Patent US3739784A successfully refreshed from Google Patents.
US3739784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical instrument
Assignee: Olympus Corp
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Filing: 1971-12-01
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Granted: 1973-06-19
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Expires: 1991-12-01
Abstract
Abstract Forceps for use with an endoscope. The distal end portion of the forceps is provided with a pair of longitudinal parallel legs separated by a slot therebetween. The longitudinal edge of at least one of the legs is made a sharp cutting edge and the front end of a wire having a diameter slightly smaller than the width of the slot and extending through the flexible tube of the forceps so as to be manually operated at its rearward end is pivotally mounted on the forward ends of the legs in the slot so that the forward end portion of the wire is bent to form a loop so as to capture a projecting mass such as a polyp when the wire is pushed forwardly while the wire is tensioned to move into the slot when the wire is pulled rearwardly, thereby severing the captured projecting mass by the cooperation of the wire with the cutting edge of the leg.
Inventors
- 👤 M Itoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:13
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/28; A61B17/29; A61B1/00; A61B1/012; A61B1/018; A61B17/32; A61B17/320016; A61B17/3205; A61B17/32056; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B2018/1405; A61B2018/1407
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
258 words
A forceps for use with an endoscope comprising: a. an elongated flexible tube having two longitudinally terminal portions and formed with a longitudinal bore therethrough; b. wall means elongated in the direction of elongation of said tube and longitudinally projecting from one of said terminal portions, 1. said wall means defining a recess elongated in said direction and having a side open transversely of said direction, 2. said wall means having an elongated cutting edge adjacent said Recess, 3. said recess having one longitudinal part adjacent said one terminal portion and communicating with said bore and another longitudinal part spaced from said one part and remote from said one terminal portion; c. an elongated flexible member slidably guided in said bore and said recess; d. pivot means securing one longitudinal end portion of said flexible member to said wall means for pivotal movement about an axis transverse to said direction in said other part of said recess and for limiting movement of said one end portion in said direction; and e. control means on the other longitudinally terminal portion of said tube operatively connected to the other longitudinal end portion of said flexible member for moving said other end portion toward and away from said one terminal portion and for thereby moving said one end portion transversely of said direction outward of said recess through said open side until said one end portion and said wall means bound a loop, and for thereafter reducing the size of said loop and moving said one end portion into said recess.
Claim 2
Dependent Claim
258 words
A forceps for use with an endoscope comprising: a. an elongated flexible tube having two longitudinally terminal portions and formed with a longitudinal bore therethrough; b. wall means elongated in the direction of elongation of said tube and longitudinally projecting from one of said terminal portions, 1. said wall means defining a recess elongated in said direction and having a side open transversely of said direction, 2. said wall means having an elongated cutting edge adjacent said Recess, 3. said recess having one longitudinal part adjacent said one terminal portion and communicating with said bore and another longitudinal part spaced from said one part and remote from said one terminal portion; c. an elongated flexible member slidably guided in said bore and said recess; d. pivot means securing one longitudinal end portion of said flexible member to said wall means for pivotal movement about an axis transverse to said direction in said other part of said recess and for limiting movement of said one end portion in said direction; and e. control means on the other longitudinally terminal portion of said tube operatively connected to the other longitudinal end portion of said flexible member for moving said other end portion toward and away from said one terminal portion and for thereby moving said one end portion transversely of said direction outward of said recess through said open side until said one end portion and said wall means bound a loop, and for thereafter reducing the size of said loop and moving said one end portion into said recess.
Claim 3
Dependent Claim
11 words
said wall means having an elongated cutting edge adjacent said Recess,
Claim 4
Dependent Claim
11 words
said wall means having an elongated cutting edge adjacent said Recess,
Claim 5
Dependent Claim
25 words
A forceps as set forth in claim 1, wherein said wall means include two leg members elongated in said direction and laterally bounding said recess.
Claim 6
Dependent Claim
37 words
A forceps as set forth in claim 2, wherein said leg members have respective opposite faces in said recess, one of said faces terminating in said cutting edge, and the other face being formed with a receptacle.
Claim 7
Dependent Claim
179 words
said recess having one longitudinal part adjacent said one terminal portion and communicating with said bore and another longitudinal part spaced from said one part and remote from said one terminal portion; c. an elongated flexible member slidably guided in said bore and said recess; d. pivot means securing one longitudinal end portion of said flexible member to said wall means for pivotal movement about an axis transverse to said direction in said other part of said recess and for limiting movement of said one end portion in said direction; and e. control means on the other longitudinally terminal portion of said tube operatively connected to the other longitudinal end portion of said flexible member for moving said other end portion toward and away from said one terminal portion and for thereby moving said one end portion transversely of said direction outward of said recess through said open side until said one end portion and said wall means bound a loop, and for thereafter reducing the size of said loop and moving said one end portion into said recess.
Claim 8
Dependent Claim
179 words
said recess having one longitudinal part adjacent said one terminal portion and communicating with said bore and another longitudinal part spaced from said one part and remote from said one terminal portion; c. an elongated flexible member slidably guided in said bore and said recess; d. pivot means securing one longitudinal end portion of said flexible member to said wall means for pivotal movement about an axis transverse to said direction in said other part of said recess and for limiting movement of said one end portion in said direction; and e. control means on the other longitudinally terminal portion of said tube operatively connected to the other longitudinal end portion of said flexible member for moving said other end portion toward and away from said one terminal portion and for thereby moving said one end portion transversely of said direction outward of said recess through said open side until said one end portion and said wall means bound a loop, and for thereafter reducing the size of said loop and moving said one end portion into said recess.
Claim 9
Dependent Claim
58 words
A forceps as set forth in claim 1, wherein said pivot means include an elongated arm pivoted to said wall means for angular movement about said axis inward and outward of said open side and having a free end fastened to said one end portion of said flexible member, said arm being more rigid than said flexible member.
Claim 10
Dependent Claim
32 words
A forceps as set forth in claim 4, wherein said arm has a longitudinal cutting edge located for shearing cooperation with the cutting edge of said wall means during said angular movement.
Claim 11
Dependent Claim
31 words
A forceps as set forth in claim 1, further comprising means in said recess for limiting buckling of said one end portion of the flexible member away from said open side.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |