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US 2012/0267138 A1Published application
Hand-held power tool and production method
AssigneeHilti Aktiengesellschaft
InventorJosef Fuenfer
Life of this patent
Estimating the term…
Abstract
A production method provides for punching holes in a metal strip, cold-forming the metal strip to form a guide tube, and joining the lengthwise edges of the metal strip to each other by a seam or teeth so as to create a uniform material. Subsequently, a piston-like striker is inserted into the guide tube.
Claims9
A hand-held power tool with a pneumatic striking mechanism comprising:
- a motor-driven exciter;
- a guide tube having an inside;
- and
- a piston-shaped striker, the piston-shaped striker passing through the inside of the guide tube and, with the exciter, delimiting an air spring in the guide tube, the guide tube being made of a metal strip bent to form the guide tube with opposite lengthwise edges joined by at least one of a seam and a positive fit created by teeth.
1 more element
A production method for a hand-held power tool, comprising the steps of:
- creating holes in a metal strip;
- shaping the metal strip to form a tube;
- joining lengthwise edges of the shaped metal strip by at least one of a seam and a positive fit created by teeth;
- and
- inserting a piston-like striker into the tube after the joining.
2 more elements
Dependencies are inferred from the claim text.