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1. (WO1997006930) DEVICE FOR HOLDING SMALL SCREWS USING AN ELASTICALLY CLAMPING RING

Pub. No.:    WO/1997/006930    International Application No.:    PCT/CH1996/000281
Publication Date: Feb 27, 1997 International Filing Date: Aug 15, 1996
IPC: A61C 8/00
B25B 23/10
Applicants: INSTITUT STRAUMANN AG
BERSET, Cédric
EGGIMANN, René
SUTTER, Francis
Inventors: BERSET, Cédric
EGGIMANN, René
SUTTER, Francis
Title: DEVICE FOR HOLDING SMALL SCREWS USING AN ELASTICALLY CLAMPING RING
Abstract:
The device for holding small screws comprises an elastically clamping ring (35) fitted either on a screwdriver (3) or in the slot of the screw to be turned. The screwdriver (3) has a section (36) matching the female slot in the screw head. In a groove (34) near the face (33) of the screwdriver blade (32) there is an elastic, unbreakable O-ring (35) which ensures that the screw fitted on the screwdriver blade (32) remains attached thereto by clamping in the manner of a plug connection. The functioning of the second embodiment is similar. The O-ring (35) consists of rubber or plastic, e.g. Viton®. The advantages of the device are that the screw to be inserted is securely held and the securing element is unbreakable and has a long useful life.