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US 7,308,949 B2Granted
Concrete drill
AssigneeMax Co., Ltd.
InventorsKigen Agehara, Motoshige Akatsu, Naohide Murakami
Life of this patent
Estimating the term…
Abstract
A concrete drill for drilling concrete or the like by a diamond bit (5) attached to a front end of a bit drive shaft (4) projected forward from a main body (1) by driving to rotate the bit drive shaft (4) by a drive source (2) contained in the main body (1) in which the main body (1) is provided with a vibrating apparatus (8) for exerting a vibrating force a magnitude which is pulsated to change along the bit drive shaft (4) to the main body (1).
Claims7
A concrete drill comprising:
- a main body;
- a first motor;
- a second motor driven by electric current;
- a bit drive shaft projected forward from the main body;
- a diamond bit attached to a front end of the bit drive shaft;
- and
- a vibrating apparatus provided in the main body for exerting a vibrating force along the bit drive shaft to the main body, wherein the vibrating apparatus is driven by a rotation of the second motor, and a magnitude of the vibrating force is variable;
- wherein the first motor rotates the diamond bit by driving the bit drive shaft.
5 more elements
Dependencies are inferred from the claim text.