Patent US3791387A successfully refreshed from Google Patents.
US3791387A
Expired / Lapsed
US
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Forceps
Assignee: Olympus Corp
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Filing: 1973-03-05
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Granted: 1974-02-12
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Expires: 1993-03-05
Abstract
Abstract A forceps for use with an endoscope has a first or cutting wire which extends in a loop from the distal end of the flexible endoscope tube, whereas the two proximal ends may be shifted in the tube by means of a control mechanism on the proximal tube end so as to expand and contract the loop. A second wire has a distal end pivotally attached to the loop, while its main portion passes through the endoscope tube to a control device at the proximal end of the tube which permits the second wire to be shifted longitudinally in the tube, and thereby to be bulged out from the loop for receiving a polyp or the like, and to be tightened about the severed polyp for safely retracting the severed piece together with the forceps.
Inventors
- 👤 M Itoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:51
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/28; A61B17/29; A61B17/32; A61B17/3205; A61B17/32056; A61B17/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
219 words
A forceps for use with an endoscope comprising: a. a flexible, elongated tube having a distal end portion and a proximal end portion; b. a first elongated wire having two branch portions and an arcuate loop portion connecting said branch portions, said loop portion projecting from said distal end portion, and said branch portions extending from said loop portion toward said proximal end portion and being movably received in said tube; c. a second wire having a terminal portion pivotally secured to a part of said loop portion remote from said distal end portion in a direction away from said proximal end portion, said second wire being movably received in said tube and extending from said terminal portion toward said proximal end portion; d. first control means on said proximal end portion and operatively connected to said branch portions for shifting the same longitudinally in said tube, whereby the loop defined by said loop portion may be expanded and contracted, and a polyp captured in said loop may be severed by contracting said loop; and e. second control means on said proximal end portion and operatively connected to said second wire for shifting the same longitudinally in said tube to provide a means for securing a polyp severed by said contracting loop portion for subsequent removal with said forceps.
Claim 2
Dependent Claim
219 words
A forceps for use with an endoscope comprising: a. a flexible, elongated tube having a distal end portion and a proximal end portion; b. a first elongated wire having two branch portions and an arcuate loop portion connecting said branch portions, said loop portion projecting from said distal end portion, and said branch portions extending from said loop portion toward said proximal end portion and being movably received in said tube; c. a second wire having a terminal portion pivotally secured to a part of said loop portion remote from said distal end portion in a direction away from said proximal end portion, said second wire being movably received in said tube and extending from said terminal portion toward said proximal end portion; d. first control means on said proximal end portion and operatively connected to said branch portions for shifting the same longitudinally in said tube, whereby the loop defined by said loop portion may be expanded and contracted, and a polyp captured in said loop may be severed by contracting said loop; and e. second control means on said proximal end portion and operatively connected to said second wire for shifting the same longitudinally in said tube to provide a means for securing a polyp severed by said contracting loop portion for subsequent removal with said forceps.
Claim 3
Dependent Claim
42 words
A forceps as set forth in claim 1, wherein said part of said loop portion constitutes a bight portion having a smaller radius of curvature than the remainder of said loop portion, said terminal portion being pivotally secured to said bight portion.
Claim 4
Dependent Claim
63 words
A forceps as set forth in claim 1, further comprising a forked connecting piece attached to said part of said loop portion and defining a slot, said terminal portion being received in said slot, and a pin member attached to said connecting piece, a portion of said pin member being located in said slot and securing said terminal portion to said connecting piece.
Claim 5
Dependent Claim
40 words
A forceps as set forth in claim 1, further comprising a first eye on said part of said loop portion and a second eye on said terminal portion of the second wire, said first and second eyes being pivotally interengaged.
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |