Patents
US 8449216 B2: Manhole cover safety device
- Granted
- 2013-05-28
- Filed
- 2011-09-20 application 13236823
- Type
- Utility · 19 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A manhole cover assembly includes a frame that includes a central opening and a safety stop portion, and a cover hingedly attached to the frame such that the cover is pivotable between a closed position covering the central opening and an open position providing access to the central opening. A safety device is connected to the frame and the cover for locking the cover in the open position. Movement of the cover to the open position automatically moves the safety device to a locked position in which said safety device engages the safety stop portion and prevents movement of the cover to the closed position. When the cover is open, the safety device is manually movable between the locked position and an unlocked position in which the safety device is disengaged from the safety stop and permits movement of the cover to the closed position.
Source: PVGPATDIS, file of 2026-04-10 (ipg130528.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| East Jordan Iron Works, Inc. 5 patents | US company or organization | East Jordan, MI | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Kevin S. Vrondran | East Jordan, MI | 7 | PVGPATDIS, file of 2026-04-10 | |
| Scott B. Beal | East Jordan, MI | 3 | PVGPATDIS, file of 2026-04-10 | |
| David E. Fuller | Ellsworth, MI | 5 | PVGPATDIS, file of 2026-04-10 | |
| Dennis E. Webb | East Jordan, MI | 1 | PVGPATDIS, file of 2026-04-10 | |
| Jeremy I. Johnson | East Jordan, MI | 17 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| E02D | Foundations; excavations; embankments ; underground or underwater structures | E02D29/1463 | 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 |
|---|---|---|---|---|---|
| 2017-07-20 | Security interest Security interest Security interest | EAST JORDAN FOUNDRY, LLC signed 2017-07-19 EJ AMERICAS, LLC signed 2017-07-19 EJ ARDMORE, INC. signed 2017-07-19 EJ ASIA-PACIFIC, INC. signed 2017-07-19 EJ EUROPE, LLC signed 2017-07-19 EJ FRANCE FINANCE, LLC signed 2017-07-19 EJ GROUP DISC, INC. signed 2017-07-19 EJ GROUP, INC. signed 2017-07-19 EJ USA, INC. signed 2017-07-19 GMI COMPOSITES, INC. signed 2017-07-19 | JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT BLOOMFIELD HILLS, MI | 43053/459 | ECORSEXC, file of 2026-09-25 |
| 2011-09-20 | Assignment Assignment of assignor's interest | BEAL, SCOTT B. signed 2011-09-20 FULLER, DAVID E. signed 2011-09-20 JOHNSON, JEREMY I. signed 2011-09-20 VRONDRAN, KEVIN S. signed 2011-09-20 WEBB, DENNIS E. signed 2011-09-20 | EAST JORDAN IRON WORKS, INC. EAST JORDAN, MI | 26932/786 | 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.