Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
  • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
  • B25B23/02—Arrangements for handling screws or nuts
  • B25B23/08—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
  • B25B23/10—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means
  • B25B23/105—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means the gripping device being an integral part of the driving bit
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods
  • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
  • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
  • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
  • A61B17/8875—Screwdrivers, spanners or wrenches
  • A61B17/8886—Screwdrivers, spanners or wrenches holding the screw head
  • A61B17/8888—Screwdrivers, spanners or wrenches holding the screw head at its central region
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
  • B25B15/00—Screwdrivers
  • B25B15/001—Screwdrivers characterised by material or shape of the tool bit
  • B25B15/004—Screwdrivers characterised by material or shape of the tool bit characterised by cross-section
  • B25B15/008—Allen-type keys
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
  • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
  • B25B23/02—Arrangements for handling screws or nuts
  • B25B23/08—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation
  • B25B23/10—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means
  • B25B23/105—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means the gripping device being an integral part of the driving bit
  • B25B23/108—Arrangements for handling screws or nuts for holding or positioning screw or nut prior to or during its rotation using mechanical gripping means the gripping device being an integral part of the driving bit the driving bit being a Philips type bit, an Allen type bit or a socket

Definitions

• the invention relates to a screwdriver for an internal profile screw with a shank and a profiled outer profile head corresponding to the internal profile recess of the internal profile screw, in particular for use in connection with the surgical introduction of an implant into the body of a human.
• the invention has for its object to provide a screwdriver which is simple in construction and producible, in particular a screwdriver which applies a reproducible clamping force independent of tolerances of the internal profile recess of the screw.
• a screwdriver for an internal scoring screw, which screwdriver has a shank and an inner profile recess of the internal profile screw correspondingly formed outer profile head, wherein the distal portion of the shaft is split with the outer profile head and a shaft receiving, is provided relative to this movable sleeve, wherein at least one of the parts resulting from the cleavage of the shaft is provided with a run-on slope and the sleeve is provided with a run-on on the run-up (n) start-up ring, wherein upon movement of the sleeve relative to Shank of the beveled part of the shaft is sheared away from the other part causing the inner profile recess to buckle with the outer profile head of the shaft.
• a screwdriver for an inner profile screw which screwdriver has a shank and a mecanicprofilausnaturalung the mecanicprofilschraube complementarily designed according to the outer profile head, the screwdriver is provided a consisting of an elastic material shaft receiving, screwing with this sleeve, the distal portion of the shaft is formed split with the outer profile head, at least one of the parts resulting from the cleavage of the shaft is provided with a run-on slope and the sleeve is provided with a run-on on the run-in (n) stop ring, wherein upon rotation of the sleeve relative to the shank of the chamfered portion of the shank, causing the inner profile recess to deflect with the shank Outer profile head of the shaft is sheared away from the other part.
• the screwdriver can be set up in such a way that, when the sleeve is rotated relative to the shaft, the part of the shaft provided with the run-on slope is sheared away from the other part, causing the inner profile recess to become jammed with the outer profile head of the shaft.
• a screwdriver for a Irmenroidkantschrau.be is created, which screwdriver has a shaft and the mecanicalkantausEnglishung the Irmermiehrkantschrau.be complementarily designed according trained outer polygonal head, wherein a shaft receiving, is provided with the screw sleeve, the distal region of the Shaft with the outer polygonal head is split in a plane of symmetry, the two split halves of the shaft are provided with oppositely arranged run-on slopes and the sleeve is provided with a force acting on the run-up ramp ring.
• the screwdriver can be configured such that when the sleeve is rotated relative to the shaft, the part of the shaft provided with the run-on slope is sheared away from the other part, causing jamming of the inner profile recess with the outer profile head of the shaft.
• a screwdriver for an internal profile screw which screwdriver has a shank and a profiled profile of the réellepro colschraiibe complementarily designed according to the outer profile head, wherein the distal portion of the existing of an elastic material shaft is split with the outer profile head is formed and an outer surface of the Part of the outer profile head is formed thickened and the part when inserted into the mecanicalfilausnaturalung the screw elastically approaches the other part under narrowing of the gap and clamped elastically with the mecanicprofilausnaturalung.
• the one part may be provided with a run-on slope and a sleeve provided with a corresponding run-on slope, wherein a rotation of the sleeve in the one Direction of introduction of the outer profile head in the Imienprofilausnelimung permitting aligning the two parts of the shaft causes each other and causes a rotation of the sleeve in the opposite direction jamming of the outer profile head in the mecanicprofilausnaturalung.
• the split distal region of the shaft can be designed to be exchangeable.
• the plane in which the gap passes may be a plane of symmetry, but preferably the cleavage plane is off-center, i.e., in the plane of the gap. the shaft is split asymmetrically.
• the profile can be a polygonal profile, but also a Torx or Torx Plus profile (hexalobular).
• Fig. 2 is a deferred in use on the shaft sleeve
• Fig. 3 is a Fig. 1 corresponding representation rotated by 90 °.
• the screwdriver serving to hold and rotate an internal profile screw 10 consists of a shaft 12 and an external profile head 16 which forms the distal end of the shaft 12 and which corresponds to the internal profile recess 14 of the internal profile screw 10 in a complementary manner.
• the inner profile recess may be formed as ImienellokantausANSung, which corresponds to a polygonal socket complementary.
• the distal portion is formed split with the outer profile head 16, the sleeve 18 shown in Fig. 2 is placed, the outer profile head 16 remains free.
• the sleeve 18 may be formed as a sleeve 18 screwing to the shaft 12.
• the two split parts of the shaft 12 are provided with a run-on slope 20 and the sleeve 18 is provided with a force acting on the run-on slope 20 run-up ring 22.
• the abutment ring 22 rides on the run-on slope 20, the split portions of the shank 12 are sheared away from each other, causing jamming of the female profile recess 14 of the head 10 of a screw.
• the distal region of the shaft with the outer polygonal head 16 can be designed to be split in a plane of symmetry lying parallel to two plane surfaces of the polygon.
• the distal region of the shaft is asymmetrically, ie off-center, split as shown in the drawing.
• such asymmetric splitting may result in one of the two parts of the shank being smaller than the other part of the shank, ie the two parts have a different cross-sectional area.
• the smaller of the two parts may have a cross-sectional area that is one-third to one-eighth the cross-sectional area of the larger of the two parts.
• Such an asymmetric pitch may have the advantage that under load, ie when applying a torque to the two parts of the shaft when using the screwdriver, a fracture of the shaft is prevented or at least delayed, ie only occurs at a larger torque applied a break.
• the two split halves of the shaft 12 can be provided with run-on slopes arranged opposite one another and the sleeve 18 with a run-on ring 22 acting on the run-on slopes 20.
• the split halves of the shaft 12 are sheared away causing jamming of the inner sleeve annular recess 10 of the polygonal head 14 (profile head) 14.
• the split halves of the outer polygon head return to their original position due to the elasticity of the material.
• the distal portion of the shaft 12 is formed with the outer polygonal head 16 split in a corresponding manner in a plane of symmetry.
• One half of the gap is deviated to the other half of the gap by a few angular degrees (in the absence of load).
• the two halves align with insertion of the split outer polygon head into the internal polygonal recess of the screw 10 and jam with this due to the elasticity of the material of the outer polygonal head.
• one of the two split parts of the shaft 12 is provided with a run-on slope 20, and the sleeve 18 is provided with a run-on ring 22 acting on the run-on slope 20.
• the split parts of the shaft 12 are sheared away causing jamming of the inner prof ⁇ laus originallyung 10 of the profile head 14.
• the split parts of the outer profile head return to the starting position due to the elasticity of the material.
• the distal portion of the shaft 12 is split with the outer profile head 16.
• One part of the gap is deviated to the other part of the gap by a few angular degrees (in the absence of load).
• the two halves align themselves with the insertion of the split outer profile head into the inner profile. filausappelung the screw 10 and jammed with this due to the elasticity of the material of the outer profile head.
• a sleeve may be provided, upon rotation of which the parts align with each other and thus enable insertion of the outer polygonal head into the polygonal recess. In a reverse rotation of the sleeve, the parts again want to take the strigerte starting position, they jamming doing with the êtprofilaus supraung.
• an outwardly facing side of the one part of the outer polygonal head is thickened, which one part approaches the other part upon insertion into the polygonal socket while reducing the gap width and exerts on the corresponding flank of the mecanical supratoneum.
• the sleeve can be acted upon - preferably by a torque limiter - with a defined force, so that the application of a defined clamping force is ensured regardless of any tolerances.
• the shaft may not only be simply split, but the splitting or splitting may be performed so that a portion of the distal end of the shaft is removed, i. a notch or a recess is formed in the cross-sectional area of the shank. In other words, then forms the cross-sectional area of the two parts of the shaft no longer completely the inner profile of the screw, but it results in an overall cross-section, which is smaller than the cross-sectional area of the réelleproglas the inner profile screw. Such a recess may increase the resistance to breakage of the shaft of the screwdriver when using the screwdriver.

