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Flat chisel

A flat chisel and flat technology, which is applied in the field of flat chisel of reinforced concrete, can solve the problem that it is not suitable for demolition of reinforced concrete.

Inactive Publication Date: 2019-04-02
HILTI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, flat chisels are less suitable for demolition of reinforced concrete

Method used

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  • Flat chisel
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Examples

Experimental program
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Effect test

Embodiment Construction

[0022] figure 1 An exemplary flat chisel 1 is shown. The user can insert the flat chisel 1 with the shaft 2 into the electric chisel. The cutting edge 3 of the flat chisel 1 is pressed against the foundation. The striking mechanism of the electric chisel applies an impact to the striking surface 4 on the shaft 2 . The shock wave of the impact passes through the shaft 2 and the working section 5 of the flat chisel 1 and drives the cutting edge 3 into the foundation.

[0023] The shaft 2 of the exemplary flat chisel 1 is prismatic with a hexagonal cross-section. Alternatively, the shaft 2 can also have a circular cross section. The impact surface 4 forms the end face of the shaft 2 that is exposed and remote from the cutting edge 3 . The impact surface 4 can be designed as a spherical cap.

[0024] The exemplary shaft 2 has a groove 6 which is closed along a longitudinal axis 7 . The shaft 2 can be inserted into the tool holder of the power chisel. A locking body, such ...

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PUM

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Abstract

The flat chisel (1) according to the invention has a longitudinal axis (7), a shank (2) and a sheet-like working section (5). The shank (2) has a striking surface (4) perpendicular to the longitudinalaxis (7). The working section (5) has a cutting edge (3) perpendicular to the longitudinal axis (7). The cutting edge (3) has a saddle-shaped design.

Description

technical field [0001] The invention relates to a flat chisel for processing mineral materials, especially reinforced concrete. Background technique [0002] Depend on US 2900178A A flat chisel is known. Flat chisels have a shaft and a plate-shaped working section. The cutting edge of the working section is dome-shaped so that the tip lies on the longitudinal axis. This design of the flat chisel contributes to high extraction / demolition efficiency, since the impact force introduced through the tip is introduced centrally into the foundation along the longitudinal axis. However, flat chisels are less suitable for demolition of reinforced concrete. SUMMARY OF THE INVENTION [0003] The flat chisel according to the invention has a longitudinal axis, a shaft and a plate-shaped working section. The shaft has an impact slope perpendicular to the longitudinal axis. The working section has cutting edges erected transversely to the longitudinal axis. The cutting edge is form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25D17/02B25D3/00B28D1/26
CPCB28D1/26B25D3/00B25D17/02E21B10/36B25D2222/42B25D2222/72
Inventor P·格罗德
Owner HILTI AG