US4369788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversed forceps for microdisc surgery
Assignee: Individual
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Filing: 1981-07-02
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Granted: 1983-01-25
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Expires: 2001-07-02
Abstract
Abstract Forceps of the alligator jaw type, that can be held by a surgeon in a reversed backhand grip while observing the movable jaw during microlumbar discectomy, comprise three linkage devices for resisting twisting forces that tend to separate the sliding arms during removal of gristle. These devices are a slide slot within the rigid arm member in combination with a butt portion of the slideable arm member, a pivot slot within the slideable arm member in combination with a lug portion of the pivotable handle member, and a pin portion of the locking pin member in combination with aligned holes in the slideable arm member and pivotable arm member. The third device simultaneously keeps the forceps in assembled relationship; yet its removal instantly permits disassembly thereof. These three devices are combined within a very compact part of the instrument. Usage of the forceps in a reversed backhand grip enables a surgeon to rest the heel of his hand upon the patient's back and exert a very light touch within the two-millimeter opening so that a plunge beyond the anterior side of the disc can be obviated, the arms can be inserted at a flatter angle beneath the nerves for pulling out gristle, and the operating time can be reduced to about 30 minutes.
Inventors
- 👤 Harold J. Goald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:18
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/1604; A61B17/1606; A61B17/1608; A61B17/1662; A61B17/1671; A61B90/00; A61B90/08; A61B2090/0813
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
359 words
A reversed grip microdisc forceps comprising: a rigid member formed overall in the general shape of an obtuse angle with a shoulder portion at the angle, a handle and finger grip portion as one leg of the angle, hereinafter termed the rear leg and an arm portion as the forward leg of the angle said arm portion having a slide surface thereon on the side face thereof included within the obtuse angle and a fixed jaw at the forward end of said arm portion; a handle and finger grip member positioned within the obtuse angle pivotally secured to the shoulder portion of said rigid member opposing the handle and finger grip rear leg; a slidable arm positioned within the obtuse angle locked at the butt end thereof to said handle and finger grip member adjacent said aforementioned arm portion in an upper fixed arm, lower slidable arm relationship whereby pivoting said handle and finger grip member toward the handle and finger grip portion of said rigid member causes the slidable arm to move, said slidable arm having a first slide surface thereon along the top thereof matched to the aforementioned slide surface on the arm portion of said rigid member, said slidable arm having at least one second slide surface on the bottom thereof at the butt end thereof matched to the hereinafter defined slide surface on the shoulder portion of said rigid member; said shoulder portion being bifurcated into upper and lower legs with the upper leg thereon being the arm portion of said rigid member, the lower leg thereon having thereon a slide surface matched to the said second slide surface on said slidable arm, the upper and lower legs on said shoulder portion providing therebetween above and below a slide slot into which the butt end of the slidable arm fits and wherein the slidable arm slides; and, a pivotable jaw member hingedly attached to said slidable arm at the front end thereof opposite the fixed jaw within the obtuse angle therefrom, opening and closing to said fixed jaw as said slidable arm is caused to slide by pivoting movement of said handle and grip member.
Claim 2
Dependent Claim
359 words
A reversed grip microdisc forceps comprising: a rigid member formed overall in the general shape of an obtuse angle with a shoulder portion at the angle, a handle and finger grip portion as one leg of the angle, hereinafter termed the rear leg and an arm portion as the forward leg of the angle said arm portion having a slide surface thereon on the side face thereof included within the obtuse angle and a fixed jaw at the forward end of said arm portion; a handle and finger grip member positioned within the obtuse angle pivotally secured to the shoulder portion of said rigid member opposing the handle and finger grip rear leg; a slidable arm positioned within the obtuse angle locked at the butt end thereof to said handle and finger grip member adjacent said aforementioned arm portion in an upper fixed arm, lower slidable arm relationship whereby pivoting said handle and finger grip member toward the handle and finger grip portion of said rigid member causes the slidable arm to move, said slidable arm having a first slide surface thereon along the top thereof matched to the aforementioned slide surface on the arm portion of said rigid member, said slidable arm having at least one second slide surface on the bottom thereof at the butt end thereof matched to the hereinafter defined slide surface on the shoulder portion of said rigid member; said shoulder portion being bifurcated into upper and lower legs with the upper leg thereon being the arm portion of said rigid member, the lower leg thereon having thereon a slide surface matched to the said second slide surface on said slidable arm, the upper and lower legs on said shoulder portion providing therebetween above and below a slide slot into which the butt end of the slidable arm fits and wherein the slidable arm slides; and, a pivotable jaw member hingedly attached to said slidable arm at the front end thereof opposite the fixed jaw within the obtuse angle therefrom, opening and closing to said fixed jaw as said slidable arm is caused to slide by pivoting movement of said handle and grip member.
Claim 3
Dependent Claim
30 words
The forceps of claim 1 wherein said second slide surface on said slidable arm and the slide surface on said lower leg of the bifurcated shoulder portion are stepped surfaces.
