Surgical gripping forceps

• US 9,700,335 B2
• Filed: 08/23/2007
• Issued: 07/11/2017
• Est. Priority Date: 08/30/2006
• Status: Active Grant

• Current Assignee: Karl Storz Se & Co. Kg
• Original Assignee: Karl Storz Se & Co. Kg
• Inventors: Ganter, Hans, Reinauer, Josef
• Primary Examiner(s): Severson, Ryan J
• Application Number:
  US12/438,359
• Publication Number:
  US 20100023050A1
• Time in Patent Office: 3,610 Days
• Field of Search: 606205-207
• CPC Class Codes: A61B 17/29 Forceps for use in minimally invasive surgery
• CPC Class Codes: A61B 2017/2931 with releasable head
• CPC Class Codes: A61B 2017/2933 camming or guiding means
• CPC Class Codes: A61B 2017/2936 Pins in guiding slots
• CPC Class Codes: A61B 2017/2939 Details of linkages or pivot points

Abstract

Surgical gripping forceps are provided with one or two gripping jaws movable relative to a main body, wherein each moveable one of the gripping jaws has a pivot pin, fixed in position relative to the main body, and a lever arm. The lever arms are articulated via at least one push element. For this purpose each movable one of the gripping jaws has its own pivot pin. From the midline of the main body, the individual pivot pin has at least a distance greater than 38% of the maximum width of the main body or maximum diameter of the main body. The microsurgical gripping forceps operate with customary force for actuating the forceps, and permit a substantial applied clamping force.

Claims

1. A surgical gripping forceps apparatus, said apparatus comprising:

(a) a main body comprising a fork segment with two fork arms; and

(b) at least two separate gripping jaws extending outwardly from said main body, wherein each of said gripping jaws is movably arranged relative to said main body, and wherein said movable gripping jaws each further comprise a pivot pin extending sidewardly fixed in position relative to said main body, said pivot pin having at least a distance from a common central line extending lengthwise through said main body greater than thirty-eight percent (38%) of the maximum width of said main body; and

(c) a lever arm articulating each separate said gripping jaw via at least one separate push element extending from opposing sides of said lever arm.

2. The surgical gripping forceps apparatus in accordance with claim 1, wherein each of said gripping jaws extends outward from, and is movably arranged relative to, said main body, each of said gripping jaws comprising:

(a) a pivot axis fixed in place relative to said main body, said pivot axis having a distance from said common central line of said main body at least more than said thirty-eight percent (38%) of said maximum width of said main body; and

(b) a lever arm articulated via said at least one push element.

3. The surgical gripping forceps apparatus in accordance with claim 2, wherein each of said pivot axes for each of a corresponding movable gripping jaw is arranged parallel to each other of said axes.

4. The surgical gripping forceps apparatus in accordance with claim 2, wherein said pivot axis of each of said movable gripping jaws lies in a plane oriented normal to said central line of said main body.

5. The surgical gripping forceps apparatus in accordance with claim 2, wherein said pivot axis of each of said movable gripping jaws is formed by a respective pivot pin at a corresponding side of said gripping jaw and a cavity at a side of said main body.

6. The surgical gripping forceps apparatus in accordance with claim 5, wherein said cavity at said main body side only partly encloses each respective said pivot pin at said corresponding side of said gripping jaw.

7. The surgical gripping forceps apparatus in accordance with claim 5, wherein each of said movable gripping jaws comprises:

a guide cavity proximate said pivot pin, and wherein said guide cavity has at least one curved edge forming a circular arc about said pivot axis of said pivot pin.

8. The surgical gripping forceps apparatus in accordance with claim 7, wherein said edge of said guide cavity is braced against a guide bolt mounted in said main body.

9. The surgical gripping forceps apparatus in accordance with claim 1, and wherein:

at least one of said push elements capable of articulating one or more of each of said movable gripping jaws.

10. The surgical gripping forceps apparatus in accordance with claim 9, wherein said push elements are configured to be guided by said main body in at least two directions.

11. The surgical gripping forceps apparatus in accordance with claim 1, wherein said main body and said push element form a sliding pair, and wherein said push element is non-twistably mounted in said main body.

12. The surgical gripping forceps apparatus in accordance with claim 1, wherein said main body, said push element, and said gripping jaws form at least one rocking slider crank, an individual link cavity of each of said slider cranks being each arranged on a lever arm of a respective movable one of said gripping jaws.

13. The surgical gripping forceps apparatus in accordance with claim 1, and further comprising:

a push element in said main body, said push element capable of articulating one or more of each of said movable gripping jaws; and

wherein said push element is configured to be guided by said main body in at least two directions within a bore of said main body and between fork arms of said main body.

14. The surgical gripping forceps apparatus in accordance with claim 1, wherein each of said gripping jaws extends outward from, and is movably arranged relative to, said main body, each of said gripping jaws comprising:

(a) a pivot axis fixed in place relative to said main body, said pivot axis having a distance from said common central line of said main body at least more than thirty-eight percent (38%) of a maximum width of said main body; and

(b) a lever arm articulated via at least one push element;

wherein said pivot axis of each of said movable gripping jaws is formed by a pivot pin at a corresponding side of said gripping jaw and a cavity at a side of said main body; and

wherein said cavity at said main body side only partly encloses said pivot pin at said corresponding side of said gripping jaw.

