Abstract: A container reinforcement that comprises a pair of interlockable members, at least one of which is movable with respect to the other. The interlockable members have cooperable lock portions that interfit with one another and can be used to manually, removably attach the reinforcement to a container. A container using such a reinforcement.

Abstract: An energy-saving system for reclaiming the waste water contained in the ice shavings obtained from resurface ice at an ice skating rink, the system including a first tank for holding the ice shavings, a second tank for storing the waste water from the melted ice shavings, a first conduit system for conveying waste water from the melted shavings in the first tank to the second tank, a second conduit system for conveying waste water from the second tank to be sprayed on the shavings in the first tank, and a solar heating system for supplying heated waste water to the second tank.

Abstract: A closed circuit heating system which is capable of extracting either "high" grade (solar) heat or "low" grade (non-solar) heat from the surrounding atmosphere and then using it to heat air, water, etc., includes a first (external) heat exchanger in the form of a solar panel for heating a volatile fluid passing therethrough which is located outdoors so as to absorb both direct solar energy (when the sun is shining) and non-solar energy, a compressor, a second (internal) heat exchanger which is connected to heat air, water or some other fluid, and an expansion valve. A volatile fluid medium is circulated through the fluid flow conduits connecting the various elements.