Mobile chair for panoramic dental x-ray machine

Claim 1

For use with a panoramic oral radiography apparatus including arm means rotatable about a vertical axis and film holder means supported on said arm means on one side of said axis and an x-ray source supported on said arm means on the other side of said axis for said film holder means and said source to orbit about a space for accommodating the head of a radiographic examination subject in a radiographic active position; a chair that is adapted for being locked normally in a first position such that an examination subject seated on said chair will be located substantially in said radiographic active position and which chair is removable so that a wheel chair may be situated in its place, said chair comprising: seat means and support means including leg means supporting said seat means and roller means supporting said leg means for enabling said chair to be moved on the floor adjacent said apparatus, one of said chair and said apparatus having first means for being engaged and disengaged, and one of said chair and said apparatus having second means for alternately engaging and disengaging said first means, such that when said means are engaged said chair will be located in correspondence with said radiographic active position and when said means are disengaged said chair may be moved as a unit on said roller means to and from other positions, said means for supporting said seat means comprising vertically disposed post means having an upper end on which said seat is supported and having a lower end, means for clamping said lower end of said post means to said support means such that a portion of said post means is exposed, means that are fixed proximate to the floor beneath said arm means, said means having a recess that is substantially complementary in shape to said exposed portion of said post means for receiving said post means, selectively operable means for locking said means for clamping and said fixed means together when said exposed portion of said post means is in said recess of said fixed means.