US4686840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lock guard
Assignee: Individual
•
Filing: 1986-12-24
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Granted: 1987-08-18
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Expires: 2006-12-24
Abstract
Abstract A lock guard to prevent picking of locks by thieves, which guard is particularly useful for mailboxes subject to weather and vending machines which store money. The guard is essentially a rectangular box having a side opening for insertion of the padlock and a pair of slots at right angles to each other, one slot below the side opening and the other at right angles on the front portion of the box. By clipping a key to a lever and inserting it in the first mentioned slot and then rotating it in the last mentioned slot the padlock may be unlocked.
Inventors
- 👤 Clark McCarroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:14
CPC Classifications
E; E05; E05B; E05B67/00; E05B67/38; E05B17/00; E05B17/14; Y; Y10; Y10T; Y10T70/00; Y10T70/40; Y10T70/413; Y10T70/487; Y10T70/493; Y10T70/80; Y10T70/8432; Y10T70/8622; Y10T70/8649
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
106 words
A lock guard for a padlock comprising a rectangular container having an opening in about one half portion of its side for insertion of the body of the padlock and having on the same side in the other half portion thereof, a pair of slots at right angles to each other and below the position of the padlock, to enable a leverage clip to insert the key into one of said slots, turn it 90° in the plane of the key, then insert the key into the barrel of the padlock and thereafter turn said clip through the other of said slots to unlock the lock.
Claim 2
Dependent Claim
106 words
A lock guard for a padlock comprising a rectangular container having an opening in about one half portion of its side for insertion of the body of the padlock and having on the same side in the other half portion thereof, a pair of slots at right angles to each other and below the position of the padlock, to enable a leverage clip to insert the key into one of said slots, turn it 90° in the plane of the key, then insert the key into the barrel of the padlock and thereafter turn said clip through the other of said slots to unlock the lock.
Claim 3
Dependent Claim
50 words
A lock guard as recited in claim 1 wherein said one of said slots has a portion of larger width in the area of insertion of the leverage clip than in the area closer to the lock whereby the key may be accurately positioned for insertion in the said barrel.
References Cited (Backward Citations)
CH267905A
Cited
US3559429A
Cited
US3751948A
Cited
US3714804A
Cited
US3765199A
Cited
US3857264A
Cited
US4218902A
Cited
US4576022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-17 | 1991-02-16 | 1991-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-17 | 1995-02-16 | 1995-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-17 | 1999-02-16 | 1999-08-18 | $7700.00 | Window Closed / Lapsed |