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This is a record of a document published elsewhere, first published by the United States Patent and Trademark Office, as US-5139499-A, on 18 August 1992. OpenTechnical did not first disclose it. The identifier, hashes and timestamps below record what this library served and when, not when the material became public. View the original.

OT-2026-000003396

Screw and driver

Published
Permanent URL
Classification
Tools & Tooling › Clamping Tools
Inventors
BOURQUE BERNARD J, SMALL ALAN A
Assignee
AMERICAN CYANAMID CO
Original source
US-5139499-A, the United States Patent and Trademark Office, 18 August 1992
Document SHA-256
bf3b980e3f3601a180b20e49399bd3cee5e50bef4a262bdaa1809b756edc4cde

A screw and driver combination designed so that the screw is releasably axially couplable with the driver and so that the screw is positively rotatably engageable with the driver. The screw comprises an axial bore of circular cross section and a counterbore of polygonal cross section. The driver comprises a radially-compressible front portion sized to engage the axial bore of the screw with a minor spring interference fit and an intermediate portion sized to positively rotatably engage the counterbore of the screw. The screw and driver may be adapted for use with a guide wire insertion system by providing axial bores extending through the entire lengths of the screw and driver. The driver may include a mechanical expansion assembly for causing said said front portion to expand radially.

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Abstract

A screw and driver combination designed so that the screw is releasably axially couplable with the driver and so that the screw is positively rotatably engageable with the driver. The screw comprises an axial bore of circular cross section and a counterbore of polygonal cross section. The driver comprises a radially-compressible front portion sized to engage the axial bore of the screw with a minor spring interference fit and an intermediate portion sized to positively rotatably engage the counterbore of the screw. The screw and driver may be adapted for use with a guide wire insertion system by providing axial bores extending through the entire lengths of the screw and driver. The driver may include a mechanical expansion assembly for causing said said front portion to expand radially.

1. Drawings

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Publication information

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Citation

OpenTechnical Publication OT-2026-000003396, “Screw and driver,” published September 15, 2026 at 20:21:31 UTC, https://opentechnical.org/p/OT-2026-000003396.

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Terms

This record reproduces a document published elsewhere and is provided for reference and study. Rights in the original remain with its owner. See the publication policy.