Hercules Prime US

A strong solution is needed for children, young people and adults with physical and neurological disabilities – so that they are always safe in the car.

Special Needs & Adaptive booster seat that grows with your child for years

For children, young people and adults who weigh between 40 lbs and 176.4 lbs (18.1 and 80 kg) AND whose height ist between 51.1 and 70.9" / 130 and 180 cm. Person must always be secured with vehicle's 3-point safety belt. Integrated 5-point harness provides positioning support only.

Hercules Prime US has its great performance when adaptive car seats have become too small or more support is needed when sitting in the car. As a modular positioning booster seat that grows with the user, it offers the familiar functions of our special needs car seats and can be very individually adapted with a large selection of accessories that grow with the user. When more support for the head and upper body is needed, a simple belt system in the car is not enough. For a good, safe sitting position on every journey.

Pioneer since 1988

Thomashilfen has been providing children with special needs with adapted car seats for over 30 years. Today we also use our know-how to develop our own special needs booster seats for children, young persons and adults. They incorporate all our many years of experience around the needs of users and their relatives.

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Large becomes small & handy

The adaptive booster seat can be quickly folded to a small, handy size in a few simple steps. This not only facilitates installation in the vehicle. – The positioning booster seat can also be easily transported in small car trunks and can be stowed away to save space.

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Swivel and tilting function

Tilting function up to 10° provides more seating comfort for users with weak upper body control. Swivel function facilitates transfer for users and care givers. Booster seat rotates to the right side only.

Shoulder width

Slim and broad users with a shoulder width of 42 to 51 cm / 16.5 to 20.1" sit well supported at all times. The shoulder guides (accessory) grow with the user and are infinitely variable and individually adjustable for each side - even asynchronously.

Backrest height

With the infinitely variable height adjustment of the backrest by 13 cm / 5.1", it is possible to adapt to the user's growth at any time. The head is supported in an optimal position. The large selection of accessories that grow with the user allows for a long service life.

Hercules Prime US meets the needs of children, young people and adults with following clinical pictures, who are not able to sit freely and independently: cerebral palsy, autism, hypotony syndrome of unspecific genesis, muscular dystrophy & different diseases.

Will the Hercules Prime US seat fit in my car?

Adjust the positioning booster seat when placed in the vehicle. In maximum back height there should be a distance of at least 5 cm / 2" between the top of head and the roof of the vehicle to ensure that tall users can still sit comfortably.

Always adjust the positioning seat in the vehicle that will be used later. There must be a distance of at least 95 cm / 37.4 inch from the seat to the roof of the vehicle. To ensure that tall users can still sit comfortably and do not feel crowded, we recommend a distance of approx. 110 cm / 43.3 inch.

Technical data

Hercules Prime US
Seat depth	40 - 46 cm / 15.7 - 18.1"
Depth behind crotch strap	24 - 38 cm / 9.5 - 15"
Seat width	40 cm / 15.7"
Seat to head	63 - 76 cm / 24.8 - 29.9"
Back width (seat)	45 cm / 17.7"
Shoulder height (belt guide)	38 - 60 cm / 15 - 23.6"
Shoulder width (with shoulder guide)	42 - 51 cm / 16.5 - 20.1"
Back angle (max.)	120°
Seat tilt-in-space (with tilting base 10°)	0° / 2,5° / 5° / 7,5° / 10°
Lower leg length (with foot rest))	17 - 43 cm / 6.7 - 16.9"
Height of lateral trunk supports (upper edge)	26 - 36 cm / 10.2 - 14.2"
Distance lateral trunk supports rigid	19.05 - 35 cm / 7.5 - 13.8"
Distance lateral trunk supports swing away	22.86 - 39.88 cm / 9 - 15.7"
Max. overall dimensions (w x h x d))	52 x 88 x 43 cm / 20.5 x 34.6 x 16.9"
Min. folded dimensions (w x h x d)	52 x 21 x 73 cm / 20.5 x 8.3 x 28.7"
Weight of seat (basic model)	13.4 kg / 29.5 lbs
Body height user	130 - 180 cm / 51.1 - 70.9"
User weight	18.1 - 80 kg / 40 - 176.4 lbs

Standard features:

Back with integrated height adjustment | seat with integrated seat depth adjustment | continuous back angle adjustment with quick release lever | swivel function incl. swivel lock (right vehicle door) | tilting function 10° (adjustable in steps) | breathable upholstery: head cushion, back cushion, pelvic cushion, seat cushion, crotch pad | 5-point belt including shoulder pads | upper belt guide for vehicle’s lap and shoulder belt (can be used on the right or left) | prepared mounting options for all accessories | removable covers, machine washable