Sun Umbrella with Built-In Fan and Magnetic Clamp Shell

The problem

Large sun umbrellas provide shade for patios, pool decks and market stalls, but the canopy traps warm air underneath. On days with little wind, the shaded area remains hot and uncomfortable. Adding a separate standing fan requires floor space, a power cord and its own base, which creates tripping hazards and limits where tables and chairs can be placed. Mounting a fan permanently to the umbrella pole makes it difficult to remove the battery for charging or to store the fan during winter months.

The solution

This patent describes a sun umbrella that integrates a powered cooling unit directly into the canopy framework while keeping it easy to remove.

1. A shell (2) is mounted on an umbrella rib of the parasol (1). Inside the shell, a storage battery (3) is fixed to one side of the inner wall.
2. An air blowing mechanism (4) sits inside the shell. It includes a servo motor (41) electrically connected to the battery. The servo motor’s shaft connects to a transmission shaft (42), which turns fan blades (43).
3. Air enters through an air inlet pipe (201) connected to an air inlet disk (202) on the front side of the shell, and exits through a tapered air jet pipe (203) to direct the flow downward.
4. The shell is held in place by a half ring (8) on the rear side and a clamping rod (9). Both parts are bonded with anti-slip gaskets (10) that clamp against the outer ring of the parasol.
5. A magnetic clamp mechanism (7) allows quick detachment. It uses a first magnetite (71) and a second magnetite (72) set with the same polarity so they repel each other. The second magnetite connects to a motion bar (73), which is welded to the clamping rod.
6. A driving mechanism (75) with an articulation piece (751), hinge bar (752), drive rod (753), buoyant spheres (754), driving spring (755) and ramp blocks (74, 756) controls the motion bar. A connecting plate (5) and reset spring (11) support the assembly inside the shell cavity.

Who it is for

• Patio furniture brands looking to offer shade umbrellas with integrated cooling for residential and hospitality lines.
• Resort and hotel procurement teams that need to keep guests comfortable around pools and outdoor dining areas without adding standalone fans.
• Outdoor event rental companies supplying tents and umbrellas for weddings, markets and festivals where power outlets are scarce.
• Amazon sellers and wholesalers in the garden and outdoor category seeking a differentiated umbrella product for summer seasons.

How it works

The main parts

Operating steps

1. Mount the shell - align the half ring and clamping rod around the umbrella rib. The anti-slip gaskets grip the outer ring of the parasol to hold the shell steady.
2. Power the fan - the storage battery supplies current to the servo motor. The motor turns the transmission shaft, spinning the fan blades.
3. Direct the air - ambient air is drawn through the inlet disk and pipe, accelerated by the blades, and forced out through the tapered jet pipe toward the seating area below.
4. Remove the shell - activate the magnetic clamp mechanism. The same-polarity first and second magnetites repel, pushing the motion bar. The motion bar moves the clamping rod via the ramp blocks and driving mechanism, releasing the grip on the rib. The reset spring returns the internal parts when reassembled.

Applications

Poolside lounging

Hotel guests sit under large umbrellas near the water where breezes are often blocked by walls or landscaping. The built-in fan provides directed airflow without requiring a floor-standing unit that could be knocked over by foot traffic.

Outdoor dining patios

Restaurants use multiple umbrellas over dining tables. Integrating the fan into the canopy keeps table space clear for plates and glasses while circulating air across seated diners during warm evenings.

Market stalls and vendor booths

Sellers at open-air markets work under umbrellas for hours. A battery-powered fan removes the need to run extension cords across busy walkways, reducing trip hazards and setup time.

Backyard gardens

Homeowners relaxing in the yard benefit from shade combined with moving air. The detachable shell allows the battery to be brought indoors for charging while the umbrella remains outside.

Sporting events and bleachers

Spectators sitting in temporary shaded areas need portable cooling. The umbrella can be secured to a stand, and the self-contained fan operates independently of venue power.

Where it is less suitable

• Compact personal umbrellas - the shell and battery add weight and bulk intended for large stationary patio umbrellas, not handheld rain or travel umbrellas.
• Windy coastal areas - locations with constant strong natural winds may not require the added mechanical airflow, making the battery and motor unnecessary weight.
• Permanent architectural shade structures - fixed awnings with hardwired ventilation systems serve permanent installations better than a battery-operated attachment.