Power tool with spindle lock

a technology of power tools and spindles, which is applied in the direction of portable power-driven tools, metal-working equipment, portable grinding machines, etc., can solve the problems of large force required to ultimately “set” the screw, the hand grinder cannot reach many hidden or obstructed work surfaces, and requires excessive work or modification to reach many work surfaces
US20080014844A1Inactive Publication Date: 2008-01-17PONTIERI JAMES MATTHEW
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
PONTIERI JAMES MATTHEW
Publication Date
2008-01-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

A spindle lock equipped hand-held power tool, such as a grinder or circular saw, includes a housing assembly, a motor including a rotating armature shaft, a spindle carried externally of the housing adapted for selectively affixing and releasing a rotating cutting tool and a drive train which drivingly interconnects the motor armature shaft and spindle for the application of torque to the tool upon electrical energization of the motor. A lock member carried in the housing is selectively displaceable along a fixed axis between a locked position wherein it engages a rotating element of the drive train to prevent rotation of the spindle, and a released position. A spring continuously urges the lock member toward the released position. A manually operable lever selectively displaces the lock member between the released and locked positions.
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Description

RELATED APPLICATION

[0001] The present application claims the benefit of U.S. Provisional Application No. U.S. Ser. No. 60 / 831,436, entitled “POWER TOOL SPINDLE LOCK” filed 17 Jul. 2006.TECHNICAL FIELD

[0002] The present invention relates generally to hand-held power tools, and, more particularly, to such tools which include a driven spindle configured for drivingly engaging a sacrificial cutting or forming accessory.BACKGROUND OF THE INVENTION

[0003] Hand-held grinders are common tools that are used for a variety of applications. Typically, a grinder includes a motor that drives a wheel (such as a grinding wheel, wire brush, or cutting disc). Many grinders include a drive shaft from the motor and a gear system coupled to the drive shaft that changes the direction of rotation. Often, the direction of rotation is changed by 90°. Also, many grinders include a lock pin that can be pressed inwardly to lock the drive shaft relative to the housing of the grinder so that a clamping screw can be ...

Claims

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