Sharply angled kelly (Jacobs) clamp

• US 5,443,480 A
• Filed: 04/19/1993
• Issued: 08/22/1995
• Est. Priority Date: 05/10/1990
• Status: Expired due to Term

• Current Assignee: Symbiosis Corporation (Boston Scientific Corporation)
• Original Assignee: Symbiosis Corporation (Boston Scientific Corporation)
• Inventors: Jacobs, Moises, Slater, Charles R., Smith, Kevin W.
• Primary Examiner(s): Cohen, Lee S.
• Assistant Examiner(s): GILBERT, SAMUEL G
• Application Number:
  US08/049,633
• Time in Patent Office: 855 Days
• Field of Search: 128/749, 128/751, 606/205-208, 606/170, 606/171, 606/174, 606/142, 606/190
• US Class Current: 606/207
• CPC Class Codes: A61B 10/06 Biopsy forceps , e.g. with cup-shaped jaws
• CPC Class Codes: A61B 17/29 Forceps for use in minimally invasive surgery
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• CPC Class Codes: A61B 17/3201 Scissors for biopsy A61B10/02
• CPC Class Codes: A61B 18/1445 at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
• CPC Class Codes: A61B 2017/00398 using powered actuators, e.g. stepper motors, solenoids
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable for prosthetic joint-implanting tools A61F2/4603
• CPC Class Codes: A61B 2017/0088 ceramic
• CPC Class Codes: A61B 2017/292 connection of actuating rod to handle, e.g. ball end in recess
• CPC Class Codes: A61B 2017/2926 Details of heads or jaws
• CPC Class Codes: A61B 2017/2931 with releasable head
• CPC Class Codes: A61B 2017/2939 Details of linkages or pivot points
• CPC Class Codes: A61B 2017/2945 Curved jaws
• CPC Class Codes: A61B 2018/00077 high, i.e. electrically conducting
• CPC Class Codes: A61B 2018/00083 low, i.e. electrically insulating
• CPC Class Codes: A61B 2018/00107 Coatings on the energy applicator
• CPC Class Codes: A61B 2018/00148 with metal
• CPC Class Codes: A61B 2018/1412 Blade
• CPC Class Codes: A61B 2018/1415 multiple blades
• CPC Class Codes: A61B 2018/1432 curved
• CPC Class Codes: A61B 2018/1455 : having a moving blade for cutting tissue grasped by the jaws
• CPC Class Codes: A61B 2018/146 : Scissors
• CPC Class Codes: A61B 2090/064 : for measuring force, pressure or mechanical tension
• CPC Class Codes: A61M 2205/6081 : Colour codes

Abstract

A Jacobs type curved clamping or dissector element for a disposable laparoscopic instrument is provided. The Jacobs'"'"' type end effectors generally comprises first and second pivotally mounted elongate, opposed clamp members each of which has a straight base portion, an intermediate portion extending away from the axis of the base portion and a curved distal portion which angles 70 to 90 degrees relative to the intermediate portion and which extends back toward and slightly beyond the longitudinal projection of the base portion. The clamp members note when pivotally rotated to a closed-clamp position.

Claims

1. In a surgical instrument adapted for insertion through a trocar tube and having a hollow tube with distal and proximal ends and a first longitudinal axis, a clevis coupled to the distal end of said hollow tube, first and second pivot pins, first and second elongate opposed clamp members each having a proximal base portion having a first through-hole for pivotally engaging said clevis with a respective one of said first and second pivot pins, and an actuation means extending through said hollow tube and coupled to said base portion of said first and second clamp members for effecting pivotal rotation of said clamp members, an improvement in said first and second clamp members comprising:

a) each said clamp member further including an intermediate portion and a distal portion integral with said base portion, said intermediate portion and said distal portion of said second clamp member being substantially a mirror image of said intermediate portion and said distal portion of said first clamp member, each said base portion having a second longitudinal axis substantially parallel said first longitudinal axis, each said intermediate portion angling away from said second longitudinal axis of said base portion at an angle of between about 5 to 20 degrees, and each said distal portion angling back toward and past said first longitudinal axis at an angle of between about 70 to 90 degrees relative thereto, wherein at least a portion of said intermediate portion extends along a horizontal axis perpendicular to said first longitudinal axis beyond a longitudinal projection of said base portion in a first direction, and at least a portion of said distal portion extends along said horizontal axis beyond the longitudinal projection of said base portion in a second direction opposite said first direction.

