Vibration isolated impact wrench

Details Vibration isolated impact wrench Vibration isolated impact wrench

2000-12-21

2001-11-27

Smith, Scott A. (Department: 3721)

Tool driving or impacting

Processes

C173S093000, C173S093500, C173S211000

Reexamination Certificate

active

06321853

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates generally to impact tools and, more particularly, to an impact wrench including vibration isolation.
BACKGROUND OF THE INVENTION
Impact tools such as impact wrenches are well known in the art. Generally, the impact tools include an air motor and a clutch mechanism. Typically, the impact tool transmits shock and vibration from the tool head to the handle. In turn, the shock and vibration is transmitted from the handle to an operator holding the handle.
SUMMARY OF THE INVENTION
The present invention provides a vibration isolated impact tool wherein an impact mechanism and a motor assembly are arranged into a cartridge assembly. An elastomeric member resiliently connects the cartridge assembly with a housing. The cartridge assembly is free to move axially and rotationally within the housing. The elastomeric member absorbs axial vibration and torsional vibration, reducing the vibration transmitted to an operator.
The present invention generally provides an apparatus comprising: a housing; an impact mechanism generating an axial force and a torsional force; a motor for rotating the impact mechanism; and an elastomeric member connecting the impact mechanism and the motor with the housing, and wherein the elastomeric member is attached such that the elastomeric member absorbs both axial and torsional forces. This aspect provides for a vibration isolated impact tool that reduces the axial and torsional forces received by the user of the tool.
The second aspect in accordance with the present invention provides a method comprising the steps of: providing a housing; providing a cartridge assembly including a motor and an impact mechanism; slidably receiving the cartridge assembly into the housing; and providing an elastomeric member connecting the cartridge assembly with the housing, wherein the elastomeric member absorbs axial and torsional vibrational forces. The second aspect provides similar advantages to those of the first aspect.
The third aspect in accordance with the present invention provides a cartridge, slidably received within a housing of an impact tool, comprising: a motor, having a first end adapted to be coupled to an elastomeric member; an impact mechanism, generating an axial force and a torsional force, having a first end operatively coupled to a second end of the motor; and an anvil operatively coupled to a second end of the impact mechanism. This aspect provides similar advantages to those of the first aspect.
The fourth aspect in accordance with the present invention provides an elastomeric member, resiliently mounted within a housing of an impact tool, comprising a first surface adapted to be coupled to a motor, a second surface adapted to be coupled to the housing of the impact tool, and means for attachment for allowing the elastomeric member absorb axial and torsional forces created within the impact tool. This aspect provides similar advantages as those in the first aspect.
The foregoing and other features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention.


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