Source: https://patents.google.com/patent/DE102004051794B4/en
Timestamp: 2019-09-23 18:47:18
Document Index: 734576088

Matched Legal Cases: ['art 51', 'art 54', 'art 52', 'art 58', 'art 56', 'art 51', 'art 51', 'art 25', 'art 304', 'art 306']

DE102004051794B4 - Coupling system for a medical dissecting tool - Google Patents
Coupling system for a medical dissecting tool
DE102004051794B4
DE102004051794B4 DE102004051794.0A DE102004051794A DE102004051794B4 DE 102004051794 B4 DE102004051794 B4 DE 102004051794B4 DE 102004051794 A DE102004051794 A DE 102004051794A DE 102004051794 B4 DE102004051794 B4 DE 102004051794B4
DE102004051794.0A
DE102004051794A1 (en
2003-10-31 Priority to US10/698,638 priority Critical patent/US7641655B2/en
2003-10-31 Priority to US10/698638 priority
2005-07-28 Publication of DE102004051794A1 publication Critical patent/DE102004051794A1/en
2019-07-04 Publication of DE102004051794B4 publication Critical patent/DE102004051794B4/en
A medical dissecting tool coupling system (18, 138), the coupling system (102) configured to connect a power source to a dissecting tool (18, 138), comprising: a coupling shaft (122) having a proximal portion for receiving power from the dissecting tool Power source, a distal portion and a longitudinal axis (L1) passing through the proximal portion and the distal portion, the distal portion having an outer surface and an inner surface, and wherein the inner surface defines an internal passageway (308) which extends along the longitudinal axis and adapted to receive a portion of the medical dissecting tool (18, 138), and at least one first opening (302) extending from the outer surface to the inner passage (308) along a first axis perpendicular to the longitudinal axis (L1) is arranged, wherein the first opening (302) has a first length (L2) which extends along the A longitudinal axis (L1) extends between a proximal and a distal boundary, and wherein the first opening (302) has a first width (W) which extends transversely to the longitudinal axis (L1) and the first axis between two lateral boundaries, further the first length (L2) is greater than the first width (W) such that the first opening (302) takes the form of an elongated slot along the longitudinal axis (L1), and wherein the proximal boundary, the distal boundary and the two lateral boundaries extending in a direction that extends parallel to the first axis, at least one locking member (104) extending at least partially into the first opening (302) and with respect to the coupling shaft (122) from an unlocked to a locked position is movable by a first path in a direction which is at least partially parallel to the longitudinal axis (L1) to prevent the medical dissecting tool (18 , 138) moves along the longitudinal axis (L1) of the internal passageway (308), the at least one barrier member (104) being located in an unlatched position spaced from the proximal boundary and adjacent to the distal boundary of the first opening (302), and wherein the at least one locking member (104) is disposed in a locked position adjacent the proximal boundary and spaced from the distal boundary of the first opening (302), wherein an engagement sleeve (106) is provided adjacent to the distal portion the engagement sleeve (106) has an inner contact surface (106a) for engagement with the at least one locking member (104) extending at an oblique angle with respect to the longitudinal axis (L1), the engagement sleeve (106) being biased by a spring (106); 124) is urged toward the proximal portion of the coupling shaft (122), and wherein an attachment housing (120) is provided around the proximal portion of the coupling shaft (122) is arranged to adjust the position of the engagement sleeve (106) with respect to the coupling shaft (122), the attachment housing (120) being movable along the longitudinal axis (L1) with respect to the coupling shaft (122) by rotating the attachment housing (120) about the longitudinal axis (L1), wherein the first blocking member (104) is movable at an oblique angle with respect to the longitudinal axis (L1) and the first axis when moving between an unlatched and a locked position ,
The application relates to a coupling system for a medical dissecting tool, wherein the coupling system is configured to connect a power source with a dissecting tool.
