Source: http://www.google.com/patents/US4304236?dq=7,346,539
Timestamp: 2016-06-29 09:47:54
Document Index: 601549304

Matched Legal Cases: ['art 12', 'art 14', 'art 12', 'art 14', 'art 14', 'art 12', 'art 14', 'art 14']

Patent US4304236 - Stapling instrument having an anvil-carrying part of particular geometric shape - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsApparatus for circular surgical stapling of hollow organs comprising an instrument and disposable cartridge assembly. The instrument comprises a housing with a throughbore in which a tube that is received for reciprocation by means of a manually operable squeeze handle. A rod reciprocates within the...http://www.google.com/patents/US4304236?utm_source=gb-gplus-sharePatent US4304236 - Stapling instrument having an anvil-carrying part of particular geometric shapeAdvanced Patent SearchPublication numberUS4304236 APublication typeGrantApplication numberUS 06/138,878Publication dateDec 8, 1981Filing dateApr 10, 1980Priority dateMay 26, 1977Publication number06138878, 138878, US 4304236 A, US 4304236A, US-A-4304236, US4304236 A, US4304236AInventorsRobert L. Conta, Harvey N. WallachOriginal AssigneeUnited States Surgical CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (8), Referenced by (404), Classifications (6) External Links: USPTO, USPTO Assignment, EspacenetStapling instrument having an anvil-carrying part of particular geometric shape
US 4304236 AAbstract
Apparatus for circular surgical stapling of hollow organs comprising an instrument and disposable cartridge assembly. The instrument comprises a housing with a throughbore in which a tube that is received for reciprocation by means of a manually operable squeeze handle. A rod reciprocates within the tube by means of a wing nut cooperating with a threaded part of the rod. A two-part disposable cartridge assembly comprised of an anvil-carrying part and a staple-carrying part are detachably mounted on the rod and housing, respectively. Keys are provided to hold the anvil-carrying part and the staple-carrying part in rotational orientation relative to the rod. Mutually coacting stops on the tube and rod determine the extent of reciprocation which is variable in dependence upon the position of the rod which, in turn, is dependent upon the juxtaposition of the anvil-carrying part with the staple-carrying part when the apparatus is closed on tissue preparatory to effecting a circular anastomoses. A novel geometric configuration for the anvil-carrying part is provided for easy removal of the instrument from a stapled anastomosis. Further, the interior of the stapling mechanism is generously vented to prevent the build up of excessive pressure in tissue confined within the stapling mechanism.
1. A surgical stapling apparatus, at least part of which fits within two disconnected sections of hollow body organs, for the purpose of joining said sections with an arrangement of staples which forms a closed pattern, said apparatus comprising:a member including an anvil-carrying part comprising two concentric arrays of spaced staple clinching grooves against which staples are deformed and a rod upon which the anvil-carrying part is mounted, said rod intersecting a plane defined by the staple clinching grooves and lying within the arrays of spaced staple clinching grooves; the intersection of the surface of the rod with the plane of the staple clinching grooves defining a closed geometric figure; said anvil-carrying part having a geometric shape related to the circumference of an inner one of the two concentric arrays of spaced staple clinching grooves such that any cutting plane, other than the cutting plane parallel to said surface of said array of spaced staple clinching grooves, passes through the anvil-carrying part and includes a line of tangency tangent to the exterior of said closed geometric figure, which line of tangency lies within the plane of the staple clinching grooves, and which cutting plane, when rotated about said line of tangency, defines sections of the anvil-carrying part, all of which sections have a perimeter equal to or less than said circumference of said inner one of the two concentric arrays of spaced staple clinching grooves. 2. The stapling apparatus of claim 1, wherein an exterior surface of said anvil-carrying part comprises a portion of a sphere.
Divisional of U.S. patent application Ser. No. 967,421 filed on Dec. 7, 1978, which is a continuation-in-part of U.S. patent application Ser. No. 800,965, filed May 26, 1977 now abandoned.
Referring now to the drawings in detail, a preferred embodiment of the instrument with disposable cartridge mounted thereon according to the teachings of the present invention is depicted in FIGS. 1 and 6. As shown, the instrument comprises a main body or housing defining a throughbore 11 and having an integrally formed rear handle part 12. Projecting from the body 10 is a pivotally mounted handle part 14, pivotably mounted to the body 10 by means of pivot pin 16. The handle part 12 is received in the palm of the hand of the operator and the handle part 14 is grasped by the fingers on the same hand. When the fingers are squeezed toward the palm, handle part 14 is pivoted about pin 16 and brought toward handle part 12. A conventional safety bar 18, terminating in a knob 20 bearing against the pivotable handle part 14 and which, in turn, is pivotally mounted on a pin 22 set into the body 10, serves as a safety to prevent the accidental actuation of handle part 14. Safety 18 is conventional in both function and structure.
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