An anvil assembly for a circular stapling instrument comprising: a shaft having proximal and distal end portions; an anvil pivotally associated with the shaft distal end portion; and a retaining member at least partially disposed within the anvil, the retaining member being movable from a first position, wherein the anvil is prevented from pivoting relative to the shaft, and a second position, wherein the anvil is pivotable relative to the shaft.
Claim 2
Dependent Claim
71 words
An anvil assembly for a circular stapling instrument comprising: a shaft having proximal and distal end portions; an anvil pivotally associated with the shaft distal end portion; and a retaining member at least partially disposed within the anvil, the retaining member being movable from a first position, wherein the anvil is prevented from pivoting relative to the shaft, and a second position, wherein the anvil is pivotable relative to the shaft.
Claim 3
Dependent Claim
29 words
An anvil assembly according to claim 1, further comprising biasing means for pivotally moving the anvil relative to the shaft when the retaining member is in the second position.
Claim 4
Dependent Claim
12 words
The anvil assembly according to claim 1, wherein the shaft is solid.
Claim 5
Dependent Claim
12 words
The anvil assembly according to claim 1, wherein the shaft is hollow.
Claim 6
Dependent Claim
81 words
An anvil assembly for a circular stapling instrument comprising: a shaft having proximal and distal end portions; an anvil pivotally associated with the shaft distal end portion; and a retaining member movable from a first position, wherein a portion of the retaining member is in contact with the distal end portion of the shaft, to a second position, wherein the portion of the retaining member in contact with the distal end portion of the shaft has moved from the first position.
Claim 7
Dependent Claim
81 words
An anvil assembly for a circular stapling instrument comprising: a shaft having proximal and distal end portions; an anvil pivotally associated with the shaft distal end portion; and a retaining member movable from a first position, wherein a portion of the retaining member is in contact with the distal end portion of the shaft, to a second position, wherein the portion of the retaining member in contact with the distal end portion of the shaft has moved from the first position.
Claim 8
Dependent Claim
27 words
The anvil assembly according to claim 5, wherein the anvil is prevented from pivoting relative to the shaft when the retaining member is in the first position.
Claim 9
Dependent Claim
46 words
An anvil assembly for a circular stapling instrument comprising: a shaft having proximal and distal end portions; an anvil pivotally associated with the shaft distal end portion; and biasing means disposed between the shaft and the anvil for pivotally moving the anvil relative to the shaft.
Claim 10
Dependent Claim
46 words
An anvil assembly for a circular stapling instrument comprising: a shaft having proximal and distal end portions; an anvil pivotally associated with the shaft distal end portion; and biasing means disposed between the shaft and the anvil for pivotally moving the anvil relative to the shaft.
Claim 11
Dependent Claim
19 words
The anvil assembly according to claim 7, further comprising locking means for locking the anvil perpendicular to the shaft.
Claim 12
Dependent Claim
21 words
An anvil assembly according to claim 8, wherein the locking means at least partially contacts a distal portion of the shaft.
Claim 13
Dependent Claim
54 words
An anvil assembly for a circular stapling instrument comprising: a shaft having proximal and distal end portions and a longitudinal axis; an anvil pivotally associated with the distal end portion of the shaft; and a spring disposed between the shaft and the anvil for pivotally biasing the anvil relative to the shaft longitudinal axis.
Claim 14
Dependent Claim
54 words
An anvil assembly for a circular stapling instrument comprising: a shaft having proximal and distal end portions and a longitudinal axis; an anvil pivotally associated with the distal end portion of the shaft; and a spring disposed between the shaft and the anvil for pivotally biasing the anvil relative to the shaft longitudinal axis.
Claim 15
Dependent Claim
52 words
An anvil assembly according to claim 10, further comprising a retaining member at least partially disposed within the anvil, the retaining member being movable from a first position, wherein the anvil is prevented from pivoting relative to the shaft, and a second position, wherein the anvil is pivotable relative to the shaft.
Claim 16
Dependent Claim
29 words
An anvil assembly according to claim 11, further comprising a resilient member disposed adjacent the retaining member, wherein the resilient member biases the retaining member into the first position.
Claim 17
Dependent Claim
20 words
An anvil assembly according to claim 12, wherein the resilient member is disposed between the retaining member and the anvil.
Claim 18
Dependent Claim
44 words
An anvil assembly according to claim 10, wherein the anvil includes a staple forming surface disposed in a plane, the staple forming surface being pivotable from a first, substantially perpendicular position to a second, substantially parallel position with respect to the shaft longitudinal axis.
Claim 19
Dependent Claim
16 words
An anvil assembly according to claim 10, wherein the anvil and shaft pivot about a pin.
Claim 20
Dependent Claim
48 words
An anvil assembly according to claim 10, wherein the anvil further comprises at least one post member having proximal and distal end portions, the distal end portion being secured to a substantially central portion of the anvil and the proximal end portion extending substantially perpendicularly from the anvil.
Claim 21
Dependent Claim
29 words
An anvil assembly according to claim 16, wherein the proximal end portion of the at least one post is pivotally secured to the distal end portion of the shaft.
Claim 22
Dependent Claim
12 words
The anvil assembly according to claim 10, wherein the shaft is solid.
Claim 23
Dependent Claim
12 words
The anvil assembly according to claim 10, wherein the shaft is hollow.
Claim 24
Dependent Claim
57 words
In an anvil assembly for a circular stapling instrument, the anvil assembly having an anvil and a shaft having a longitudinal axis extending from the anvil, the improvement comprising: pivotal association between the anvil and shaft and a spring disposed between the shaft and the anvil for pivotally biasing the anvil relative to the shaft longitudinal axis.
Claim 25
Dependent Claim
57 words
In an anvil assembly for a circular stapling instrument, the anvil assembly having an anvil and a shaft having a longitudinal axis extending from the anvil, the improvement comprising: pivotal association between the anvil and shaft and a spring disposed between the shaft and the anvil for pivotally biasing the anvil relative to the shaft longitudinal axis.
Claim 26
Dependent Claim
55 words
An anvil assembly for a circular stapling instrument comprising: a shaft having proximal and distal end portions; an anvil pivotally associated with the shaft distal end portion; and locking means for locking the anvil in a substantially perpendicular orientation relative to the shaft, the locking means at least partially contacting a portion of the shaft.
Claim 27
Dependent Claim
55 words
An anvil assembly for a circular stapling instrument comprising: a shaft having proximal and distal end portions; an anvil pivotally associated with the shaft distal end portion; and locking means for locking the anvil in a substantially perpendicular orientation relative to the shaft, the locking means at least partially contacting a portion of the shaft.
Claim 28
Dependent Claim
34 words
The anvil assembly according to claim 21, further comprising biasing means disposed between the shaft and the anvil for pivotally moving the anvil relative to the shaft after the locking means has been disengaged.
Claim 29
Dependent Claim
21 words
An anvil assembly according to claim 21, wherein the locking means at least partially contacts a distal portion of the shaft.
Claim 30
Dependent Claim
19 words
An anvil assembly according to claim 21, wherein the locking means is at least partially disposed within the anvil.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-12-31 | 2000-07-01 | 2000-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-31 | 2004-07-01 | 2004-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-31 | 2008-07-01 | 2008-12-31 | $7700.00 | Window Closed / Lapsed |