{
  "patent_number": "US 12734871",
  "country": "US",
  "title": "How a Sealed Electric Motor Stays Cool Inside",
  "original_title": "Sealed motor with internal cooling features",
  "summary": "This patent describes a brushless direct-current (BLDC) motor sealed in an airtight compartment that uses openings in its spinning rotor to create an internal airflow, cooling the motor by transferring heat to the end caps.",
  "what_it_does": "This electric power apparatus features a brushless direct-current (BLDC) motor supported by a main planar body. The motor's stator and rotor are enclosed within a substantially airtight sealed compartment, formed by a first end cap and a second end cap. Crucially, the rotor includes a series of openings in its radial wall. As the rotor spins, these openings generate an airflow that circulates within the sealed compartment, effectively transferring heat from the stator to both the first and second end caps, which then dissipate the heat.",
  "what_it_does_not_cover": [
    "Does not cover electric motors that are not brushless direct-current (BLDC) motors.",
    "Does not cover motors where the stator and rotor are not enclosed in a substantially airtight sealed compartment.",
    "Does not cover cooling systems that do not generate airflow using openings in the rotor's radial wall.",
    "Does not cover motors where heat is primarily transferred to components other than the first and second end caps.",
    "Does not cover motors that rely on external fans or liquid cooling systems for primary heat removal."
  ],
  "filed": "2023-08-22",
  "granted": "2026-09-15",
  "expires": null,
  "status": "active",
  "holder": null,
  "holder_url": null,
  "inventors": [],
  "times_cited": 0,
  "tags": [
    "mechanical",
    "consumer_electronics",
    "automotive",
    "aerospace",
    "robotics",
    "telecommunications"
  ],
  "abstract": "An electric power apparatus includes a main planar body having a circular opening that supports a brushless direct-current (BLDC) motor. The motor includes a stator, a rotor, a motor spindle extending through the circular opening, a first end cap formed on a first side of the stator and mounted on the main planar body; and a second end cap formed on a second side of the stator and secured to the first end cap to form a substantially airtight sealed compartment around the stator and the rotor. The rotor includes a series of openings in a radial wall that generates an airflow circulating through the sealed compartment to transfer heat from the stator to the first end cap and the second end cap.",
  "url": "https://patentbrief.org/patent/us/12734871/sealed-motor-with-internal-cooling-features",
  "markdown_url": "https://patentbrief.org/patent/us/12734871/sealed-motor-with-internal-cooling-features/md",
  "google_patents_url": "https://patents.google.com/patent/US12734871",
  "relatedPatents": []
}