In various surgical procedures, it is necessary to dissect the bone or other tissue. In some cases, it may be necessary to cut, grind, shape, or otherwise remove hardened materials to prepare them for implantation or to remove them from a patient. Many conventional surgical instruments used for this purpose employ pneumatic or electric motors to rotate a dissecting element. In its basic basic form, such a surgical instrument includes a motor part having a rotating shaft, a dissecting tool having a cutting and grinding member rotated by the rotating shaft of the motor, and a coupling arrangement for connecting the dissecting tool to a spindle or receiving the rotating shaft. The spindle or housing of the rotary shaft is usually housed in a base which is fixed to the engine.
Since it is often necessary to replace the dissecting tool, it is known in the art to use a quick release coupling to secure the dissecting tool to the surgical instrument. An example of such a quick release coupling is shown and described in the patent US 5505737 A entitled "Quick Release Coupling for a Dissecting Tool".
From patent US 6062575 A For example, methods and apparatus for surgical instruments are known for connecting a drive shaft to a suitable tool shaft. The device has a coupling by means of which the tool shaft can be releasably connected to the drive shaft. For transmitting rotational forces, axial stresses and pressure between the shafts, the coupling has different surface pairs.
While presently known surgical tools including interchangeable dissecting tools offer advantages over previous models, it remains desirable to further develop the relevant prior art with respect to dissecting tool disposition assemblies. For example, a dissecting tool may be operated at high speeds during a surgical procedure, e.g. rotate at about 70,000 revolutions / minute and it can not be kept effective with already available coupling arrangements in all operating conditions.
It is the object of the invention to provide a coupling for surgical instruments, which allows a quick replacement of a tool and is able to effectively hold the tool even at high speeds.
The object is solved by the features in claim 1. Further developments are specified in the dependent claims.
In one embodiment, a medical dissecting tool coupling system comprises: an internal passageway configured to receive a portion of a medical dissecting tool and an opening that takes the form of an elongated slot into which at least a portion of the barrier member at least partially extends, at least partially therealong Longitudinal axis is movable by a first track in a locked position to prevent the medical dissecting tool moves along a longitudinal axis of the internal passage.
In another embodiment, a powered medical tool coupling includes: an internal passageway for receiving the powered medical tool and a coupling assembly partially disposed in the internal passageway and movable between a latching position and an unlocked position, the coupling assembly comprising: a locking member and an engaging sleeve for urging the locking member into a locking position through a first angular track.
Further applicability of the present invention will be apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
The present invention will be more clearly understood from the detailed description and the accompanying drawings, wherein:
1 FIG. 5 illustrates a surgical dissecting tool used in a human patient according to one embodiment of the present invention. FIG.
2A shows a partially exploded perspective view of a surgical dissecting tool according to an embodiment of the present invention.
2 B shows a partially assembled surgical dissecting tool 2A ,
2C shows a composite surgical dissecting tool 2A ,
3A shows a partially cross-sectional side view of a medical dissecting tool, showing a locked coupling assembly according to an embodiment of the present invention.
3B shows an enlarged part of the cross-sectional side view of the coupling arrangement according to 3A ,
3C shows a transverse cross-sectional view of the coupling arrangement after 3A cut along the line 3C-3C ,
4A is a partially cross-sectional side view of a medical dissecting tool, showing an unlocked coupling assembly according to an embodiment of the present invention.
4B FIG. 12 is an enlarged portion of the cross-sectional side view of the coupling arrangement according to FIG 4A ,
4C is a transverse cross-sectional view of the coupling arrangement according to 4A , cut along the line 4C-4C ,
5A to 5C show details of a coupling shaft according to an embodiment of the present invention.
The present invention provides an improved coupling system and method for assembling medical dissecting instruments.
To understand the principles of the invention, reference will now be made to the embodiments or examples shown in the drawings, and specific language will be used to describe the same. It should nevertheless be apparent that this is not intended to limit the scope of the invention. Any changes and further modifications in the described embodiments and any further application of the principles of the invention as described herein are considered to be ordinary to one of ordinary skill in the art to which the invention pertains.
