US3983724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Changeable combination padlock
Assignee: Master Lock Co LLC
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Filing: 1975-07-21
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Granted: 1976-10-05
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Expires: 1995-07-21
Abstract
Abstract In the present changeable combination padlock the blocking lever which at one end is pivotally associated with the clutch elements for the dialing wheels and at its other end with the shackle locking bolts, is uniquely non-detachably pivotally mounted, intermediate its ends, on an inner, rigidly mounted angular supporting plate; and a pair of coiled springs equally spaced from the side margins of the blocking lever react against the underside of the blocking lever to pull it, with evenly distributed force from its locking bolt-releasing position to its normal position. Additionally, projecting exteriorally of a portion of the padlock case is a turnable changer button which, when turned ninety degrees by an applied tool, coin or finger nail is effective to release certain shaft-carried clutch elements from the permutation wheels for combination changing purposes when the shackle is unlocked and projected to its open position.
Inventors
- 👤 Daniel J. Foote
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:25
CPC Classifications
E; E05; E05B; E05B37/00; E05B37/02; E05B37/025; E05B37/0048; E05B37/0058; Y; Y10; Y10T; Y10T70/00; Y10T70/40; Y10T70/413; Y10T70/417; Y10T70/422; Y10T70/424; Y10T70/70; Y10T70/7153; Y10T70/7322; Y10T70/7328
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
150 words
In a permutation lock, a body, a shackle movable therein and having a closed position and a projected open position, means for releasably locking said shackle in its closed position including a blocking lever, means for pivotally mounting said blocking lever within said body including studs spacedly carried by said blocking lever and a plate fixedly mounted within said body through which the blocking lever-carried studs movably project, a shaft movably mounted within said body, a plurality of permutation wheels carried by said shaft, clutch discs mounted on said shaft and movable therewith, there being a clutch disc for each permutation wheel, and a turnable member alined with said shaft and having an inner portion operatively associated with said shaft, the outer end portion of said turnable member being accessible exteriorally of the lock body whereby turning movements of the turnable member will move said shaft and the clutch discs.
Claim 2
Dependent Claim
150 words
In a permutation lock, a body, a shackle movable therein and having a closed position and a projected open position, means for releasably locking said shackle in its closed position including a blocking lever, means for pivotally mounting said blocking lever within said body including studs spacedly carried by said blocking lever and a plate fixedly mounted within said body through which the blocking lever-carried studs movably project, a shaft movably mounted within said body, a plurality of permutation wheels carried by said shaft, clutch discs mounted on said shaft and movable therewith, there being a clutch disc for each permutation wheel, and a turnable member alined with said shaft and having an inner portion operatively associated with said shaft, the outer end portion of said turnable member being accessible exteriorally of the lock body whereby turning movements of the turnable member will move said shaft and the clutch discs.
Claim 3
Dependent Claim
21 words
The permutation lock recited in claim 1 wherein the means for pivotally mounting the blocking lever within said body are non-disengageable.
Claim 4
Dependent Claim
30 words
The permutation padlock defined in claim 1 wherein said studs carry springs which react against portions of said fixed plate and function to bias the blocking lever under certain conditions.
Claim 5
Dependent Claim
30 words
The permutation padlock defined in claim 3 wherein said stud springs are equally spaced from opposite side margins of the blocking lever to exert uniform biasing forces on the latter.
Claim 6
Dependent Claim
25 words
The permutation padlock defined in claim 3 wherein said springs reacting on their studs, exert pulling forces against the under surface of the blocking lever.
Claim 7
Dependent Claim
48 words
Th permutation padlock defined in claim 1 wherein said shaft is axially shiftable upon turning movement of the turnable member in one direction, the shaft, when so shifted carrying the clutch discs therewith to disengage the same from their permutation wheels which do not move with the shaft.
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) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |