MEDICAL, IN PARTICULAR SURGICAL, SLIDING-SHAFT INSTRUMENT

• US 20150209060A1
• Filed: 08/28/2013
• Published: 07/30/2015
• Est. Priority Date: 09/04/2012
• Status: Active Grant

• Current Assignee: Waldemar Link GmbH & Co. KG
• Original Assignee: Waldemar Link GmbH & Co. KG
• Inventors: Dmuschewsky, Klaus
• Granted Patent: US 9,724,117 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 17/00234 for minimally invasive surgery A61B17/0218, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/1608 the two jaw elements being linked to two elongated shaft elements moving longitudinally relative to each other
• CPC Class Codes: A61B 17/29 Forceps for use in minimally invasive surgery
• CPC Class Codes: A61B 17/2909 Handles
• CPC Class Codes: A61B 2017/2902 characterized by features of the actuating rod
• CPC Class Codes: A61B 2017/2916 pins in guiding slots
• CPC Class Codes: A61B 2017/2917 with flexible part
• CPC Class Codes: A61B 2017/292 connection of actuating rod to handle, e.g. ball end in recess
• CPC Class Codes: A61B 2017/2924 Translation movement of handle without rotating movement
• CPC Class Codes: A61B 2017/2944 Translation of jaw members
• CPC Class Codes: A61B 2017/2947 Pivots
• CPC Class Codes: A61B 2090/0813 Accessories designed for easy sterilising, i.e. re-usable

Abstract

A medical slidin -shaft instrument havin a first handle arm a second handle arm pivotably mounted to the first handle arm, a shaft connected to the first handle arm and a slider coupleable to the second handle arm and axially displaceable on the shaft. The slider is removable from the shaft and is guided along a sliding path. A cross-pin couples the second handle arm to the slider and is received in a slot defined by first and second legs of the second handle arm. The first leg is a resilient tongue moveable transversely to a longitudinal axis of the first leg and outwardly away from the second leg. The second handle arm is positioned so that the cross pin lies in the slot. The cross pin is covered and held back by the first leg and is released by applying a force and displacing the end of the first leg.

Claims

1. A medical sliding-shaft instrument comprising:

a first handle arm;

a second handle arm pivotably mounted with respect to the first handle arm;

a shaft element connected to the first handle arm;

a slider that is axially displaceable on the shaft element and is able to be coupled to the second handle arm, wherein the slider is removable from the shaft element in a retracted proximal end position of the slider'"'"'s sliding path and in the proximal end position of additional regions of the slider'"'"'s sliding path is displaced in the direction of a pushed-forward distal end position and wherein the slider is guided inseparably on the shaft element;

a cross pin arranged on the slider is accommodated in a first slot of the first handle arm, wherein the first slot is open at the end and is bordered by two legs for coupling the second handle arm to the slider, wherein a first leg of the two legs bordering the first slot is formed as a resilient tongue that is movable outwardly and away from the second one leg of the two legs across the first leg'"'"'s longitudinal extent;

wherein the second handle arm is positioned in the proximal end position so that the cross pin lies in the first slot and is at least partially covered and retained by the first leg, formed as a resilient tongue in a release direction, which is generally perpendicular from an axial line of the shaft element in the direction of the slider, and the cross pin is releasable from the slot by applying a releasing force in the release direction with displacement of an end of the first leg out of the slot, directed against the spring force of the resilient tongue, and wherein a lug is arranged on the proximal end of the slider, this lug protruding in the proximal end position beyond a proximal end of the shaft element and by means of which the releasing force acting in the release direction is able to be applied to the slider.

2. The sliding-shaft instrument according to claim 1, further comprising a V-shaped or wedge-shaped widened area at an open end of the first slot.

3. The sliding-shaft instrument according to claim 1, further comprising a slot-widened area (24) in the form of a circular segment formed at a base of the first slot between the two legs.

4. The sliding-shaft instrument according to claim 1, wherein the second leg is a rigid leg.

5. The sliding-shaft instrument according to claim 1, wherein, on activation of the first and second handle arms into a first operating direction, the second leg transfers a force for moving the slider in the direction of the distal end position to the cross pin, wherein the first leg transfers a force to the cross pin for moving the slider in the direction of the proximal end position, and wherein the first leg applies a force to the cross pin in operation of the first and second handle arms in a second direction of operation.

6. The sliding-shaft instrument according to claim 1, wherein a finger recess is shaped into a surface of the second handle arm on a side facing the first handle arm.

7. The sliding-shaft instrument according to claim 1, wherein a finger loop is formed on a free end of each of the first and second handle arms.

8. The sliding-shaft instrument according to claim 1, wherein the second handle arm is releasably connected to the first handle arm or the shaft element.

9. The sliding-shaft instrument according to claim 1, wherein a first stationary blade is formed on the distal end of the shaft element, and furthermore, a second blade movable relative to the first blade is also arranged there, is coupled to the slider in such a way that with a displacement of the slider in the axial direction, the blades move toward or away from one another.

10. The sliding-shaft instrument according to claim 1, further comprising a second slot, which is open at the end in the region of the first slot extending between the first leg and a third leg, wherein the first leg, when it is moved outward away from the second leg across its direction of longitudinal extent, is at the same time moving toward the third leg, and the third leg forms a stop, limiting the path of movement of the first leg.

11. The sliding-shaft instrument according to claim 10, wherein the second slot runs parallel to the first slot and extends essentially over the same length into the material of the second handle arm as the first slot.

12. The sliding-shaft instrument according to claim 10, wherein the third leg is a rigid leg.

13. The sliding-shaft instrument according to claim 1, wherein the longitudinal slot, in a region near the slot'"'"'s free open end, has a circular widened area whose diameter corresponds to a diameter of the cross pin.