Patents
US 11855521 B2: Brushless DC motor for a body-grip power tool
- Granted
- 2023-12-26
- Filed
- 2022-02-01 application 17590011
- Type
- Utility · 22 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A power tool is provided including a housing including a grip portion; and a brushless direct-current (BLDC) motor at least partially disposed within the grip portion of the housing. The motor includes a stator having a rotor core, a rotor, and front and rear bearing support structures. The stator core includes a non-segmented construction with a maximum diameter of approximately smaller than or equal to 34 mm, and a ratio of a motor size (Km) constant of the motor to a length of the motor is in the range of approximately 0.39 to 0.59 (Nmm/√W)/mm. When powered by a 20 V battery pack, a ratio of a maximum power output of the motor to a volume of the motor is at least approximately 0.0106 W/mm{circumflex over ( )}3.
Source: PVGPATDIS, file of 2026-04-10 (ipg231226.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| BLACK & DECKER INC. 2,415 patents | US company or organization | Meridian Avenue, CT | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Dustin Jefferies | Baltimore, MD | 10 | PVGPATDIS, file of 2026-04-10 | |
| David J. Smith | Columbia, MD | 123 | PVGPATDIS, file of 2026-04-10 | |
| Marcus E. E. Rydin | Baltimore, MD | 8 | PVGPATDIS, file of 2026-04-10 | |
| Justin H. Ayers | Jarrettsville, MD | 28 | PVGPATDIS, file of 2026-04-10 | |
| Sumiteru Mori | Baltimore, MD | 7 | PVGPATDIS, file of 2026-04-10 | |
| John B. Fogle | White Hall, MD | 18 | PVGPATDIS, file of 2026-04-10 | |
| John D. Cox | Timonium, MD | 42 | PVGPATDIS, file of 2026-04-10 | |
| Kristopher Cochran | Middle River, MD | 5 | PVGPATDIS, file of 2026-04-10 | |
| Barak N. Gohn | Shrewsbury, PA | 14 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| H02K | Dynamo-electric machines | H02K1/185 | PVGPATDIS, file of 2026-04-10 |
| B24B | Machines, devices, or processes for grinding or polishing ; dressing or conditioning of abrading surfaces; feeding of grinding, polishing, or lapping agents | B24B23/028 | PVGPATDIS, file of 2026-04-10 |
| F16C | Shafts; flexible shafts; elements or crankshaft mechanisms; rotary bodies other than gearing elements; bearings | F16C17/02 | PVGPATDIS, file of 2026-04-10 |
| B25F | Combination or multi-purpose tools not otherwise provided for; details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for | B25F5/001 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
No recorded assignments or security interests on file for this patent.
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.