Patents
US 7797973 B2: Hierarchical cylinder lock systems
- Granted
- 2010-09-21
- Filed
- 2008-03-12 application 12046756
- Type
- Utility · 15 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A hierarchical lock system includes a first cylinder lock having a cylindrical plug, rotatable, reciprocating tumbler pins, a slider disposed within the plug and a side bar that cooperates with the cylinder plug, the slider, and the tumbler pins to control rotation of the lock. A second cylindrical lock includes a cylindrical plug, reciprocating tumbler pins, a slider, and a side bar that cooperates with the cylindrical plug and the slider. A first key is configured to open both the first and second locks by elevating and rotating the tumbler pins, and moving the slider to an unlocked position with respect to the side bar. A second key is able to open only the second cylindrical locks by elevating but not rotating the tumbler pins and by moving the slider to an unlocked position with respect to the side bar.
Source: PVGPATDIS, file of 2026-04-10 (ipg100921.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| MEDECO SECURITY LOCKS, INC. 10 patents | US company or organization | Salem, VA | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Peter H. Field | Salem, VA | 17 | PVGPATDIS, file of 2026-04-10 | |
| David P. Sutherland | Roanoke, VA | 2 | PVGPATDIS, file of 2026-04-10 | |
| Clyde T. Roberson | Salem, VA | 6 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| E05B | Locks; accessories therefor; handcuffs | E05B27/0032 | PVGPATDIS, file of 2026-04-10 |
| Y10T | Technical subjects covered by former us classification | Y10T70/7446 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2016-06-09 | Name change Change of name | MEDECO SECURITY LOCKS, INCORPORATED signed 2015-12-31 | ASSA ABLOY HIGH SECURITY GROUP INC. SALEM, VA | 38934/595 | ECORSEXC, file of 2026-09-25 |
| 2008-03-12 | Assignment Assignment of assignor's interest | FIELD, PETER H. signed 2008-02-28 ROBERSON, CLYDE T. signed 2008-02-28 SUTHERLAND, DAVID P. signed 2008-02-28 | MEDECO SECURITY LOCKS, INC. SALEM, VA | 20640/826 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.