Power tools

• US 20060118315A1
• Filed: 01/17/2006
• Published: 06/08/2006
• Est. Priority Date: 03/16/2000
• Status: Active Grant

• Current Assignee: Hitoshi Suzuki, Masahiro Watanabe
• Original Assignee: Hitoshi Suzuki, Masahiro Watanabe
• Inventors: Watanabe, Masahiro, Suzuki, Hitoshi
• Granted Patent: US 7,896,098 B2
• Time in Patent Office: Days
• US Class Current: 173/2
• CPC Class Codes: B25B 21/02 with means for imparting impact to screwdriver blade or nut socket
• CPC Class Codes: B25B 23/1405 for impact wrenches or screwdrivers
• CPC Class Codes: B25B 23/1475 for impact wrenches or screwdrivers
• CPC Class Codes: B25F 5/00 Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

Abstract

Power tools are taught that may include, for example, means for detecting impact sounds generated, e.g. by a hammer strikes an anvil or by oil pulse from an oil unit. The detecting means may include a receiver (30) adapted to selectively convert sound within a narrow frequency range into electric signals. Preferably, the impact sounds fall within the narrow frequency range of the receiver (30). A processor 38 may be utilized to control the motor (22) in order to stop the rotation of the hammer when a pre-determined number of impact sounds has been detected by the detecting means. In addition or in the alternative, various means for setting various operating conditions are taught, including dials 34, sound sensors 30, keypads and remote control devices 250. Further, means for performing maintenance condition status checks are taught.

Claims