Laparoscopic device
First Claim
Patent Images
1. A laparoscopic instrument assembly having a disposable tip said assembly including:
- actuator means comprising a tubular sheath structure having an actuator rod having a forward end and a rear end disposed for axial movement therein;
means disposed adjacent the rear end of said actuator rod for moving said actuator rod axially within said sheath;
said actuator rod having a continuous internal thread formed therein at the forward end thereof;
said sheath structure further having a continuous external thread formed therein adjacent said rod forward end;
replaceable tip means comprising a tip rod having a rear end disposed for axial movement within a tubular tip casing structure said tip casing having a rear end;
said tip rod having a plurality of external threads formed on the rear end thereof for mating engagement with said actuator rod internal threads; and
said tip casing structure having a plurality of internal threads at the rear end adjacent said rear end of said tip rod for mating engagement with said external threads of said sheath structure;
said tip rod in its rearwardmost position locating a first thread on said tip rod a first predetermined distance from a first thread on said tip casing structure, and said actuating rod in its rearwardmost position locating a first thread on said actuating rod a second predetermined distance from said first thread on said sheath structure, said first predetermined distance being greater than said second predetermined distance;
whereby assembly of said replaceable tip on said actuator means is accomplished by the threading of said tip rod into said actuating rod prior to the threading of said sheath structure into said tip casing structure; and
an instrument disposed at the forward end of said tip casing structure operative by movement of said tip rod within said tip casing structure.
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Accused Products
Abstract
A laparoscopic instrument assembly having a removable tip attachable to an actuator, the actuator being provided with an actuator rod disposed for axial movement within a tubular sheath. The removable tip has a pair of blades forming a scissors which are moved between an open position and a closed position by axial movement of a tip rod disposed within a tubular tip casing structure. The tip rod is threaded to the actuator rod and the tip casing structure is threaded to the actuator tubular sheath, and a pair of thumb and finger grips serve to move the actuator rod within the tubular sheath.
96 Citations
19 Claims
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1. A laparoscopic instrument assembly having a disposable tip said assembly including:
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actuator means comprising a tubular sheath structure having an actuator rod having a forward end and a rear end disposed for axial movement therein; means disposed adjacent the rear end of said actuator rod for moving said actuator rod axially within said sheath; said actuator rod having a continuous internal thread formed therein at the forward end thereof; said sheath structure further having a continuous external thread formed therein adjacent said rod forward end; replaceable tip means comprising a tip rod having a rear end disposed for axial movement within a tubular tip casing structure said tip casing having a rear end; said tip rod having a plurality of external threads formed on the rear end thereof for mating engagement with said actuator rod internal threads; and said tip casing structure having a plurality of internal threads at the rear end adjacent said rear end of said tip rod for mating engagement with said external threads of said sheath structure; said tip rod in its rearwardmost position locating a first thread on said tip rod a first predetermined distance from a first thread on said tip casing structure, and said actuating rod in its rearwardmost position locating a first thread on said actuating rod a second predetermined distance from said first thread on said sheath structure, said first predetermined distance being greater than said second predetermined distance; whereby assembly of said replaceable tip on said actuator means is accomplished by the threading of said tip rod into said actuating rod prior to the threading of said sheath structure into said tip casing structure; and an instrument disposed at the forward end of said tip casing structure operative by movement of said tip rod within said tip casing structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A laparoscopic instrument assembly having a disposable tip assembly mounted on a tubular sheath structure having an actuator rod disposed for axial movement therein;
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said tip assembly comprising a tip rod disposed for axial movement within a tubular tip casing structure; a pair of cutting blades forming a scissors disposed at the forward end of said tip assembly; said cutting blades being movable to an open and closed position by rotation about a pivot pin retained in said casing structure; each of said cutting blades further having a slotted opening formed therein rearwardly of said pivot pin, said openings forming an acute angle one with the other; a yoke having a pair of forwardly extending arms formed at the forward end of said tip rod having a driving pin disposed between said yoke arms and extending through said blade slots; and means connecting said tip rod with said actuator rod whereby movement of said actuator rod is effective to move said driving pin in said blade slots causing movement of said blades between an open and closed position. - View Dependent Claims (19)
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Specification