Abstract: A clot preventing invalid chair and attachments is disclosed in which a box-like single, open top foot enclosure is utilized to support both feet of a seated person. The enclosure attaches to the front and back chair legs in such a manner that it may be adjustable in both the horizontal and vertical planes and also pivot at the ankle to provide maximum comfort and adaptability. The box shoe structure prevents the patient's body from sliding forward and out of the chair, and also enables the patient's legs to be raised to prevent blood clots from forming, a condition prevalent in immobilized geriatric patients.One embodiment contemplates telescoping braces to allow retraction of the foot rest and a second embodiment combines both the telescoping brace with a pivoting brace to permit the foot enclosure to be retracted and stored under the chair seat.

Abstract: A braking system for ski or float equipped aircraft which is actuated by the conventional brake system of the aircraft. The system permits normal braking operation to activate the additional components which have been added to the ski or float of the airplane. A braking member actuated by a hydraulic cylinder connected to the aircraft's original hydraulic system form the main components of this invention.