Dummy knob
AssigneeNewfrey LLC
InventorSteven Armstrong
Life of this patent
Estimating the term…
Abstract
A quick install dummy doorknob or lever comprises an exterior knob subassembly, an interior rose liner coupled to the exterior knob assembly, a knob catch, a retainer spring, and an interior knob. The knob catch is disposed inside the interior rose liner and includes a tooth for engaging the interior knob. The interior rose liner engages a pair of screws extending from the exterior knob subassembly. Rotation of the interior rose liner relative to the screws places the screws into retaining apertures in the interior liner, whereupon the screws can be tightened to hold the interior rose liner in position. The interior knob is inserted into a recess formed in the interior rose liner and engages the tooth on the knob catch through a slot formed in the recess.
Claims34
A doorknob assembly comprising:
- an exterior knob sub-assembly;
- an interior rose liner coupled to the exterior knob assembly and having a pair of annular sleeves and a first boss;
- a knob catch having a first projection and a second projection, the first projection engaging the first boss and the second projection being disposed between the annular sleeves;
- and
- an interior knob coupled to the knob catch.
A doorknob assembly comprising:
- an exterior knob sub-assembly;
- an interior rose liner coupled to the exterior knob assembly;
- a knob catch coupled to the interior rose liner;
- and
- an interior knob having a shank, the shank engaging the knob catch.
A doorknob assembly comprising:
- an exterior knob sub-assembly;
- an interior rose liner coupled to the exterior knob assembly and including a central recess having a generally cylindrical sidewall and a bottom wall and a stem extending from the bottom wall;
- a knob catch disposed adjacent the interior rose liner;
- a spring disposed adjacent the knob catch for biasing the knob catch toward a locking position;
- and
- an interior knob including a shank operatively disposed in the central recess and configured to receive the stem.
A doorknob assembly comprising:
- an exterior knob sub-assembly;
- an interior rose liner coupled to the exterior knob assembly and having a pair of annular sleeves and a lower boss;
- a knob catch disposed adjacent the interior rose liner;
- a retainer coupled to the interior rose liner for retaining the knob catch in position and for biasing the knob catch toward a locking position;
- and
- an interior knob coupled to the knob catch.
A method for installing a dummy doorknob comprising the steps of:
- providing an exterior knob assembly having fasteners;
- providing an interior rose liner having a central recess, openings for receiving and retaining the fasteners, and a knob catch;
- providing an interior knob;
- inserting the exterior doorknob assembly through a hole in a door;
- aligning the openings in the interior rose liner with the fasteners;
- engaging the fasteners with the holes and rotating the interior rose liner;
- inserting the interior knob into the central recess and engaging the interior knob with the knob catch.
A doorknob assembly comprising:
- an interior rose liner including a central recess having a generally cylindrical sidewall and a bottom wall and a stem extending from the bottom wall;
- a knob catch disposed adjacent the interior rose liner;
- a spring disposed adjacent the knob catch for biasing the knob catch toward a locking position;
- and
- an interior knob including a shank operatively disposed in the central recess and configured to receive the stem.
Dependencies are inferred from the claim text.