Landscapes

• Health & Medical Sciences (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Orthopedic Medicine & Surgery (AREA)
• Surgery (AREA)
• Life Sciences & Earth Sciences (AREA)
• Medical Informatics (AREA)
• Heart & Thoracic Surgery (AREA)
• Biomedical Technology (AREA)
• Molecular Biology (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
• Surgical Instruments (AREA)
• Mutual Connection Of Rods And Tubes (AREA)

Applications Claiming Priority (3)

Publications (1)

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Family Applications (1)

Country Status (7)

Families Citing this family (18)

Family Cites Families (19)

• 2005
  • 2005-12-16 DE DE202005019646U patent/DE202005019646U1/de not_active Expired - Lifetime
• 2006
  • 2006-07-08 US US11/988,512 patent/US8347768B2/en active Active
  • 2006-07-08 AU AU2006269089A patent/AU2006269089B2/en active Active
  • 2006-07-08 JP JP2008520709A patent/JP5657202B2/ja not_active Expired - Fee Related
  • 2006-07-08 EP EP06775687A patent/EP1910034A2/de not_active Ceased
  • 2006-07-08 WO PCT/DE2006/001185 patent/WO2007006282A2/de not_active Ceased
  • 2006-07-08 CA CA2614779A patent/CA2614779C/en not_active Expired - Fee Related
• 2013
  • 2013-01-07 US US13/735,439 patent/US8770068B2/en active Active

Non-Patent Citations (1)

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