US4062579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Knob attachment for door latch
Assignee: TRU-FORM TOOL & Manufacturing INDUSTRIES Inc
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Filing: 1976-08-09
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Granted: 1977-12-13
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Expires: 1996-08-09
Abstract
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.
Inventors
- 👤 Dennis G. Potter
- 👤 Hagen Dietrich
- 👤 Joseph Potschka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:09
CPC Classifications
E; E05; E05C; E05C1/00; E05C1/08; E05C1/12; E05C1/16; E05C1/163; Y; Y10; Y10S; Y10S292/00; Y10S292/38; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0977; Y10T292/0982; Y10T292/0983; Y10T292/59; Y10T292/85
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
159 words
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.
Claim 2
Dependent Claim
159 words
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.
Claim 3
Dependent Claim
163 words
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.
Claim 4
Dependent Claim
163 words
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.
Claim 5
Dependent Claim
36 words
An operating assembly as in claim 2 wherein said stop means and said mass are mutually yieldable during assembly to enable movement of said mounting mass from said accommodation space to said clearance space during assembly.
Claim 6
Dependent Claim
35 words
An operating assembly as in claim 2 wherein said mounting mass is arcuate presenting opposite end edges and said stop means comprises two radially inwardly extending projections located one opposite each of said end edges.
Claim 7
Dependent Claim
29 words
An operating assembly as in claim 2 wherein said inwardly facing arcuate shoulder extends no more than substantially 180° and said outwardly facing shoulder extends for less than 180°.
Claim 8
Dependent Claim
40 words
An operating assembly as in claim 2 wherein there are mutually rotatable bearing means respectively on the rose member and knob member adjacent said axially inwardly and outwardly facing shoulders for stabilizing the alignment of said knob and rose members.
Claim 9
Dependent Claim
51 words
An operating assembly as in claim 4 wherein said radially inwardly extending projections are yieldable and each end of said mass has a deflecting action of said stop means during rotation of the knob in an assembly direction and a stopping action for said knob during rotation in an opposite direction.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |