Knob attachment for door latch
AssigneeNorris Industries, Inc.
InventorsDennis G. Potter, Hagen Dietrich, Joseph Potschka
Life of this patent
Estimating the term…
Abstract
A door latch makes use of moldable material for most of the individual parts with opposite roses adapted to interlock with each other and be held together with a single screw on the axial center line of the knobs and accessible from the outside. Prior to installation of the latch on the door each knob is subassembled with the corresponding rose by employment of an arcuate shoulder on an inner central portion of the knob which is rotated to a position of engagement with a complementary arcuate shoulder in the rose. Rotation inhibiting detents prevent accidental disassembly until the spindle is mounted in place and the spindle then locks the knob against disassembly as long as the latch remains mounted on the door.
Claims7
An operating assembly for a door lock comprising a rose member,
- a knob member having a rotatable retention mounting on the rose member and
- an axially extending removable spindle,
- a spindle mounting mass in said knob member having a spindle retaining pocket,
- a spindle movement clearance space in said rose member in axial alignment with said pocket,
- an axially outwardly facing shoulder on said mass extending in an arcuate direction,
- an axially inwardly facing arcuate shoulder on said rose member in a position or rotationally moving retention with said outwardly facing shoulder when in assembled condition,
- means forming an accommodation space in said rose member diametrically opposite said inwardly facing arcuate shoulder of size greater than said mounting mass for temporary reception of said mounting mass during assembly,
- and complementary stop means respectively on said rose member and said knob member acting between said rose member and said knob member at limits of rotational movement of said knob member.
An operating assembly for a door lock comprising a rose member,
- a knob member having a rotatable retention mountng on the rose member and
- an axially extending removable spindle,
- a spindle mounting mass in said knob member having a spindle retaining pocket,
- a spindle movement clearance space in said rose member in axial alignment with said pocket,
- an axially outwardly facing shoulder on said mass extending in an arcuate direction,
- an axially inwardly facing arcuate shoulder on said rose member in a position of rotationally moving retention with said outwardly facing shoulder when in assembled condition,
- means forming an accommodation space in said rose member diametrically opposite said inwardly facing arcuate shoulder of size greater than said mounting mass for temporary reception of said mounting mass during assembly,
- and stop means acting between said rose member and said knob member at limits of rotational movement of said knob member,
- said stop means being on said rose member and extending into said accommodation space.
Dependencies are inferred from the claim text.