US2299267A

US2299267A - Tool holder for surgical instruments

Info

Publication number: US2299267A
Application number: US393315A
Authority: US
Inventors: Fisher Samuel Lloyd
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-06-11
Filing date: 1941-05-14
Publication date: 1942-10-20
Anticipated expiration: 1959-10-20

Description

S. L. FISHER TOOL HLDR FO SURGICAL INSTRUMENTS original Filed June 11, 195s oef. 2o, 1942.`

Patented Oct. 20, 1942 TOOL HOLDER FOR SURGICAL INSTRUMENTS Samuel Lloyd Fisher, Brooklyn, N. Y.

Original application June 11', 1938, Serial No. 213,115. Divided and this application May 14, 1941, Serial No. 393,315

(Cl. 12S-317) 6 Claims.

This invention relates to surgical instruments in general and more especially to devices used in the medical profession in the treatment of bone fractures and the like and constitutes a division of application Serial No. 213,115, filed June 11, 1938, issued June 10, 1931, as Letters Patent No. 2,244,683. l

It is an object of the present invention to provide an improved combination motor and tool holder suitable for receiving an attachment for operating a drill, Kirschner wire, saw or the like surgical instrument.

It is still another object of the present invention to provide an improved supporting guide for a Kirschner wire while being operated and the like.

These and other features, capabilities and advantages of the invention will appear from the subjoined detail description of one specific embodiment thereof illustrated in the accompanying drawing in which:

Fig. 1 is a longitudinal section of a Kirschner wire operating attachment connected to the shell of the motor;

Fig. 2 is a section on the line |5|5 of Fig. 1;

Fig. 3 is a section on the line lli-I6 of Fig. 1;

Fig. 4 is a section on the line of Fig. 1;

Fig. 5 is a fragmental elevation of a portion of the main shell before a tool operating attachment has been connected; and

Fig. 6- is a fragmental elevation of one of the guiding rods of the guide for the Kirschner wire illustrated in Fig. 1.

For high speed working such as when a Kirschner wire drill is to be operated then preferably the extension 39 of the shell has connected thereto an intermediate connecting device including a shell 40 on which there is rotatably mounted the intermediate shaft element 4| having slots 42 with cammed jaws to receive the pins 25 of the shaft of the motor in the shell The intermediate shaft element 4| has a similar set of slots 43 with similar cammed jaws. The intermediate shaft element 4| is further anchored to rotate in the shell 40 by the screw 44 extending through the extension 30 and the shell 40 and then into the annular slot 45 of the intermediate shaft element 4|.

From the foregoing, it will be seen that the intermediate shaft element 4| will normally rotate with the shaft of the motor. On the other hand, when the motor is at rest and it is desired to anchor the intermediate shaft element 4| against rotation, the stop 46 is provided which extends through the extensionl 39 and shell 40 `but is normally retained out of engagement with the intermediate shaft element 4| by the spring 4'|. Its inner end, however.. is adapted to be pressed into engagement with one of the slots 42 to anchor the same against rotation when certain adjustments or assemblies are to be made hereinafter to be described. i n

The shell 40, see particularly Fig. 18, is provided with cam slots 48 to receive` suitable pins for connecting the shell 40 to the tool to be operated.

In Fig. 1, the slots 43 of the intermediate portion 4| receive the pins 88 of the spindle 80 which is rotatably mounted in the chambered block 90. For securing the chambered block to the extension 40 a pin 9| is provided in the ring 8l. By manipulation of the

projections

84, 85 and 86, the pin 0| may be moved over into the innermost position lof the cam slot 48 for anchoring the block to the extension 40.

Preferably, as shown, when the spindle 80 is intended directly to engage the tool to be manipulated, there will be provided integral with the spindle 89 a chambered extension 92 having an external screw thread 93 to receive the clamping nut 94. The extension 92 is conformed to receive in the present instance three jaw elements 05 having cam faces 96 to cooperate with the inner cam faces of the clamping nut 94 and to receive between the three jaws 95 the drilling rod 0l or other drilling tool. The drilling rod in the present instance is shown as typical of the Well known Kirschner bone drilling wire.

Since the length of the Kirschner Wire 91 is not infrequently very considerable, in order to support the same while it is being rotated in the act of drilling, the supporting device now to be described is provided.

In order to frictionally anchor the guiding rods |05 in the guiding elements |03 and, in

turn, the guiding elements |03 in the guiding elements IIlI preferably, see Fig. 19, slots are formed as an instance the slots |09 and III) with an intervening tongue III depressed resiliently to engage a rod element and similarly the elements IOI provided with slots II2 and II3 with an intervening tongue II4 depressed resiliently to engage a guiding element |03.

When the wire drill is used, it is particularly desirous to have the Wire 91 drill through a bone in a perfectly straight path since experience has taught that in such cases the accompanying pain to the patient when traction is made may be reduced to a minimum if not entirely .eliminated. With the present guiding elements IIlI, |53 and IE5 and the combination motor holder and instrument attachment, the operating surgeon is merely called upon to hold the motor steady after making contact. After the wire 91 has so been drilled through the bone, the ordinary Kirschner horse-shoe clamp may be used to maintain the wire stretched in a straight line 'and then the weight attached to the horse-shoe clamp in the usual way.