In relation to now 1 For example, in one embodiment, a human patient A is undergoing neurological surgery. As is common practice, access to the brain or other neurological structures often requires difficult dissection of bone or other tissue B. By way of example, a dissecting tool assembly is provided 10 according to an embodiment of the present invention, which is equipped to dissect part of the bone and other tissue B of the patient A, adjacent to the surgical access side. It is understood that the dissecting tool assembly 10 will be described briefly, since various embodiments of dissecting tool arrangements in a patent application US 20030023256 A1 filed July 22, 2002, which is incorporated herein by reference in its entirety.
In relation to now 2A to 2C Fig. 2 are partial perspective views of an embodiment of the dissecting tool assembly 10 shown. The dissecting tool arrangement 10 includes a motor housing 12 , which is coupled to an air supply and a hose assembly 14 which supplies the motor with compressed air and vents the low pressure exhaust air away from the surgical site. The dissecting tool arrangement 10 further comprises an attachment housing 16 and a dissecting tool 18 , As in 2A shown comprises the distal part 51 of the motor housing 12 a tapered guidance area 53 and a double-D junction region. The double-D connection region includes a pair of opposed and generally parallel planar portions which interrupt the otherwise cylindrical body to define two opposing and substantially parallel cylindrical portions. These parts are by means of a connection point 55 in a fixed segment with a cylindrical part 54 and a flat part 52 and in a movable segment with a cylindrical part 58 and a flat part 56 separated.
Well in terms of 2 B includes the attachment housing 16 an internal cavity around in the distal part 51 of the motor housing 12 intervene. Next are the attachment housing 16 and the distal part 51 designed to provide the user with a tactile feedback, which indicates a positive engagement. In an initial position with a first cylindrical part 25 , which substantially to the motor housing 12 Adjacent is an essay marking mark 24 essentially aligned with an unlatched identification mark 22 on the motor housing 12 , In this position that can Sezierwerkzeug 18 in the attachment housing 16 and in a coupling arrangement (described later) in the motor housing 12 be recorded.
Well in terms of 2C is the dissecting tool 18 inserted in the attachment housing 16 and ready to go with the engine case 12 to be coupled (see 3A to 3C) , the attachment housing can 16 in the direction of the arrow 23 in relation to the motor housing 12 to be turned around. Such a rotation moves the attachment mark 24 in substantial accordance with a lock identification mark 15 on the motor housing 12 , As described below, such rotation also blocks the coupling assembly to prevent the dissecting tool 18 unintentionally removed from the attachment housing.
Coupling arrangements according to a illustrated preferred embodiment will now be described in detail, although the following description is not intended to prevent the application of the teachings of the invention to implementations in alternative forms. Specific references will be made to the coupling arrangement 102 shown in 3A to 3C , The coupling arrangement 102 includes a drive shaft 122 , designed to work with a motor 12 to be coupled, at least partially surrounded by means of an engaging bushing 106 , A movement of the engaging bush 106 in relation to the drive shaft 122 is described in a conventional manner by moving the external parts of the device with respect to 2A to 2C ,
How clearer in 5A to 5C shown, includes the drive shaft 122 an elongated borehole 308 with an open end 310 and an internal shoulder 114 ( 3B) , The groove or the elongated drill hole 308 is configured to be a proximal part of the tool shaft 138 through the open end 310 take up and in contiguous engagement with the internal shoulder 114 to stand. An opening 302 extends between the outer surface of the drive shaft 122 and the elongated hole 308 , The opening 302 includes a lower part 304 with a first circumference and an upper part 306 with a second circumference greater than the first circumference. In a preferred feature, the opening goes 302 between the first circumference and the second circumference into each other to form a substantially beveled protrusion. As will be described more clearly below, a retention component may be used 104 in the opening 302 extend, however, contact with the beveled projection prevents this completely in the elongated hole 308 enters. As in 5C shown points the opening 302 a length L2 on, which is along the longitudinal axis L1 extends, and a width W, which extends substantially transverse to the longitudinal axis. In a preferred feature, is L2 greater than W so that the opening 302 takes the form of an elongated slot. Although an elongate slot extending along the longitudinal axis is shown for purposes of illustration, it is intended that alternative configurations of the aperture 302 may be made to practice the present invention without departing from the teachings herein.