15. The surgical gripping forceps apparatus in accordance with claim 1, wherein each of said gripping jaws extends outward from, and is movably arranged relative to, said main body, each of said gripping jaws further comprising:

(a) a pivot axis fixed in place relative to said main body, said pivot axis being a distance from said common central line of said main body at least thirty-eight percent of a maximum width of said main body; and

(b) a lever arm being articulated via at least one push element;

wherein said pivot axis of each of said movable gripping jaws is formed by a pivot pin extending outwardly at a corresponding side of said gripping jaw and a respective cavity at a side of said main body; and

wherein at least one of said movable gripping jaws comprises;

a guide cavity proximate said push element, wherein said guide cavity has at least one curved edge forming a circular arc about a pivot axis of said push element, and said edge of said guide cavity is braced against a guide bolt mounted in said main body.

16. A forceps apparatus, said apparatus comprising:

a main body, said main body further comprising;

(a) a tube segment, said tube segment comprising;

(i) a central bore in which a push element is slidably guided therethrough to effect actuation of the forceps apparatus; and

(ii) a plurality of adapter elements located at a rear end of said tube segment, said adapter elements being situated in a fixed relationship to one another about outer portions of said tube segment, and wherein said main body is capable of being detachably fastened to a housing tube;

(b) a fork segment having at least two fork arms, each of said fork arms being arranged extending parallel from said tube segment; and

a pair of gripping jaws connected to and extending outwardly from said main body, wherein said gripping jaws are movably arranged relative to said main body and a lever arm, and wherein said two movable gripping jaws each further comprises a pivot pin extending sidewardly on opposing sides thereof and fixed in position relative to said main body, said gripping jaws capable of gripping an object under direction of an apparatus user; and

a lever arm articulating each separate said gripping jaw via at least one separate push element extending from opposing sides of said lever arm.

17. The forceps apparatus in accordance with claim 16, wherein each of said gripping jaws extends outward from, and is movably arranged relative to, said main body, each of said gripping jaws comprising:

(a) a pivot axis fixed in place relative to said main body, said pivot axis having a distance from a common central line extending lengthwise through said main body at least thirty-eight percent of a maximum width of said main body.

18. The surgical gripping forceps apparatus in accordance with claim 17, wherein said main body, said push element, and said gripping jaws form at least one rocking slider crank, wherein an individual link cavity of each of said at least one slider crank is arranged on a lever arm of a respective movable one of said gripping jaws.

19. A surgical gripping forceps apparatus, said apparatus comprising:

(a) a main body comprising a fork segment;

(b) said fork segment comprising two fork arms;

(c) each of said two fork arms having a central bore aligned with each other and providing a common central line extending lengthwise through the main body and between said two fork arms;

(d) a first of said two fork arms having a recess above said bore and a second of said two forks arms having a recess below said bore;

(e) at least two gripping jaws extending outwardly from said main body, wherein both of said gripping jaws are movably arranged relative to said main body, and wherein said two movable gripping jaws each further comprises;

(i) a fixed pivot pin extending sidewardly and lying in the respective recess of a fork arm; and

(ii) a link cavity beneath said pivot pin;

(f) a lever arm having a plurality of link pins directed outwardly on opposing sides of the lever arm in opposite directions, a first of said link pins being arranged to fit in a link cavity of the first gripping jaw and a second of said link pins of the lever arm being arranged to fit in a link cavity of the second gripping jaw.

20. A surgical gripping forceps apparatus, said apparatus comprising:

(a) a main body comprising a fork segment with two fork arms; and

(b) at least two gripping jaws extending outwardly from said main body, wherein said gripping jaws are movably arranged relative to said main body, and wherein said two movable gripping jaws each further comprises;

(i) a pivot pin extending sidewardly fixed in position relative to said main body, said pivot pin having at least a distance from a line extending lengthwise therethrough said main body at a position greater than thirty-eight percent (38%) of a maximum width of said main body;

(ii) a lever arm articulated via at least one push element; and

(c) a guide cavity proximate said pivot pin, wherein said guide cavity has at least one curved edge forming a circular arc about said pivot axis of said pivot pin, and said edge of said guide cavity is braced against a guide bolt mounted in said main body;

wherein said pivot axis of each of said movable gripping jaws is formed by said pivot pin at a corresponding side of said gripping jaw and said cavity at a side of said main body.

21. The surgical gripping forceps apparatus, in accordance with claim 20, wherein at least one of said gripping jaws is non-movable relative to said main body.

22. The surgical gripping forceps apparatus in accordance with claim 20, wherein said main body and said push element form a sliding pair, and wherein said push element is non-twistably mounted in said main body.

23. The surgical gripping forceps apparatus in accordance with claim 20, wherein said main body, said push element, and said gripping jaws form at least one rocking slider crank, an individual link cavity of each of said at least one slider crank being each arranged on said lever arm of a respective movable one of said gripping jaws.