EP0543107A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Handle for endoscopic surgical instruments and jaw structure
Assignee: United States Surgical Corp
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Filing: 1992-09-18
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Granted: —
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Expires: 2012-09-18
Abstract
Abstract An endoscopic or laparoscopic surgical instrument (100) having an internally disposed ratchet mechanism (128) located within a barrel portion (108) of a handle assembly (102). The instrument includes a handle assembly having a pivoting handle (104) and a stationary handle (106), a barrel portion (108) to which an elongate body assembly (110) is secured, and a ratchet mechanism (118) for releasably positioning a tool mechanism located at the distal end of the body assembly at various increments. The ratchet mechanism comprises a pawl member (124) and a rack member which are disposed within the handle assembly. A rotational knob (116) and locking member may also be provided to lock the body assembly at various orientations to the longitudinal axis. The tool assembly includes novel atraumatic jaw mechanisms incorporating flexural characteristics (204) to better gauge the force being applied to the captured tissue.
Inventors
- 👤 Ernie Aranyi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-22 23:56
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/28; A61B17/29; A61B17/2812; A61B17/2833; A61B2017/2837; A61B2017/2926; A61B2017/2927; A61B2017/2929; A61B2017/2932; A61B2017/2933; A61B2017/2936
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
131 words
An endoscopic or laparoscopic surgical instrument comprising: a handle portion; an endoscopic portion having a proximal end connected to said handle portion and a distal end mounting an atraumatic jaw mechanism, said atraumatic jaw mechanism comprising: a pair of jaw members disposed in opposing relation and relatively pivotal about a common point between at least an open position and a closed position, each said jaw member comprising: a distal portion including a tissue engaging face; a proximal portion including pivot means adapted to cooperate with a linkage means; and a flexible intermediate portion interconnecting said distal portion and said proximal portion, said jaw members being precambered such that when they are pivoted to a closed position, a contact surface of the distal portions of said jaw members contact each other first.
Claim 2
Dependent Claim
29 words
An instrument as claimed in claim 1, wherein the proximal portions of said jaw members are provided with camming slots for engaging a bearing surface on said linkage means.
Claim 3
Dependent Claim
30 words
An instrument as claimed in claim 1 or 2, wherein the proximal portions of said jaw members include hinged connection means for connecting said jaw mechanisms and said linkage means.
Claim 4
Dependent Claim
137 words
An endoscopic or laparoscopic surgical instrument comprising: a handle assembly including a barrel portion, a stationary handle and a pivoting handle; a body assembly comprising a pair of coaxial members attached at one end to said handle assembly, including an inner rod member slidable within an outer tube member in response to movement of said handle assembly, said body assembly terminating at an end remote from said handle assembly in a reciprocally movable jaw mechanism, said jaw mechanism having a pair of jaw members disposed in opposing relation and relatively pivotal about a common point between at least an open position and a closed position, each said jaw member includes a distal portion including pivot means adapted to cooperate with said inner rod member and a flexible intermediate portion interconnecting said distal portion and said proximal portion.
Claim 5
Dependent Claim
42 words
An instrument as claimed in claim 4 further comprising a ratchet mechanism positioned within said barrel portion of said handle assembly, said ratchet mechanism engaging said body assembly to provide incremental positioning of said jaw members between said open and closed positions.
Claim 6
Dependent Claim
60 words
A surgical instrument comprising: a pair of jaws, each jaw formed from a single sheet of material having a proximal, distal and intermediate portion, said jaws being twisted in said intermediate portion such that said distal portion is substantially perpendicular to said proximal portion; means for pivotally mounting said jaws in cooperative alignment; and means for selectively pivoting said jaws.
Claim 7
Dependent Claim
43 words
An instrument as claimed in claim 6, further comprising a handle assembly and an elongated tubular member extending from said handle assembly, said jaws extending from a distal end of said tubular member and movable in response to movement of said handle assembly.
Claim 8
Dependent Claim
54 words
An instrument as claimed in any one of the preceding claims wherein said distal portions of said jaw members each have a substantially semicircular shape such that, when said jaw members are pivoted to a closed position, said distal portion of said jaw members provide a substantially circular opening adapted for grasping tubular tissue.
Claim 9
Dependent Claim
47 words
An instrument as claimed in any one of the preceding claims wherein said jaw members are each fabricated from a single piece of sheet metal and the distal portions of said jaw members are disposed in a plane substantially perpendicular to the plane of the proximal portions.
Claim 10
Dependent Claim
48 words
An instrument as claimed in any one of the preceding claims wherein said jaw members are precambered such that when they are pivoted to a closed position, a contact surface of the distal portions of said jaw members contact each other before said intermediate portions come in contact.
Claim 11
Dependent Claim
46 words
An instrument as claimed in claim 10 wherein the distal portions of said first and second jaw members are flexible such that, upon further movement to close said jaw mechanism after first contact of said distal portions, said distal portions flex relative to said proximal portions.
Claim 12
Dependent Claim
32 words
An instrument as claimed in any one of the preceding claims wherein a tissue-engaging surface of the distal portions of said jaw members comprises a plurality of teeth formed on said surface.
Claim 13
Dependent Claim
24 words
An instrument as claimed in any one of the preceding claims, further comprising means for rotating said body assembly to orient said jaw mechanism.
Claim 14
Dependent Claim
43 words
An instrument as claimed in claim 13 wherein said means for rotating said body assembly comprises a knob member circumferentially disposed about said body assembly and protruding radially outward from said body assembly through slots in said barrel portion in said handle assembly.
Claim 15
Dependent Claim
28 words
An instrument as claimed in claim 14 wherein said means for rotating said body assembly further comprises a stop means for arresting rotational movement of said body assembly.
References Cited (Backward Citations)
No citation records indexed.
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