Tap safety cover
OwnerRobert Schaefer, Michael Schaefer +1inventors
InventorsRobert Schaefer, Michael Schaefer, Bonnie Schaefer
Life of this patent
Estimating the term…
Abstract
The tap safety cover conceals a rotating tap or the like to prevent a worker from contacting the sharp cutting edges of the tool during operation. The device includes a tool holder which secures in the chuck or bit holder of a rotary power tool. A hollow cylindrical barrel is affixed to the tool holder, with an extension sleeve telescoping from the barrel. The tap extends concentrically through the tool holder, barrel, and sleeve, and is completely covered when the sleeve is extended. A coil spring in the barrel urges the sleeve to a fully extended position, with the sleeve retracting as it is pushed back by the workpiece as the tap penetrates a previously drilled hole in the workpiece.
Claims18
A tap safety cover, comprising:
- a tool bit holder having a tool bit attachment passage disposed concentrically therethrough, a power tool attachment end, and a barrel attachment end opposite the power tool attachment end;
- a hollow, cylindrical barrel extending concentrically from the barrel attachment end of said tool bit holder;
- a hollow, cylindrical extension sleeve slidingly captured within said barrel and partially extendable from said barrel;
- and
- a spring disposed within said barrel between the barrel attachment end of said tool bit holder and said extension sleeve, said tool bit holder, said barrel, said extension sleeve, and said coil spring all defining a concentric tap installation passage therethrough.
A tap safety cover, comprising:
- a tool bit holder having a tool bit attachment passage disposed concentrically therethrough, a power tool attachment end, and a barrel attachment end opposite the power tool attachment end;
- a hollow, cylindrical barrel extending concentrically from the barrel attachment end of said tool bit holder;
- a hollow, cylindrical extension sleeve slidingly captured within said barrel and extendable from said barrel;
- and
- a conical coil spring disposed within said barrel between the barrel attachment end of said tool bit holder and said extension sleeve.
A tap safety cover in combination with a tap, comprising:
- a tool bit holder having a tool bit attachment passage disposed concentrically therethrough, a power tool attachment end, and a barrel attachment end opposite the power tool attachment end;
- a hollow, cylindrical barrel extending concentrically from the barrel attachment end of said tool bit holder, and rotationally affixed relative thereto;
- a hollow, cylindrical extension sleeve slidingly captured within said barrel;
- a spring disposed within said barrel between the barrel attachment end of said tool bit holder and said extension sleeve;
- said tool bit holder, said barrel, said extension sleeve, and said coil spring all defining a concentric tap installation passage therethrough;
- and
- a tap having a threaded cutting portion and a square drive end, the tap being removably attached to the holder and disposed within said tap installation passage.
Dependencies are inferred from the claim text.