Surgical drill instrument with motor and locking mechanism to receive an attachment and a cutting burr
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61B-017/16
A61B-017/32
A61B-017/00
출원번호
US-0626407
(2017-06-19)
등록번호
US-10194921
(2019-02-05)
발명자
/ 주소
del Rio, Eddy H.
Enck, Duane Jeffrey
출원인 / 주소
DePuy Synthes Products, Inc.
대리인 / 주소
Meunier Carlin & Curfman LLC
인용정보
피인용 횟수 :
0인용 특허 :
71
초록▼
A surgical apparatus having a locking mechanism that receives a cutting burr and that may include a loading and running position. The locking mechanism may include a motor driven spindle that carries a locking pawl and a detent pawl that lock the cutting burr in place an prevent the cutting burr fro
A surgical apparatus having a locking mechanism that receives a cutting burr and that may include a loading and running position. The locking mechanism may include a motor driven spindle that carries a locking pawl and a detent pawl that lock the cutting burr in place an prevent the cutting burr from inadvertently falling out of the surgical drill instrument when in its load position. A diamond-shaped portion of the cutting burr may be formed in a six-sided diamond configuration and a perpendicular back end surface. The end of the cutting burr may include another diamond-shaped portion formed in a six-sided diamond shape surface that mates with a complementary surface formed in the receiving end of the spindle of the motor/locking mechanism. In an aspect, the attachment of the cutting burr is such that the cutting burr has substantially zero axial movement and runs true in the running condition.
대표청구항▼
1. A surgical drill, comprising: a cutting burr;a rotatable spindle for driving the cutting burr;a locking mechanism coupling the cutting burr to the spindle such that rotational movement of the spindle is translated to the cutting burr, the locking mechanism comprising a plurality of concentrically
1. A surgical drill, comprising: a cutting burr;a rotatable spindle for driving the cutting burr;a locking mechanism coupling the cutting burr to the spindle such that rotational movement of the spindle is translated to the cutting burr, the locking mechanism comprising a plurality of concentrically disposed sleeves concentric to the spindle, the plurality of sleeves including an outer sleeve, and an intermediate sleeve located between the outer sleeve and the spindle, where the outer sleeve includes a tab extending axially from a distal end of the outer sleeve;an attachment member coupled to the locking mechanism such that the locking mechanism is received within a central body of the attachment member, where rotational movement applied to the attachment member results in a corresponding rotational movement of a portion of the locking mechanism; anda motor for driving rotational movement of the spindle,wherein the intermediate sleeve extends through the outer sleeve and includes an engagement feature at a distal end of the intermediate sleeve for engaging a portion of the attachment member. 2. The surgical drill of claim 1, further comprising an inner sleeve concentrically disposed between the spindle and the intermediate sleeve, the inner sleeve fixedly coupling the cutting burr to the locking mechanism. 3. The surgical drill of claim 1, wherein the attachment member includes an outer case defining a cylindrical portion and a transitional tapering portion for providing a line-of-sight for an operator of the surgical drill along the attachment member toward a distal end of the cutting burr, wherein, the cylindrical portion of the outer case defines the central cavity receiving the locking mechanism. 4. The surgical drill of claim 1, wherein the attachment member includes an annular-shaped disk mounted within the central cavity of the attachment member, wherein the disk is positioned adjacent a distal end of the locking mechanism within the central cavity. 5. The surgical drill of claim 4, wherein the disk includes an increased diameter cylindrical portion and a reduced diameter cylindrical portion, wherein the increased diameter cylindrical portion is positioned toward a proximal end of the surgical drill and the reduced diameter cylindrical portion is positioned toward a distal end of the surgical drill,wherein the increased diameter cylindrical portion is adjacent a cylindrical portion of an outer case of the attachment member and the reduced diameter cylindrical portion is adjacent a transitional tapering portion of the outer case, the transition tapering portion providing a line-of-sight for an operator of the surgical drill along the attachment member toward a distal end of the cutting burr. 6. The surgical drill of claim 4, wherein the disk includes a slot extending from a proximal end of the disk toward a distal end of the disk, wherein the tab extending from the distal end of the outer sleeve is received within the slot to releasably couple the outer sleeve and the disk to fix a rotational position of the outer sleeve with respect to the disk,wherein a distal end surface of the outer sleeve abuts a correspondingly shaped proximal end surface of the disk. 7. The surgical drill of claim 6, wherein disk includes a cutout extending from a distal end of the disk toward a proximal end of the disk, wherein the engagement feature provided on the intermediate sleeve extends radially at the distal end of the intermediate sleeve, the engagement feature sized and configured to releasably engage the cutout provided on the disk. 8. The surgical drill of claim 7, wherein the engagement feature includes a cog wheel and corresponding cog gear member extending radially from the cog wheel. 9. The surgical drill of claim 7, wherein the locking mechanism is movable between a loading position where the cutting burr can be removed from the locking mechanism and a running position where the cutting burr is retained within the locking mechanism, wherein in the loading position the engagement feature of the intermediate sleeve extends through and beyond the distal end of the disk. 10. The surgical drill of claim 9, wherein in the loading position the engagement feature extends through and beyond the cutout. 11. The surgical drill of claim 9, wherein transitioning the surgical drill from the loading position to the running position includes positioning the tab extending from the distal end of the outer sleeve into engagement with the slot in the disk, and positioning the engagement feature of the intermediate sleeve into engagement with the cutout of the disk, such that the outer sleeve rotates with respect to the intermediate sleeve in response to rotational movement applied to the attachment member to engage and retain the cutting burr within the locking mechanism such that rotational movement of the spindle is translated to the cutting burr. 12. The surgical drill of claim 11, wherein rotational movement applied to the attachment member results in an equivalent rotational movement of the outer sleeve. 13. The surgical drill of claim 4, wherein the locking mechanism extends through the disk such that the distal end of the locking mechanism extends beyond a distal end of the disk within the housing. 14. The surgical drill of claim 4, further including an o-ring mounted on an inner surface of the disk. 15. The surgical drill of claim 1, wherein the attachment member includes a central bore to allow the cutting burr to pass therethrough. 16. The surgical drill of claim 1, wherein the locking mechanism is coupled to the motor via external threads provided on the locking mechanism sized and configured to mate with a corresponding threaded portion provided on a motor housing. 17. A method of loading a cutting burr in a surgical drill, the surgical drill comprising a motor, a locking mechanism and a detachable attachment member, a cutting burr, and a rotatable spindle for driving the cutting burr, the locking mechanism movable between a loading position and a running position, the method comprising: coupling the attachment member to the locking mechanism such that the locking mechanism is in the loading position;inserting the cutting burr into the surgical drill through an end of the attachment member and into the locking mechanism; andplacing the surgical drill in the running position by moving the attachment member to cause the locking member to engage and retain the cutting burr and translate rotational movement of the spindle to the cutting burr,wherein the locking mechanism is received within a central cavity of the attachment member, the locking mechanism including a plurality of concentrically disposed sleeves concentric to the spindle, the plurality of sleeves including an outer sleeve and an intermediate sleeve located between the outer sleeve and the spindle,wherein the intermediate sleeve extends through the outer sleeve and the intermediate sleeve includes an engagement feature at a distal end of the intermediate sleeve for engaging an annular disk provided between the locking mechanism and a distal end of the central cavity,wherein in the loading position the engagement feature of the intermediate sleeve extends beyond the annular disk such that the engagement feature rotates freely of the attachment member and the annular disk. 18. The method of claim 17, wherein transitioning the surgical drill from the loading position to the running position includes positioning a tab extending from a distal end of the outer sleeve into engagement with a slot provided in the disk, and positioning the engagement feature of the intermediate sleeve into engagement with a cutout provided in the disk, such that the outer sleeve rotates with respect to the intermediate sleeve in response to rotational movement applied to the attachment member to engage and retain the cutting burr within the locking mechanism such that rotational movement of the spindle is translated to the cutting burr.
Walen,James G., Surgical handpiece with a push rod that both transfers rotational movement to an output drive shaft and that actuates a cutting accessory locking assembly.
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