Door Lock Installation Jig
AssigneeNomis LLC
InventorJoseph Schramek
Life of this patent
Estimating the term…
Abstract
A backset jig is provided for guiding a hole saw. The jig includes a frame with a first leg positionable adjacent to a first side of a door panel, and a second leg positionable adjacent to a second side of the door panel. The first and second legs are operably coupled with each other by an intermediate portion designed to abut an edge of the door panel. The first leg includes a guide insert for forming a doorhandle borehole, and the intermediate portion includes a guide for forming a latch borehole. The guide insert includes a hole saw guide aperture with a hole saw teeth clearance region and a hole saw guide region, the latter of which has a smaller diameter than the former.
Claims16
A backset jig for guiding a hole saw for forming holes in a door panel having first and second sides and an edge extending between the first and second sides for installation of a door lock comprising:
- a frame including a first leg to be positioned adjacent the first side of the door panel in which a lock hole is to be formed, the frame having a first alignment tab slot, a second alignment tab slot, and a third alignment tab slot;
- an abutment for abutting the edge of the door panel;
- a hole saw guide insert having a hole saw guide aperture defining a guide aperture center, the hole saw guide insert having a first alignment tab and a second alignment tab, the second alignment tab angularly spaced from the first alignment tab by 90 degrees about the guide aperture center, the hole saw guide insert mountable to the first leg in a first position with the second alignment tab inserted into the second alignment tab slot positioning the guide aperture center a first distance from the abutment and in a second position with the second alignment tab inserted into the third alignment tab slot positioning the guide aperture center a second distance from the abutment.
A backset jig kit for guiding a hole saw for forming holes in a door panel having first and second sides and an edge extending between the first and second sides for installation of a door lock comprising:
- a hole saw having a cylindrical body having teeth at an end thereof and a central guide bit positioned radially inward of the teeth, each tooth extending axially from a root to a tooth tip, the central guide bit defining a hole saw central axis, the central guide bit having an exposed portion extending axially outward from the cylindrical body along the hole saw central axis, the expose portion of the guide bit having a distal end being spaced apart from the roots of the teeth a first distance measured along the hole saw central axis and perpendicular to a plane defined by the roots of the teeth;
- a frame including a first leg having an abutment surface to be positioned against the first side of the door panel in which a lock hole is to be formed;
- and
- a hole saw guide insert having a hole saw guide aperture, the hole saw guide aperture having a hole saw teeth clearance region having a first diameter and a hole saw guide region having a second diameter smaller than the first diameter, the hole saw teeth clearance region being positioned between the hole saw guide region and the abutment surface when the hole saw guide insert is mounted to the frame, the hole saw teeth clearance region having a depth measured from the abutment surface being equal to or greater than the first distance such that the teeth of the hole saw are fully received in the hole saw teeth clearance region when the tip of the central guide bit is aligned with the abutment surface.
Dependencies are inferred from the claim text.