Patents
US 8714867 B1: Explosion mitigating cover
- Granted
- 2014-05-06
- Filed
- 2012-12-13 application 13713754
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A manhole cover assembly configured to behave as a relief valve in an explosion event, opening so that fluid, such as air or explosive gas, may vent from an underground area. The manhole cover assembly may include a manhole cover and a frame, and may be configured to limit movement of the manhole cover with respect to the frame in response to increased pressure on the manhole cover. In one embodiment, the manhole cover may include legs having angled surfaces adapted to substantially center or guide the manhole cover in the frame while the manhole cover displaces to release pressure. In another embodiment, one or more legs may be at least one of pivotable with respect to the manhole cover and slidable within the manhole cover to enable configuring the manhole cover between a restraint mode and a removal mode.
Source: PVGPATDIS, file of 2026-04-10 (ipg140506.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| EJ USA, Inc. 9 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 | |
| Dean W. Reynolds | Elmira, MI | 5 | PVGPATDIS, file of 2026-04-10 | |
| Scott B. Beal | Pontiac, MI | 3 | 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 | E02D29/14 | 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 |
| 2012-12-13 | Assignment Assignment of assignor's interest | BEAL, SCOTT B. signed 2012-11-14 JOHNSON, JEREMY I. signed 2012-11-14 REYNOLDS, DEAN W. signed 2012-11-14 VRONDRAN, KEVIN S. signed 2012-11-30 | EJ USA, INC. EAST JORDAN, MI | 29464/531 | 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.