Pelvic stabilizer mechanism for a wheelchair

A system for securing a patient within a wheelchair comprising:

• a wheelchair seat;
• a trunk support mechanism mounted to said wheelchair seat having:
• a front bracket;
• a hinge piece extending from a back bracket toward the front bracket, the hinge piece having a top and a bottom, said bottom including an elongated open channel defined by first and second walls;
• a locking member rotatably mounted on said front bracket, said locking member having a lever and an elongated locking head that is configured to fit within said open channel of said hinge piece, said lever extending downwardly from said front bracket, said locking head extending forwardly;
• wherein the locking mechanism has a first, locked mode in which the locking head is situated within the open channel and in between said first and second walls, and a second, unlocked mode in which the locking head is situated outside of the open channel;
• said locking mechanism further comprising a compression spring mounted within said hinge piece and adjacent to said locking member, to maintain said locking head in said open channel when the locking mechanism is in the first, locked mode;
• and
• a releasable pelvic support mechanism mounted to said wheelchair seat having:
• a bracket comprising a generally “L”-shaped, pivoting portion and a stationary portion that is hingedly attached to said “L”-shaped portion;
• said pelvic support mechanism having a padded pelvic support mounted on said “L”-shaped, pivoting portion, said stationary portion being mounted onto said wheelchair seat;
• a release lever that is pivotally mounted on said “L”-shaped portion of said bracket;
• a sliding bolt that is mounted within said “L”-shaped portion of said bracket and which is interconnected with said release lever;
• a compression spring that is mounted in said “L”-shaped portion of said bracket and that is in contact with said sliding bolt;
• an opening in said stationary portion of said bracket for receiving the sliding bolt;
• wherein the releasable pelvic mechanism has a locked mode in which the sliding bolt is engaged with the opening in the pivoting portion of the bracket, thereby preventing the pelvic support from pivoting, and an unlocked mode in which the sliding bolt is not engaged with the opening in the pivoting portion of the bracket, thereby permitting the pelvic support to pivot.