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1. (WO1990008510) SCREW AND DRIVER
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1990/008510 International Application No.: PCT/US1990/000651
Publication Date: 09.08.1990 International Filing Date: 02.02.1990
IPC:
A61B 17/86 (2006.01) ,A61B 17/88 (2006.01) ,B25B 23/10 (2006.01)
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
17
Surgical instruments, devices or methods, e.g. tourniquets
56
Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
58
for osteosynthesis, e.g. bone plates, screws or the like
68
Internal fixation devices
84
Fasteners therefor
86
Pins or screws
A HUMAN NECESSITIES
61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
B
DIAGNOSIS; SURGERY; IDENTIFICATION
17
Surgical instruments, devices or methods, e.g. tourniquets
56
Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
58
for osteosynthesis, e.g. bone plates, screws or the like
88
Methods or means for implanting or extracting internal fixation devices
B PERFORMING OPERATIONS; TRANSPORTING
25
HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; HANDLES FOR HAND IMPLEMENTS; WORKSHOP EQUIPMENT; MANIPULATORS
B
TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING
23
Details of, or accessories for, spanners, wrenches, screwdrivers
02
Arrangements for handling screws or nuts
08
for holding or positioning screw or nut prior to or during its rotation
10
using mechanical gripping means
Applicants:
ACUFEX MICROSURGICAL, INC. [US/US]; 575 University Avenue Norwood, MA 02062, US
Inventors:
SMALL, Alan, A.; US
BOURQUE, Bernard, J.; US
Agent:
PANDISCIO, Mark, J.; Schiller, Pandiscio & Kusmer 125 CambridgePark Drive Cambridge, MA 02140, US
Priority Data:
307,34306.02.1989US
Title (EN) SCREW AND DRIVER
(FR) VIS ET TOURNEVIS
Abstract:
(EN) A screw (20) and driver (50) combination designed so that the screw (20) is releasably axially couplable with the driver (50) and so that the screw (20) is positively rotatably engageable with the driver (50). The screw (20) comprises an axial bore (26) of circular cross section and a counterbore (28) of polygonal cross section. The driver (50) comprises a radially-compressible front portion (66) sized to engage the axial bore (26) of the screw with a minor spring interference fit and an intermediate portion (56) sized to positively rotatably engage the counterbore (28) of the screw (20). The screw (120) and driver (150) may be adapted for use with a guide wire insertion system by providing axial bores (125, 185) extending through the entire lengths of the screw (20) and driver (50). The driver (250) may include a mechanical expansion assembly (297) for causing said front portion to expand radially.
(FR) On a mis au point une combinaison de vis (20) et de tournevis (50) conçue pour pouvoir accoupler axialement et de maière libérable ladite vis (20) audit tournevis (50), de sorte que ce dernier (50) puisse s'engager de manière rotative et directe dans ladite vis (20). Ladite vis (20) comprend un alésage axial (26) de section transversale circulaire ainsi qu'un contre-alésage (28) de section transversale polygonale. Ledit tournevis (50) comprend une partie frontale (66) compressible radialement, dimensionnéee pour s'engager dans l'alésage axial (26) de ladite vis avec une adaptation d'interférence de ressort réduite, ainsi qu'une partie intermédiaire (56) dimensionnée pour s'engager rotativement directement dans le contre-alésage (28) de ladite vis (20). On peut adapter la vis (120) et le tournevis (150) pour une utilisation avec un système d'insertion de fil de guidage, en ménageant des alésages axiaux (125, 185) s'étendant sur toutes les longueurs de la vis (20 ) et du tournevis (50). Ledit tournevis (250) peut comprendre un ensemble (297) de dilatation mécanique provoquant la dilatation radiale de ladite partie frontale.
Designated States: AU, CA, FI, JP
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
FI904905EP0411109AU1990051667