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US 8,784,023 B2Granted
Screw and method to identify the screw
AssigneeHilti Aktiengesellschaft
InventorsJochen Kuntner, Peer Schmidt
Life of this patent
Estimating the term…
Abstract
A screw has a head whose underside has impressions or embossings and faces towards the tip. The underside is divided into at least five sectors of the same size. Three-fifths of the sectors exhibit an identical pattern of impressions or embossings and at least one sector is provided with a different pattern of impressions or embossings or else with no impressions or embossings.
Claims7
A screw comprising:
- a head having an underside, the underside having impressions or embossings, the underside facing towards a screw tip and being divided into at least five sectors of the same size, at least three-fifths of the sectors exhibiting an identical pattern of the impressions or embossings and at least one sector is provided with a different pattern of the impressions embossings or else with no impressions or embossings;
- wherein a first impression or embossing is closest to a second impression or embossing in one direction of rotation, and a third impression or embossing is closest to the second impression or embossing counter to the one direction of rotation, a first angle between the first impression or embossing and the second impression or embossing being different from a second angle between the second impression or embossing and the third impression or embossing, wherein the first angle is twice as large as the second angle.
Dependencies are inferred from the claim text.