Abstract: A mechanized crutch having vertically adjustable leg rest and body bracket, a wide tread wheel, a drive belt, gearing and a drive wheel are mounted on an elongated leg means. The leg rest and body bracket provide body support. The drive belt, gearing and drive wheel are arranged on the elongated leg means to transmit locomotive power from the drive wheel to the wide tread wheel mounted on the bottom of the elongated leg means. The drive wheel, which may be manual or battery powered, is located within reach of the user's hand on the side of his injured leg. Stabilization is provided by front and rear outrigger tubing having small wheels which roll on the walking surface.

Abstract: A ventilating, cooling, and heat reclaiming system for use with cooking equipment such as commercial ranges and grills whereby grease laden exhaust air passes through a grease filter or extractor and then past a cooling coil through which water is circulated so as to improve grease removal and reclaim heat from exhaust air to heat outdoor supply air. The heated water from the coil is supplied to a further coil disposed in the path of outdoor supply air via a three way valve having two outlets and a mixing valve. The mixing valve varies temperature of water in the further coil to maintain constant the temperature of the supply air and water not supplied to the further coil is supplied to a hot water generator by the three way valve.

Abstract: Ventilating and cooling apparatus for cooking equipment heated by gas, oil, steam or electricity that reclaims radiant heat generated by cooking equipment by heat transfer panels through which cold water is circulated and preheated for use in hot water generating system or other system which can make use of preheated water. Heat transfer panels are positioned between the back edge of the canopy and the top of the cooking equipment and on the interior face of the canopy to collect radiant heat emitted directly and indirectly from the cooking equipment surfaces. An air passage behind the back panels serves to preheat incoming ventilation make-up air which is directed down, under and up along the front of the cooking equipment forming an air curtain and extracting heat from the body of the cooking equipment that is otherwise radiated to cooler bodies in close proximity to the heating surface.