WO1994012111B1 - Nut starter wrench for orthopedic fixation system - Google Patents

Nut starter wrench for orthopedic fixation system

Info

Publication number
WO1994012111B1
WO1994012111B1 PCT/US1993/011388 US9311388W WO9412111B1 WO 1994012111 B1 WO1994012111 B1 WO 1994012111B1 US 9311388 W US9311388 W US 9311388W WO 9412111 B1 WO9412111 B1 WO 9412111B1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
nut
bolt
sleeve
tool assembly
Prior art date
Application number
PCT/US1993/011388
Other languages
French (fr)
Other versions
WO1994012111A1 (en
Filing date
Publication date
Priority claimed from US07/980,554 external-priority patent/US5352231A/en
Priority to KR1019960702781A priority Critical patent/KR100416866B1/en
Application filed filed Critical
Priority to AU56174/94A priority patent/AU5617494A/en
Publication of WO1994012111A1 publication Critical patent/WO1994012111A1/en
Publication of WO1994012111B1 publication Critical patent/WO1994012111B1/en

Links

Abstract

A tool assembly has a shaft (11) with a sleeve (21) slidable along it and hexagonal drive post (14) at its lower end to be received in a hex socket at the upper end (34) of a bone bolt secured in a patient's spine. A nut (33) to secure a connector (37) on the bolt, is temporarily stored on a short thread (16) on the shaft near the lower end. The sleeve (21) is slid down the shaft and a hex socket (23), its lower end is received on the nut. The sleeve is manually turned while a handle on a drive post prevents the shaft, and thereby the bolt, from turning. As the sleeve turns, the nut is turned off the short thread and down onto the bolt thread (34).

Claims

AMENDED CLAIMS[received by the International Bureau on 27 May 1994 (27.05.94); original claims 1, 3, 5, 6, 8, 10-12 and 18 amended; new claim 19 added; remaining claims unchanged (4 pages)]
1. A nut starting tool assembly for driving a nut onto a threaded end of a bone bolt when the bolt is secured in animal bone, comprising: a shaft having a first end configured for fitting reception on a tool receiving end of a bone bolt, and having an opposite second end configured for rotating said shaft, said shaft further having storage means at an intermediate portion thereof for reception and temporary storage thereon of a nut to be installed on the threaded end of the bone bolt; and a sleeve coaxially disposed on said shaft and having a first end configured for fitting reception on the nut when temporarily stored on the intermediate portion of the shaft, and an opposite second end configured to be manipulated independent of said shaft to move the nut off said storage means and drive the nut onto the threaded end of the bone bolt when the nut is received within said first end.
2. The tool assembly of claim 1 and further comprising: a knurled surface on the sleeve adjacent the second end to facilitate rotary manipulation of the sleeve.
3. The tool assembly of claim 1 and further comprising: a tool receiving external surface at said second end of said sleeve and configured for reception thereon of a driving portion of a rotation tool.
4. The tool assembly of claim 3 and further comprising: -14-
a socket at the second end of the sleeve and configur for reception therein of a driving post of a torque applyin tool.
5. The tool assembly of claim 3 and wherein: the configuration of said first end of said shaft is 3.5mm hexagonal drive post; the configuration of said second end of said shaft is 1/4 inch square drive post; and the con iguration of said first end of said sleeve is 3/8 inch hexagonal socket.
6. The tool assembly of claim 5 and wherein: the configuration of said external surface at said second end of said sleeve is a hexagonal post.
7. The tool assembly of claim 6 and further comprising: a 1/4 inch square socket at the second end of the sleeve.
8. The tool assembly of claim 7 and wherein: the overall length of said shaft is about 10 inches; the overall length of said sleeve is about 5 inches; said storage means at said includes said intermediate portion being threaded at about 2 inches from said first en for threaded reception of the nut thereon.
9. The tool assembly of claim 8 and wherein: there are about three thread turns at the intermediat portion. -15-
10. Tlie tool assembly of claim 3 and wherein: said sleeve is guidedly received on said shaft so that the first end of said sleeve is centered on a common axis with the first end of said shaft.
11. Λ method of installing a nut on a bolt situated i animal soft tissue and secured in animal bone, the method comprising the steps of: installing a nut drive sleeve in a bo]t holder shaft; installing a nut on the shaft intermediate between the ends of the shaft; advancing the bolt holder shaft with sleeve thereon through the adjacent tissue and engaging the bolt holder on the bolt; engaging the nut with the sleeve; disengaging the nut from the shaft; and driving the nut along the shaft with the sleeve while guiding the sleeve on the shaft and thereby guiding the nut onto the bolt.
12. The method of claim 11 and further comprising the step of: holding the shaft with its axis colinear with the bolt axis while holding the bolt witii the shaft to control rotational movement of the bolt while the nut is guided onto the bolt.
13. The method of claim 11 and wherein the step of installing the nut on the shaft comprises: screwing the nut onto a short thread on tlie shaft such -16-
that the nut will not leave the thread as a result of axial force on the nut relative to the shaft, but only upon application of rotational force on the nut relative to the shaf .
14. The method of claim 11 and wherein the step of engaging the nut with the sleeve comprises: capturing the nut in a mating drive socket in the sleeve.
15. The method of claim 12 and further comprising the step of: tightening the nut on the bolt with a torque wrench coupled to a tool receiving external surface on the sleeve.
16. The method of claim 15 and further comprising the step of: removing the shaft with sleeve thereon from the bolt and adjacent tissue.
17. The method of claim 11 and turning the bolt to tighten the bolt in the bone.
18. The method of claim 17 and further comprising the step of: holding the shaft with its axis colinear with the bolt axis while holding the bolt with the shaft to control rotational movement of the bolt while the nut is guided onto the bolt.
19. The tool assembly of claim 1 and wherein: said sleeve has an overall length less than the overal length of said shaft.
PCT/US1993/011388 1992-11-23 1993-11-23 Nut starter wrench for orthopedic fixation system WO1994012111A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1019960702781A KR100416866B1 (en) 1992-11-23 1993-11-22 Receiver device and signal processing method
AU56174/94A AU5617494A (en) 1992-11-23 1993-11-23 Nut starter wrench for orthopedic fixation system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/980,554 1992-11-23
US07/980,554 US5352231A (en) 1992-11-23 1992-11-23 Nut starter wrench for orthopedic fixation system

Publications (2)

Publication Number Publication Date
WO1994012111A1 WO1994012111A1 (en) 1994-06-09
WO1994012111B1 true WO1994012111B1 (en) 1994-08-04

Family

ID=25527655

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/011388 WO1994012111A1 (en) 1992-11-23 1993-11-23 Nut starter wrench for orthopedic fixation system

Country Status (4)

Country Link
US (1) US5352231A (en)
KR (1) KR100416866B1 (en)
AU (1) AU5617494A (en)
WO (1) WO1994012111A1 (en)

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