Circular saw

Patent metadata

Field	Value
Publication number	US-10259061-B2
Application number	US-201113193324-A
Country	US
Kind code	B2
Filing date	Jul 28, 2011
Priority date	Jul 30, 2010
Publication date	Apr 16, 2019
Grant date	Apr 16, 2019

Abstract

A circular saw, in particular hand circular saw, is disclosed. The circular saw has a workpiece support surface, a saw blade and a protective cover, which covers the saw blade in a region above a workpiece to be processed. The protective cover has such a geometry and position with respect to the saw blade that a straight line, which originates from the first deflection of a tangent applied at the intersection of the saw blade circumference with the workpiece support surface from the protective cover encloses an angle of up to 30°, in particular up to 20°, with a line perpendicular to the workpiece support surface.

First claim

What is claimed is:

1. A circular saw, comprising:
a workpiece support plate with a workpiece support surface, the workpiece support surface defining a plane;
a saw blade having a circumference; and
a protective cover which covers the saw blade, wherein the protective cover has an arcuate inner surface with a deflection point that is defined on the arcuate inner surface, wherein the deflection point is located on a straight line that originates from an intersection point of the saw blade circumference and the plane of the workpiece support surface, wherein the straight line is tangent to the saw blade circumference;
wherein a radial distance between the arcuate inner surface and the saw blade circumference is measured on a radial line of the saw blade, and wherein the radial distance is smallest where the radial line intersects the arcuate surface at a plane of the workpiece support plate and continuously increases as the radial line rotates along the arcuate inner surface in a direction away from the workpiece support plate and past the deflection point;
wherein the deflection point is less than 20 mm from the intersection point as measured on the straight line;
wherein the deflection point is less than 10 mm from the saw blade circumference; and
wherein the arcuate inner surface includes a baffle plate, the deflection point being disposed on the baffle plate.

2. The circular saw according to claim 1 , wherein the protective cover has axially opposing side walls each of which partially covers the saw blade in an axial direction, and wherein an inner side of each of the side walls has a strip extending therefrom.

3. The circular saw according to claim 1 , wherein the protective cover has a viewing area, wherein the viewing area abuts the workpiece support surface.

4. The circular saw according to claim 1 , wherein the protective cover is made of a transparent plastic at least in a region of and/or around the baffle plate.

5. The circular saw according to claim 1 , wherein the baffle plate is fastened internally on the protective cover.

6. The circular saw according to claim 1 , wherein the protective cover has a main section fastened on a housing of the circular saw, wherein the main section is made of a non-transparent material.

7. The circular saw according to claim 6 , wherein the main section has a recess for a viewing area.

8. The circular saw according to claim 1 , wherein the circular saw is a hand circular saw.

Assignees

• Haas Guenter
• Hilti Ag

Inventors

• Haas Guenter

Classifications

• B23D45/16

  Hand-held sawing devices with circular saw blades · CPC title

• B27B9/00

  Portable power-driven circular saws for manual operation (details or components, e.g. handles, casings, of portable power-driven tools not particularly related to the operation performed B25F5/00) · CPC title

• B23D59/006 Primary

  for removing or collecting chips · CPC title

• Y10T83/7734

  With guard for tool · CPC title

• B27G19/04

  for manually-operated power-driven circular saws · CPC title