Patent ID: 8720988

Claim:
A chair frame comprising: first, second, third and fourth support members each comprising a seat end and a telescopic end, the telescopic end configured to alter the length of the support members, in which the first, second, third and fourth support members together are configured to maintain the seat in an upright position when the telescopic end of each of the first, second, third and fourth members are extended; a hub coupled to the first support member through a first coupling, the hub coupled to the second support member through a second coupling, the hub coupled to the third support member through a third coupling, and the hub coupled to the fourth support member through a fourth coupling, in which the hub is coupled to each of the first, second, third and fourth support members through a respective rod between the hub and each of the first, second, third and fourth support members; and an additional hub coupled to the first support member through a fifth coupling, the additional hub coupled to the second support member through a sixth coupling, the additional hub coupled to the third support member through a seventh coupling, and the additional hub coupled to the fourth support member through an eighth coupling, in which the additional hub is coupled to each of the first, second, third and fourth support members through an additional respective rod between the additional hub and each of the first, second, third and fourth support members, in which the hub and the additional hub are separate and not coupled to each other.