A seat plate assembly that is secured without the use of tools or special skill to the bottom of a seat of a home or office chair that is sold disassembled. The no-tools seat plate assembly includes a seat plate housing that is connected to and slidable along the seat relative to a catch and a cam lock...http://www.google.com.au/patents/US8052218?utm_source=gb-gplus-sharePatent US8052218 - No-tools seat plate assembly with seat lift gas cylinder receiver
