Abstract

An improved method is provided for controlling a power tool having a rotary shaft. The method includes: disposing an inertial mass in a housing of the power tool, such that the inertial mass is freely rotatable about an axis of rotation which is axially aligned with the rotary shaft; monitoring rotational motion of the power …

Legal parties

Party
Inventors (applicants): Daniel Puzio, Robert Bradus, David A. Carrier
Assignees (initial): Black & Decker Inc. (Newark, US)
Agents: Harness, Dickey & Pierce, P.L.C. (attorney)

The application was examined by Robert Long (USPTO dept. 3721)

Claims

  • 1. A method for initiating a protective response in a power tool having a rotary …
  • 2. The method of claim 1 further comprises disposing an inertial mass in a housing …
  • 3. The method of claim 2 further comprises disposing the inertial mass in the housing …

Cited documents

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Brief Description of the Drawings

FIG. 1 is a longitudinal sectional view of an exemplary rotary hammer configured in accordance with the present invention; FIG. 1A is a longitudinal sectional view of an alternative embodiment …

Description

Field of the Invention

The present invention relates generally to a safety mechanism for a rotary hammer and, more particularly, to a method for detecting a bit jam condition in a power tool having …

Cross-Reference to Related Applications

This application is a continuation of U.S. patent application Ser. No. 12/765,436 filed on Apr. 22, 2010 which is a continuation of U.S. patent application Ser. No. 12/355,086 filed on Jan. …

Detailed Description of the Preferred Embodiments

FIG. 1 illustrates an exemplary power tool 10 having a rotary shaft 12. In particular, the exemplary power tool is a rotary hammer. While the following description is provided …

More details about Safety Mechanism for a Rotary Hammer

Miscellaneous patent data

The applicant's city - Bel Air, state - MD, the recorded applicant's name is Robert Bradus, the patent particularly claims a method for initiating a protective response in a power tool having a rotary…, was examined by Robert Long, the main examiner (3721 USPTO department), the assignee is categorized as a United States company, the application number is 13/081,544 (U.S.), invented by Robert Bradus et al., the grant publication date is Oct. 15, 2013, the inventor's city is Bel Air, state - MD, the published inventor's name is Bradus Robert, the invention details are shown in 30 figures, the invention description is illustrated by 23 drawings, the assignee company is Black & Decker Inc. located in Newark (US), the protection scope is defined by 12 claims, the drawings include the following: Safety Mechanism for a Rotary, Longitudinal sectional view of an alternative, plan view of a rotational, Longitudinal sectional view of an exemplary, the invention is named Safety Mechanism for a Rotary Hammer, the application publication date is Apr. 7, 2011, categorized under Automatic Control of Power Operated Means as a primary classification, the term of the patent grant was extended by 271 days, the recorded agent - Harness, Dickey & Pierce, P.L.C., similar classification categories are Shaped-charge perforators, electrically generated heat, Fluid supplied through working chamber of idled cyclically operable drive motor, Endless flexible drive means, Surface drives for drop hammers, e.g. with a cable, specially adapted for drilling underwater formations from a floating support using heave compensators supporting the drill string, Reciprocating drive member connected to pulsing fluid column, Hammer head moves out of arcuate or rotary path, Supply for cleansing bypasses motor chamber, Fishing for or freeing objects in boreholes or wells, the claim number 1 is selected as exemplary, the grant number is 08555997.

Invention classification information

The invention is classified under specially adapted for directional drilling, e.g. slant hole rigs, Automatic Control of Power Operated Means. The designated search classifications include Automatic Control of Power Operated Means, Speed responsive, With speed responsive governor, Inertial flywheel, Responsive to condition of tool or tool-drive, Drive means responsive to torque or speed condition, Magnetic speed measuring or mechanical speed measuring with ancillary magnetic means or with ancillary electrical means, Proximity angle detector, Electric motor, Responsive to tool, Processes, Installed in rotary speed source, To control tool rotation.

Patent details
Publication number 08555997
Publication date Oct. 15, 2013
Kind code B2
Application number 13/081,544
Application date Apr. 7, 2011
Application type U
Application series code 13
Extension term 271
National classification 173/2
Total number of claims 12
Exemplary claims 1
Number of drawings 23
Number of figures 30
Terminal disclaimer
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