Claim 4
Dependent Claim
72 words
The forceps of claim 1 wherein: (a) the butt portion of said slidable arm contains a pivot slot which is intersected by a pin opening; (b) said handle member contains a lug which fits pivotally within said pivot slot and is intersected by a pin opening; and, (c) a locking pin member which fits within both said pin openings thereby locking together said slidable arm and said handle and finger grip member.
Claim 5
Dependent Claim
24 words
The microdisc forceps of claim 3 wherein said locking pin member locking said slidable arm to said handle and finger grip member is removable.
Claim 6
Dependent Claim
447 words
A forceps of the alligator jaw type having an improved anti-twist construction comprising: a rigid member formed overall in the general shape of an obtuse angle with a shoulder portion at the angle, a handle and finger grip portion as one leg of the angle, hereinafter termed the rear leg, and an arm portion as the forward leg of the angle said arm portion having a slide surface thereon and a fixed jaw at the forward end of said arm portion; a handle and finger grip member positioned within the obtuse angle pivotally secured as hereinafter defined to the shoulder portion of said rigid member opposing the handle and finger grip rear leg; a slidable arm positioned within the obtuse angle locked at the butt end thereof to said handle and grip member adjacent said aforementioned arm portion in an upper fixed arm, lower slidable arm relationship whereby pivoting said handle and finger grip member toward the handle and finger grip portion of said rigid member causes the slidable arm to move, said slidable arm having a first slide surface thereon along the top thereof matched and positioned relative to the aforementioned slide surface on the arm portion of said rigid member to slide thereon, said slidable arm having at least one second slide surface on the bottom thereof at the butt end thereof matched and positioned relative to the hereinafter defined slide surface on the shoulder portion of said rigid member to slide thereon; said shoulder portion being bifurcated into upper and lower legs, the upper leg thereon being the arm portion of said rigid member, the lower leg having thereon a slide surface matched and located relative to said second slide surface on said slidable arm for sliding purposes, the upper and lower legs providing therebetween above and below a slide slot into which the butt end of said slidable arm fits and wherein said slidable arm slides; a lug on said handle and finger grip member, and a pivot slot in said shoulder portion and in the butt end of said slidable arm wherein said lug is disposed, a pin opening through said shoulder portion intersecting said lug and pivot slot of said butt end, and a locking pin positioned in said pin opening thereby pivotally securing said handle and finger grip member to said shoulder portion and locking said handle and finger grip member to said slidable arm; and a pivotable jaw member hingedly attached to said slidable arm at the front end thereof opposite the fixed jaw, opening and closing to said fixed jaw appropriately when said slidable arm is caused to slide by pivoting movement of said handle and grip member.
Claim 7
Dependent Claim
447 words
A forceps of the alligator jaw type having an improved anti-twist construction comprising: a rigid member formed overall in the general shape of an obtuse angle with a shoulder portion at the angle, a handle and finger grip portion as one leg of the angle, hereinafter termed the rear leg, and an arm portion as the forward leg of the angle said arm portion having a slide surface thereon and a fixed jaw at the forward end of said arm portion; a handle and finger grip member positioned within the obtuse angle pivotally secured as hereinafter defined to the shoulder portion of said rigid member opposing the handle and finger grip rear leg; a slidable arm positioned within the obtuse angle locked at the butt end thereof to said handle and grip member adjacent said aforementioned arm portion in an upper fixed arm, lower slidable arm relationship whereby pivoting said handle and finger grip member toward the handle and finger grip portion of said rigid member causes the slidable arm to move, said slidable arm having a first slide surface thereon along the top thereof matched and positioned relative to the aforementioned slide surface on the arm portion of said rigid member to slide thereon, said slidable arm having at least one second slide surface on the bottom thereof at the butt end thereof matched and positioned relative to the hereinafter defined slide surface on the shoulder portion of said rigid member to slide thereon; said shoulder portion being bifurcated into upper and lower legs, the upper leg thereon being the arm portion of said rigid member, the lower leg having thereon a slide surface matched and located relative to said second slide surface on said slidable arm for sliding purposes, the upper and lower legs providing therebetween above and below a slide slot into which the butt end of said slidable arm fits and wherein said slidable arm slides; a lug on said handle and finger grip member, and a pivot slot in said shoulder portion and in the butt end of said slidable arm wherein said lug is disposed, a pin opening through said shoulder portion intersecting said lug and pivot slot of said butt end, and a locking pin positioned in said pin opening thereby pivotally securing said handle and finger grip member to said shoulder portion and locking said handle and finger grip member to said slidable arm; and a pivotable jaw member hingedly attached to said slidable arm at the front end thereof opposite the fixed jaw, opening and closing to said fixed jaw appropriately when said slidable arm is caused to slide by pivoting movement of said handle and grip member.
Claim 8
Dependent Claim
17 words
The forceps of claim 5 wherein said locking pin is removable for ready disassembly of the forceps.
Claim 9
Dependent Claim
32 words
The forceps of claim 5 wherein the slide surface on said other leg of the bifurcated shoulder portion is stepped and the second slide surface on said slidable arm is correspondingly stepped.
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) | 1986-01-24 | 1986-07-26 | 1987-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-24 | 1990-07-26 | 1991-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-24 | 1994-07-26 | 1995-01-25 | $7700.00 | Window Closed / Lapsed |