In relation to now 3A to 3C is there the coupling arrangement 102 shown in a locked position. The retention component 104 is extending through the opening 302 into the wave 122 and in a retaining recess 128 on the tool shaft 140 shown. The intervention bush 106 surrounds a part of the drive shaft 122 adjacent to the openings 302 , The engaging bush 106 includes an inner surface with a relief region 107 (relief area) with a first inner diameter and an engagement surface 106a with a second minimum internal diameter that is less than the first diameter. The position of the engagement bush 106 in relation to the drive shaft 122 is through the movement of the tower housing 120 and the power of the spring 124 controlled. In the locked position, shown in FIG 3A to 3C is the engagement surface 106a in contact with the restraint member 104 , In the illustrated preferred embodiment, the engagement surface is 106a formed angled, whereby a first force to the retaining member 104 directed inward transverse to the longitudinal axis and a second force along the longitudinal axis L1 to the inner shoulder 114 is forwarded. In this position forces the force of the spring 124 when applied by the engaging bushing 106 and the retaining member 104 , the coupling end 142 the tool shaft 140 against the inner shoulder 114 ,
4A to 4C show the coupling arrangement 102 arranged in an unlocked position. In the unlocked position is the engaging bushing 106 positioned along the longitudinal axis, leaving the discharge area 107 axially adjacent to the retaining member 104 is positioned. In this position, the retaining member 104 the groove or groove 308 leave (channel). Next can in this position the coupling end 142 the tool shaft 140 spaced from the inner shoulder 114 be a gap 115 to create.
Well in terms of 3A to 3B the operation of the illustrated embodiments will be further described. In one embodiment, a medical dissecting tool 138 within the elongated borehole 308 advanced, until its coupling end 112 a retention component 114 contacted, which is part of the wave 122 is.
In one example, the coupling end 112 include one or more planar surfaces to interface with the corresponding surfaces within the borehole 308 to match a rotational force to the tool shaft 140 forward.
Now in more detail with respect to the partially exploded, perspective view of the 3B and 3C , pushes when an attachment housing 120 in the direction of an arrow 134 in relation to a motor housing 136 is rotated, this one spring 110 along the longitudinal axis L1 and to the motor housing 136 , which causes the spring 110 is compressed. As a result, a gap 108 between the attachment housing 120 and the engaging bushing 106 generated. At this point, the spring relaxes 124 and their extension presses the engaging bushing 106 in a direction parallel to the longitudinal axis L1 and to the attachment housing 120 , As a contact surface 106a the engaging bush 106 is beveled, this forces the locking member 106 , which may be formed as a spherical ball, by an angular path by moving both parallel to and to the longitudinal axis L1 , As a result, the locking member 104 along the longitudinal axis L1 move it until it is adjacent to the recess 128 is arranged, at which point the locking member inwardly into the recess 128 emotional. Finally, the locking component 104 against a wave 122 pressed. At this point secure the engaging bushing 106 and the wave 122 together the locking component 106 in the recess 128 , causing a movement of the shaft 140 along the longitudinal axis L1 is prevented.
It is intended that the contact surface 106a may include a variety of shapes, such as a wedge shape, a partially spherical shape, as long as such a shape, the movement of the locking member 104 through an angled path adapts.
In this illustration, the locking member 104 along an angular path, which is about 45 ° to the longitudinal axis L1 is formed, shown moving in the locked position. However, a variety of angles, which may range between about 0 ° to 90 °, are also provided by the present invention.
