Patent ID: 7401662

Claim:
A powered hand tool comprising: a. a pneumatic motor including: i. a cylinder axially disposed with a rotary shaft; ii. a pneumatic motor rear end including a rear portion of said cylinder engaged with a rear thrust plate and a rear bearing, said rear bearing also engaged with the rear end of said rotary shaft; and iii. a pneumatic motor front end including a front portion of said cylinder engaged with a front bearing support plate, a front bearing and a front thrust plate, said front bearing also engaged with the front end of said rotary shaft; b. a main body formed as a hollow tube member, a main body rear end being formed with a fluid inlet and a fluid outlet, said main body being axially disposed for engagement with said pneumatic motor, a main body front end, said rotary shaft of said pneumatic motor extending out of said main body front end wherein the diameter of said pneumatic motor is smaller than the diameter of said hollow tube member; c. an internal isolation layer composed of a vibration isolation material placed in said hollow tube member so that said vibration isolation material is engaged with and adjacent the circumferentially inward surface of said main body front end and said pneumatic motor to prohibit metal to metal contact between said main body and said pneumatic motor; d. a lock nut engaging said main body front end fixing the position of said pneumatic motor front end within said main body; e. an inlet bushing engaging main body rear end for attachment of said pneumatic hand tool to a compressed fluid source, said inlet bushing fashioned with fluid passages to communicate with a plurality of fluid outlet holes in said main body rear end; and, f. a throttle mechanism to control fluid inlet and operation of said pneumatic motor.