Patents
US 11661715 B2: Manhole guard and attachable winch mount
- Granted
- 2023-05-30
- Filed
- 2020-07-30 application 16943469
- Type
- Utility · 16 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A manhole guard, methods of assembling the same, and methods of using the same, are described. The manhole guard generally includes a plurality of sections connected for movement, the sections being capable of being locked into a fixed rigid structure through the use of a first arm and second arm that act independently of each other. The manhole guard may include a safety net attached to one or more sections of the manhole guard. The manhole guard may include attachable mounting brackets designed to facilitate the attachment of a first hoist device and/or first winch and include attachable mounting members designed to facilitate the attachment of a second hoist device and/or second winch.
Source: PVGPATDIS, file of 2026-04-10 (ipg230530.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| ButlerBilt L.L.C. 3 patents | US company or organization | Flat Rock, MI | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Michael Butler | Flat Rock, MI | 5 | PVGPATDIS, file of 2026-04-10 | |
| John Lambert | Newport, MI | 4 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| E01F | Additional work, such as equipping roads or the construction of platforms, helicopter landing stages, signs, snow fences, or the like | E01F13/02 | PVGPATDIS, file of 2026-04-10 |
| B66D | Capstans; winches; tackles, e.g. pulley blocks; hoists | B66D1/04 | PVGPATDIS, file of 2026-04-10 |
| B66F | Hoisting, lifting, hauling or pushing, not otherwise provided for, e.g. devices which apply a lifting or pushing force directly to the surface of a load | B66F19/005 | 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 |
|---|---|---|---|---|---|
| 2020-08-20 | Assignment Assignment of assignor's interest | BUTLER, MICHAEL signed 2020-07-30 LAMBERT, JOHN signed 2020-07-30 | BUTLERBILT L.L.C. FLAT ROCK, MI | 53549/325 | 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.