Importance

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Abstract

An ergonomic seat cushion for greatly reducing and absorbing shock and isolating vibration even at high frequency ratios. An operator of heavy equipment such as construction vehicles, forklifts, dump trucks, tractors and like vehicles having poor shock absorbing systems can install the cushion on top of an existing seat. The ergonomic seat cushion serves to prevent and limit injuries through the spine, particularly the lower back and reduce neck pain, headaches and overall fatigue. The seat cushion includes a cushion cover with a visco-elastic, liquid-solid pad sandwiched between a pair of closed cell foam pads. The pads are received inside the cushion cover. The cushion cover is made of a water-resistant fabric for both indoor and outdoor use and includes straps for securing the cushion on top of the vehicle's seat. The visco-elastic, liquid-solid pad is constructed of a polyether based polyurethane material. The liquid-solid pad is designed to absorb shock forces and isolate vibration forces and direct the forces perpendicularly away from the original plane of the forces. By using the liquid-solid pad, the shock and vibration forces are reduced by approximately 80 percent. Also, the pad is designed to resist dynamic fatigue and compression set at various operating temperatures. The liquid-solid pad has a hardness in a range of 25-80 durometer and a thickness in a range of 1/4 to 1 inch. The cushion may be annular or angular in shape and may be made in different sizes depending on the seat application.

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First Claim