In the illustrated embodiment, the recess 128 formed concave from a longitudinal cross-sectional view and does not actively participate in the transmission of any rotational forces to the shaft 140 , However, it is envisaged that the recess 128 Surface formations comprises, which are adapted to receive rotational forces, and thereby participate in the drive of the shaft 140 ,
Well in terms of 3C For example, in one embodiment, to provide triangular support, three barrier members, each of which may be a spherical ball, may be formed for the coupling assembly. It is contemplated that a lesser or greater number of locking members may also be used by the present invention. Further, the blocking members may include other shapes, such as partial spheres or irregular shapes.
Well in terms of 4A to 4C is a coupling arrangement in one embodiment 202 shown in an unlocked position. More specifically, with respect to the partially exploded perspective view of FIG 4B and 4C becomes the force when the attachment housing 120 in the direction of an arrow 204 in relation to the motor housing 136 is rotated, which previously on the spring 110 was exercised, solved what the spring 110 causes it to relax and move along the longitudinal axis L1 (towards the engaging bush 106 ) to move. In the meantime, moves when the attachment housing 120 is rotated, this towards the engagement bushing 106 before and closes the gap 108 the 3B , At this point, the engaging bushing becomes 106 brought along along the longitudinal axis L1 and to the spring 124 to move, which causes the spring 124 , is compressed.
When the engaging bush 106 continue towards the spring 124 moves, this no longer secures the locking member 104 in the recess 128 , As a result, the locking member moves 104 from the recess 128 out by means of an angular trajectory both parallel to the longitudinal axis L1 (and towards the direction of the spring 124 ) and away from the longitudinal axis L1 ,
Although only a few exemplary embodiments of this invention have been described as detailed above, it will be apparent to those skilled in the art that many modifications are possible in the exemplary embodiments without materially departing from the novel teachings and advantages of this invention. Also, features illustrated and described above may be combined with respect to some embodiments with features discussed above and discussed with respect to other embodiments. Accordingly, all such modifications are intended to be included within the scope of this invention.
A medical dissecting tool coupling system (18, 138), wherein the coupling system (102) is configured to connect a power source to a dissecting tool (18, 138), comprising: a coupling shaft (122) having a proximal portion for receiving power from the power source, a distal portion and a longitudinal axis (L1) passing through the proximal portion and the distal portion, the distal portion having an outer surface and an inner surface and wherein the inner surface defines an internal passage (308) extending along the longitudinal axis and adapted to receive a portion of the medical dissecting tool (18, 138), and at least one first opening (302) extending from the outer surface to the inner passage (308) along a first axis that is perpendicular to the longitudinal axis (L1), the first opening (302) having a first length (L2 ) extending along the longitudinal axis (L1) between a proximal and a distal boundary, and wherein the first opening (302) has a first width (W) transverse to the longitudinal axis (L1) and the first axis Further, the first length (L2) is greater than the first width (W) such that the first opening (302) takes the form of an elongate slot along the longitudinal axis (L1), and wherein the proximal boundary , the distal boundary and the two lateral boundaries extend in a direction that extends parallel to the first axis, at least one locking member (104) extending at least partially into the first opening (302) and movable with respect to the coupling shaft (122) from an unlocked to a locked position by a first track in a direction at least partially parallel to the longitudinal axis (L1) is to prevent the medical dissecting tool (18, 138) from moving along the longitudinal axis (L1) of the internal passage (308) the at least one locking member (104) is disposed in an unlocked position spaced from the proximal boundary and adjacent the distal boundary of the first opening (302), and wherein the at least one locking member (104) is in a locked position adjacent to the proximal boundary and spaced apart from the distal boundary of the first opening (302), wherein an engagement sleeve (106) disposed adjacent to the distal portion, the engagement sleeve (106) having an inner contact surface (106a) for engagement with the at least one locking member (104) which is at an oblique angle extends on the longitudinal axis (L1), wherein the engagement sleeve (106) is urged toward the proximal portion of the coupling shaft (122) by a spring (124), and wherein an attachment housing (120) is provided which is disposed about the proximal portion of the coupling shaft (122) to adjust the position of the engagement sleeve (106) with respect to the coupling shaft (122), the attachment housing (120) being movable along the longitudinal axis (L1 ) is movable with respect to the coupling shaft (122) by rotating the attachment housing (120) about the longitudinal axis (L1), wherein the first blocking member (104) is movable at an oblique angle with respect to the longitudinal axis (L1) and the first axis when moving between an unlatched and a locked position.