2. The improvement according to claim 1, wherein:

each said clamp member is an integral curvalinear element.

3. The improvement according to claim 2, wherein:

each said clamp member traverses a distance of approximately 10 millimeters along said horizontal axis.

4. The improvement according to claim 1, wherein:

each said clamp member has a clamping surface, and each clamping surface has grooves, wherein the grooves of said distal portions are at an angle of between about 0 to 20 degrees relative to said first longitudinal axis, and wherein the grooves of said intermediate portions are at an angle of between 70 to 90 degrees relative to said first longitudinal axis.

5. The improvement according to claim 4, wherein:

each said clamp member is an integral curvalinear element, and

said base portions and said distal portions each have lengths which are about 0.25 to 0.5 the length of said intermediate portions.

6. The improvement according to claim 5, wherein:

said actuation means in said surgical instrument comprises a push rod extending through said hollow tube and connecting means for connecting said push rod to said base portions of said first and second clamp members, said connecting means being coupled to said push rod and to said base portions of said first and second clamp members, and

each said base portion includes means for coupling to said connecting means.

7. The improvement according to claim 1, wherein:

said base portions and said distal portions each have lengths which are about 0.25 to 0.5 the length of said intermediate portions.

8. The improvement according to claim 1, wherein:

said actuation means in said surgical instrument comprises a push rod extending through said hollow tube and connecting means for connecting said push rod to said base portions of said first and second clamp members, said connecting means being coupled to said push rod and to said base portions of said first and second clamp members, and

each said base portion includes means for coupling to said connecting means.

9. An endoscopic Jacobs type curved clamp apparatus, comprising:

a) a hollow tube having a first end, a second end, and a longitudinal axis;

b) a clevis mechanically coupled to said first end of said hollow tube;

c) first and second pivot pins;

d) first and second elongate opposed clamp members, each clamp member having a proximal base portion, an integral intermediate portion, and an integral distal portion, said intermediate portion and distal portion of said second clamp member being substantially a mirror image of said intermediate portion and distal portion of said first clamp member,

each said base portion having a first through-hole pivotally engaging said clevis with a respective one of said first and second pivot pins, each said intermediate portion angling away from said longitudinal axis in a first direction, and

each said distal portion angling back toward and past said longitudinal axis at an angle of between about 70 to 90 degrees relative thereto, wherein at least a portion of said distal portion extends along a horizontal axis perpendicular to said longitudinal axis beyond a longitudinal projection of said base portion in a second direction;

e) a rod extending at least partially through said hollow tube and having a first end and a second end, said rod being coupled to said first and second elongate opposed clamp members; and

f) actuating means engaged to said second end of said rod for imparting reciprocal motion to said rod relative to said hollow tube which reciprocal motion is translated into pivotal motion of said pivotally engaged opposed clamp members.

10. An endoscopic Jacobs type curved clamp apparatus according to claim 9, wherein:

said intermediate portion extends along said horizontal axis beyond said longitudinal projection of said base in a third direction opposite to said second direction.

11. An endoscopic Jacobs type curved clamp apparatus according to claim 10, wherein:

each said clamp member is an integral curvalinear element.

12. An endoscopic Jacobs type curved clamp apparatus according to claim 11, wherein:

each said clamp member traverses a distance of approximately 10 millimeters along said horizontal axis.

13. An endoscopic Jacobs type curved clamp apparatus according to claim 10, wherein:

each of said opposed clamp members has a clamping surface, and

each said clamping surface has grooves, wherein

the grooves of said distal portions are at an angle of between about 0 to 20 degrees relative to said first longitudinal axis, and wherein the grooves of said intermediate portions are at an angle of between 70 to 90 degrees relative to said first longitudinal axis.

14. An endoscopic Jacobs type curved clamp apparatus according to claim 13, wherein:

each said clamp member is an integral curvalinear element, and

each said intermediate portion has a first length, and said base portions and said distal portions each have second and third lengths which are each about 0.25 to 0.5 the length of said first length.

15. An endoscopic Jacobs type curved clamp apparatus according to claim 10, wherein:

each said intermediate portion has a first length, and said base portions and said distal portions each have second and third lengths which are each about 0.25 to 0.5 the length of said first length.