Ergonomically designed seating apparatus

An ergonomically designed seating apparatus comprising:

• a seat comprising:
• a seat frame adapted to be secured to a chassis;
• a seat support pivotally connected to the seat frame such that the seat support is capable of pivotal tilting about a first transverse horizontal axis relative to the seat frame;
• at least one first resilient member positioned between the seat frame and the seat support permitting resilient relative pivotal tilting therebetween;
• and
• a backrest comprising:
• a back frame adapted to be secured to the chassis;
• a lumbar support connected to the back frame;
• a back support pivotally connected to the lumbar support such that the back support is capable of pivotal tilting about a second transverse horizontal axis relative to the back frame;
• at least one second resilient member positioned along surfaces of the lumbar support and the back support permitting resilient relative pivotal tilting therebetween;
• at least one pivot arm connected to the back support, the at least one pivot arm configured to limit the pivotal range of motion of the back support;
• and
• at least one pivot block connected to the lumbar support, the at least one pivot block configured to interact with the at least one pivot arm.

A wheelchair comprising:

• a wheelchair chassis;
• a seat comprising:
• a seat frame adapted to be secured to the wheelchair chassis;
• a seat support pivotally connected to the seat frame such that the seat support is capable of pivotal tilting about a first transverse horizontal axis relative to the seat frame;
• at least one first resilient member positioned between the seat frame and the seat support permitting resilient relative pivotal tilting therebetween;
• and
• a backrest comprising:
• a back frame adapted to be secured to the wheelchair chassis;
• a lumbar support connected to the back frame the lumbar support supporting a lumbar surface configured to support a user's lumbar region;
• a back support pivotally connected to the lumbar support such that the back support is capable of pivotal tilting about a second transverse horizontal axis relative to the back frame wherein the back support supports a back surface configured to engage the user's back region;
• at least one second resilient member positioned along surfaces of the lumbar support and the back support permitting resilient relative pivotal tilting therebetween wherein the resilient relative pivotal tilting allows the lumbar surface and back surface to tilt relative each other.