Coupling system after Claim 1 wherein the first web extends at an angle of about 45 ° to the longitudinal axis (L1).
Coupling system after Claim 1 wherein the at least one blocking member (104) comprises a spherical ball.
Coupling system according to one of Claims 1 to 3 wherein a second opening is provided which extends from the outer surface to the inner passage (308) along a second axis which is perpendicular to the longitudinal axis (L1), the second opening having a second length extending along the second axis A longitudinal axis (L1) extends, and wherein the second opening has a second width which extends transversely to the longitudinal axis (L1) and the second axis, wherein the second length is greater than the second width such that the second opening of the shape an elongated slot along the longitudinal axis (L1).
Coupling system after Claim 4 wherein a second blocking member is provided which extends at least partially into the second opening and is movable from an unlocked to a locked position with respect to the coupling shaft (122) in a direction at least partially parallel to the longitudinal axis (L1) to prevent the medical dissecting tool (18, 138) from moving along the longitudinal axis (L1) of the internal passage (308).
Coupling system after Claim 5 wherein the second locking member is movable at an oblique angle with respect to the longitudinal axis (L1) and the first axis when moving between an unlocked and a locked position.
Coupling system after Claim 4 wherein a part of the inner contact surface (106a) is adapted for engagement with the second locking member.
Coupling system after Claim 4 wherein there is provided a third opening extending from the outer surface to the inner passage (308) along a third axis which is perpendicular to the longitudinal axis (L1), the third opening having a third length extending along the third axis A longitudinal axis (L1) extends, and wherein the third opening has a third width which extends transversely to the longitudinal axis (L1) and the third axis, wherein the third length is greater than the third width such that the third opening of the shape an elongated slot along the longitudinal axis (L1).
Coupling system after Claim 8 wherein a third blocking member is provided which extends at least partially into the third opening and is movable from an unlatched to a locked position with respect to the coupling shaft (122) in a direction at least partially parallel to the longitudinal axis (L1) to prevent the medical dissecting tool (18, 138) from moving along the longitudinal axis (L1) of the internal passage (308).
Coupling system after Claim 9 wherein the second and third locking members each comprise a spherical ball.
DE102004051794.0A 2003-10-31 2004-10-25 Coupling system for a medical dissecting tool Active DE102004051794B4 (en)
US10/698,638 US7641655B2 (en) 2003-10-31 2003-10-31 Coupling system for surgical instrument
US10/698638 2003-10-31
DE102004051794A1 DE102004051794A1 (en) 2005-07-28
DE102004051794B4 true DE102004051794B4 (en) 2019-07-04
ID=34435499
DE102004051794.0A Active DE102004051794B4 (en) 2003-10-31 2004-10-25 Coupling system for a medical dissecting tool
US (1) US7641655B2 (en)
DE (1) DE102004051794B4 (en)
FR (1) FR2861574B1 (en)
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2004-10-25 DE DE102004051794.0A patent/DE102004051794B4/en active Active
2004-10-28 FR FR0411539A patent/FR2861574B1/en active Active
US7641655B2 (en) 2010-01-05
FR2861574A1 (en) 2005-05-06
US20050096662A1 (en) 2005-05-05
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Representative=s name: DENNEMEYER & ASSOCIATES S.A., 80336 MUENCHEN, DE
2016-02-05 R016 Response to examination communication