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This is a record of a document published elsewhere, first published by the United States Patent and Trademark Office, as US-5340245-A, on 23 August 1994. OpenTechnical did not first disclose it. The identifier, hashes and timestamps below record what this library served and when, not when the material became public. View the original.

OT-2026-000003337

Device on portable machine tools

Published
Permanent URL
Classification
Tools & Tooling › Powered Hand Tools
Assignee
BOSCH GMBH ROBERT
Original source
US-5340245-A, the United States Patent and Trademark Office, 23 August 1994
Document SHA-256
7789a539bb68c3abb59dfb9632468d3b13d05b1c0b107e69b0454d0877d863d5

A device for transmitting a rotary and/or percussive movement to a tool is formed in such a way that the associated tools having three grooves arranged in rotationally symmetrical fashion can likewise be clamped in drill chucks having three chuck jaws. In addition, the tool is to have the limited axial mobility required when hammer drilling or chiselling. For this purpose, the device is equipped with three rotary driving elements arranged in a location hole and projecting inwards. The rotary driving elements are arranged in rotationally symmetrical fashion, are of equal width and have flanks which extend approximately parallel to one another. One of the rotary driving elements is longer in the radial direction than the other two in order to guarantee positionally correct insertion of the tool and satisfactory locking of a locking body in a closed groove of the tool. The rotary driving elements are fixed immovably in the location hole. A blocking element is arranged at least at one side wall of the open groove and narrows its otherwise free cross-section.

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Abstract

A device for transmitting a rotary and/or percussive movement to a tool is formed in such a way that the associated tools having three grooves arranged in rotationally symmetrical fashion can likewise be clamped in drill chucks having three chuck jaws. In addition, the tool is to have the limited axial mobility required when hammer drilling or chiselling. For this purpose, the device is equipped with three rotary driving elements arranged in a location hole and projecting inwards. The rotary driving elements are arranged in rotationally symmetrical fashion, are of equal width and have flanks which extend approximately parallel to one another. One of the rotary driving elements is longer in the radial direction than the other two in order to guarantee positionally correct insertion of the tool and satisfactory locking of a locking body in a closed groove of the tool. The rotary driving elements are fixed immovably in the location hole. A blocking element is arranged at least at one side wall of the open groove and narrows its otherwise free cross-section.

1. Drawings

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[0002]Sheet 2.

[0003]Sheet 3.

Publication information

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Citation

OpenTechnical Publication OT-2026-000003337, “Device on portable machine tools,” published September 15, 2026 at 20:12:10 UTC, https://opentechnical.org/p/OT-2026-000003337.

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Terms

This record reproduces a document published elsewhere and is provided for reference and study. Rights in the original remain with its owner. See the publication policy.