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US 10,493,537 B2Granted
Keyhole saw
AssigneeHilti Aktiengesellschaft
InventorsMaximilian Sirch, Helmut Happach, Herbert Muenzenberger
Life of this patent
Estimating the term…
Abstract
A tool for creating a wall opening. The tool includes a hole saw; and a centering jig having a center axis, where the centering jig is constructed as a centering ring, into which the hole saw can be pushed at least partly, and in that both the hole saw and the centering ring have on their circumference an opening such that this can be pushed transverse to the center axis completely onto a line.
Claims10
A tool for creating a wall opening, the tool comprising:
- a hole saw;
- and
- a centering jig having a center axis,
- wherein the centering jig comprises a centering ring to receive the hole saw, and
- wherein, when assembled for cutting, the hole saw has a circumferential cutting surface comprising a first opening and the centering ring has a circumferential surface comprising a second opening, the first and second openings to allow the hole saw and the centering ring to be pushed in a direction transverse to the center axis around a line.
2 more elements
Dependencies are inferred from the claim text.