Before the horse-shoe clamp aforesaid is attached in order to remove a Wire 91 from the drilling attachment in some instances, the same is cut off leaving a small portion in Vthe drilling attachment. In other cases, the guiding elements IIlI, |03 and |05 are moved away from the shell I to clear the ring 81 whereupon the

projections

84, 85 and 86 are engaged and turned. 'I'o prevent the wire 91 from turning during this procedure, the motor is -rst shut off and then the stop pin 46 engaged and pressed to enter one of the slots 42 whereupon the ring 81 can with facility be turned, and thereupon .the guiding elements `|0I, |03, |05 and wire drill attachment removed whereupon the clamping nut 94 can be turned to release the jaws 95 or else the nut 94 tur-ned to release the jaws 95 before the ring 81 is turned.

I claim:

1. The combination of an electric motor having a shaft, a shell enclosing said motor and having a tubular extension for said motor shaft, a bone drilling wire, a removable unit mounted on said extension and including means for anchoring one end of said wire to said motor shaft, said removable unit 'also including a locking ring for anchoring said unit to said extension and having a plurality of projections to facilitate manipulation thereof, said unit also including a guiding device having la plurality of cylindrical. opening forming projections extending axially therewith and outside thereof, .and a plurality of sets of tubes telescoping into one another and slidably mounted in the Aprojections of said .guiding device, each set having a transversely extending supporting bracket, the brackets being parallel to one another and yprovided with Valined openings to receive said wire and thereby support the same during the rotary movement thereof, the projections of :said locking ring corresponding in number tothe telescoping tubes of a set and being spaced from one another to clear` the tubes during the telescoping operation.

2. The combination `of an electric motor having a shaft, a shell enclosing said motor and having a tubular extension for said shaft, a bone drilling wire, a removable unit including a chuck for operatively associating the end of said Wire to said shaft, said unit also including a guiding device having a plurality of sets of tubes telescoping into one another in front of said shell and outside of said extension, the tubes of each set being parallel to one another and substantially equidistant from one another and from a common center, and a transversely extending supporting bracket for each set of tubes, the brackets being parallel to one another and provided with central openings registering with said common center to receive said Wire and thereby support the same during the rotary movement thereof.

3. The combination of an electric motor having a shaft, a shell enclosing said motor and having a tubular extension for said motor shaft, a bone drilling Wire, a removable unit including a chuck for operatively associating one end of said wire to said motor shaft, said removable unit including a locking ring for anchoring said unit to said extension and having a plurality of projections to facilitate manipulation thereof, said unit also including a guiding device having a plurality of sets of tubes telescoping into lone another, the

tubes of each set being parallel to one another, and a transversely extending supporting bracket for each set of tubes, the'brackets being parallel to one another and provided with central openings to receive said wire andrthereby support the same during the rotary movement thereof, the projections of said locking ring corresponding in number to the telescoping tubes of a set and being spaced from one another to clear the tubes during the telescoping operation.

4. In a surgical instrument, the combination of a main shell having a cylindrical projection for receiving an electric motor with its shaft protruding into sai-d projection, a bearing removably connected to said projection, a second shaft in said bearing, an intermediate connecting shaft in said bearing for operatively associating said second shaft with the motor shaft, tool gripping jaws on said second shaft, a Kirschner wire, a lock nut operatively associating said jaws and clamping the end of `said wire in said jaws, a guiding device operatively associated with said bearing and including a plurality of cylindrical opening forming projections extending axially therewith mounted on said projection in front of said shell, and a plurality of sets of tubes telescoping into one another and slidably mounted in the projections in said guiding device, each set having a transversely extending supporting bracket, the brackets being parallel to one `another and provided with central openings to receive said wire and thereby support the same during the rotary movement thereof.

5. In a surgical instrument, the combination of a main shell having a cylindrical projection for receiving 'an electric motor with its shaft protruding into said projection, a bearing removably connected to said projection, a second shaft in said bearing, an intermediate connecting shaft in said bearing for operatively associating Ysaid second shaft with the motor shaft, tool gripping jaws on said second shaft, a Kirschner wire, la lock nut operatively associating said jaws and clamping the end of said wire in said jaws, Va guiding device operatively associated ywith said bearing and including a plurality of cylindrical opening forming projections extending axially therewith mounted on said projection in front of said shell, and a plurality of sets .of tubes telescoping into one another and slidably mounted in the projections in said device, each set having a transversely extending supporting bracket, the brackets being parallel to one another and provided with central openings to receive-said Wire and thereby support the same during the rotary movement thereof, the tubes being slit With tongues formed thereby frictionally to engage one another in their successive adjusted positions.

6. In a surgical instrument, the combination of a main shell having a cylindrical projection for receiving an electric motor With its shaft protruding into said projection, an intermediate bearing removably connected to said projection, a main bearing, a lock nut for connecting said main bearing to said intermediate bearing, said lock nut having a plurality of projections to facilitate manipulation thereof, a second shaft in said main bearing, an intermediate connecting shaft in said intermediate bearing for operatively associating said second shaft with the motor shaft, tool gripping jaws on said second shaft, a bone drilling Wire, a second lock nut operatively engaging said jaws and clamping the end of said wire in said jaws, a guiding device operatively associated with said main bearimg and including a plurality of cylindrical opening forming projections extending axially therewith mounted on said projection in front of said shell, and a plurality of sets of tubes telescoping into one another and slidably mounted in the projections in said device, each set having a transversely extending supporting bracket, the brackets being parallel to one another and provided with alined openings to receive said Wire `and thereby support the same during the rotary movement thereof, the projections of said first lock nut corresponding in number to the telescoping tubes of a set and being spaced from one another to clear the same during the telescoping operation.

SAMUEL LLOYD FISHER.