Ergonomic seating assembly system with front chest support component, pelvic tilt seat component and related attachments

A method of supporting the body of a person in a seated position with the upper body of the person oriented in a near vertical but forwardly tilted orientation, the method comprising the steps of:

• a. supporting the person's buttocks for sliding movement in fore and aft directions on seat means mounted for sliding movement in a plane generally transverse to the person's upper body;
• and
• b. supporting the person's chest by a peripherally unencumbered support platform, with said platform being supported in a stable position near vertical but forwardly tilted position permitting relaxation of the person's back muscles while seated on said seat means and permitting fore and aft adjustment of said seat means while the person's upper body is supported by said platform.

A method of supporting a person while seated comprising the steps of:

• a. positioning under the person's buttocks a supporting platform;
• and
• b. supporting said platform for movement along an upwardly curved path having a center of curvature proximate the axis of rotation of the pelvis of the person seated on said platform, said supporting step further including supporting said platform for sliding movement along said path while the person's weight is supported on said platform.

An ergonomic chair including a frame, a torso support platform mounted to the frame in a stable position and dimensioned and shaped to engage and support a portion of the user's torso primarily in the area of the rib cage and having a peripheral edge shaped to facilitate unimpeded arm movement, a seat mounted to said frame and formed and dimensioned for support of the user's buttocks thereon, wherein the improvement in said chair comprises:

• said seat is mounted to said frame inclined in a direction tilting said seat toward said torso support platform, and
• said torso support platform is mounted to said frame to provide torso support in a plane substantially normal to the plane of said seat whereby said torso support platform can be used to support the chest of the user when the user is seated on said seat and facing said torso support platform and can be used to support the back of the user when the user is seated on said seat and facing away from said torso support platform.