Electric hand tool
OwnerArthur W. Smithinventor
Life of this patent
Estimating the term…
Abstract
A power hand tool including a manually engageable housing, a prime mover within the housing, a tool bit engaging chuck projecting from the housing, power transmission means within the housing and between the prime mover and the chuck; said power transmission is operable to selectively drive the chuck rotatively or reciprocally. The chuck is driven rotatively by a tube driven by the transmission and coupled with the chuck for free relative axial movement and for relative circumferential drive; the chuck is driven reciprocally by an eccentric drive means connected with the transmission and coupled with the chuck for free relative rotation and for reciprocal axial drive.
Claims10
A power tool comprising an elongate manually engageable housing with front and rear ends and defining a longitudinal axis of the tool, an elongate axially extending rotary drive tube rotatably supported by the housing and having a rear end portion accessible from within the housing and a forward portion projecting forwardly from the housing, an elongate chuck with a rear portion projecting into the tube and a forward tool bit engaging portion projecting forwardly from the tube, rotary coupling means between the tube and the chuck establishing rotary driving engagement therebetween, an axially shiftable drive member rearward of the chuck, axial coupling means between the chuck and the member establishing axial driving engagement therebetween, said axial driving engagement being substantially free of lost motion between said drive member and said chuck, a prime mover in the housing, a power transmission connected with the prime mover and including an eccentric drive means connected with said member and a rotary driven element connected with the tube.
Dependencies are inferred from the claim text.