Patent US3708191A successfully refreshed from Google Patents.
US3708191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary spring unit for locks
Assignee: Schlage Lock Co LLC
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Filing: 1971-06-23
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Granted: 1973-01-02
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Expires: 1991-06-23
Abstract
Abstract An auxiliary spring unit is for use with locks having a frame with a flat thereon and having a hand hold adapted to be mounted on a spindle rotatable on the frame. The unit has a capsule including a cylindrical cup with an inturned flange. A ring is rotatably disposed within the cup and has walls defining axially extending pockets. A closure plate interlocked with the flange has a flat engaging the flat on the frame and has lugs extending axially toward, or in substantially axial alignment with, the pockets. Springs curved within the cup bear simultaneously against the pocket walls and against the lugs to act as yieldable positioning devices.
Inventors
- 👤 D Hegedus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:17
CPC Classifications
E; E05; E05B; E05B3/00; E05B3/06; E05B3/065; Y; Y10; Y10T; Y10T292/00; Y10T292/03; Y10T292/82
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
117 words
An auxiliary spring unit for locks having a frame with a flat thereon and having a rotor adapted to be mounted on a spindle rotatable on said frame comprising a capsule including a cylindrical cup having an inturned flange, a ring rotatably disposed within said cup and having walls defining an axially extending pocket, a closure plate, means for interlocking said closure plate and said flange, means defining a flat on said closure plate adapted to engage said flat on said frame, a lug on said closure plate extending axially toward and in substantial axial alignment with said pocket, and a spring within said cup and adapted to bear against said pocket wall and against said lug.
Claim 2
Dependent Claim
117 words
An auxiliary spring unit for locks having a frame with a flat thereon and having a rotor adapted to be mounted on a spindle rotatable on said frame comprising a capsule including a cylindrical cup having an inturned flange, a ring rotatably disposed within said cup and having walls defining an axially extending pocket, a closure plate, means for interlocking said closure plate and said flange, means defining a flat on said closure plate adapted to engage said flat on said frame, a lug on said closure plate extending axially toward and in substantial axial alignment with said pocket, and a spring within said cup and adapted to bear against said pocket wall and against said lug.
Claim 3
Dependent Claim
38 words
A device as in claim 1 including a second pocket and a second lug circumferentially spaced from said pocket and said lug and in which said spring is adapted to bear against both of said pockets and lugs.
Claim 4
Dependent Claim
24 words
A device as in claim 2 including a second spring within said cup and adapted to bear against both of said pockets and lugs.
Claim 5
Dependent Claim
40 words
A device as in claim 1 including means forming a notch in said flange, said notch having a pair of end walls adapted to serve as stops, one of said end walls being in substantial axial alignment with said pocket.
Claim 6
Dependent Claim
37 words
A device as in claim 1 for use with a recess in said frame around said spindle in which said capsule surrounds said spindle and when in engagement with said flat is disposed entirely within said recess.
Claim 7
Dependent Claim
37 words
A device as in claim 1 in which said spindle has an axially extending slot and including a rotor on said spindle and extending into said slot and means on said rotor extending axially into said pocket.
Claim 8
Dependent Claim
16 words
A device as in claim 6 including means for urging said capsule axially toward said rotor.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |