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EP0457740A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

A vibrator damped hand held rotary grinding machine

Assignee: Atlas Copco Industrial Technique AB
•
Filing: 1991-05-03
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Granted: —
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Expires: 2011-05-03
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Abstract

Abstract A vibration damped hand held rotary grinding machine comprising a housing (10) with at least one handle (17, 18), a rotation motor (11), an output shaft (13) drivingly coupled to the motor and having mounting means (14) for attachment of a grinding wheel (15), and a sector-shaped non-resilient safe guard (19) which is rigidly attached to the housing (10) and surrounding partially the grinding wheel (15) and which has an arcshaped rim portion (20) encircling partially the grinding wheel circumference. A vibration damping inertia means (22; 22a, 22b) is rigidly associated with the safe guard (19) on or adjacent the rim portion (20), such that the centre of gravity of substantially all axial plane cross sections through the inertia means (22; 22a, 22b) is located at a radius (R₁) of at least 90% of the rim portion (20) radius (R). Preferably, the safe guard (19) is semicircular and the inertia means (22; 22a, 22b) extends from both ends of the safe guard rim portion (20).

Inventors

  • 👤 Mats Cornelius Holmin
  • 👤 Sten Herman Olsson
  • 👤 Lars Torbjörn Skogsberg

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-04 17:27
CPC Classifications
B; B24; B24B; B24B55/00; B24B55/04; B24B23/00; B24B23/02; B25; B25F; B25F5/00; B25F5/006

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 114 words
A hand held rotary grinding machine, comprising a housing with at least one handle, a rotation motor, an output shaft drivingly coupled to said motor and having mounting means for attachment of a grinding wheel, and a sector shaped nonresilient safe guard rigidly mounted on said housing and surrounding partially said grinding wheel, said safe guard having an arc-shaped rim portion encircling partially the grinding wheel circumference, characterized in that a vibration damping inertia means is rigidly associated with said safe guard, and that the centre of gravity of substantially all axial plane cross sections through said inertia means is located at a radius of at least 90% of the rim portion radius (R).
Claim 2
Dependent Claim 32 words
Grinding machine according to claim 1, wherein the centre of gravity of substantially all axial plane cross sections through said inertia means is located at a radius exceeding the rim portion radius.
Claim 3
Dependent Claim 32 words
Grinding machine according to claim 1 or 2, wherein said inertia means extends from both ends of said rim portion and has a total length of less 50% of said rim portion.
Claim 4
Dependent Claim 27 words
Grinding machine according to claim 1 or 2, wherein said inertia means comprises an arc-shaped one-piece metal member extending over the entire length of said rim portion.
Claim 5
Dependent Claim 26 words
Grinding machine according to anyone of claims 1-5, wherein the mass of said inertia means is more than 10% of the total mass of the machine.

References Cited (Backward Citations)

DE1068145B Cited
FR1052262A Cited

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