Other

Mac LLC

James Michael McDonald

Allister T Duncan

Paul O Christianson

The present invention provides an improved harvester particularly of the type for harvesting peas. The harvester employees an improved technique of harvesting peas and similar crops. Instead of attempting to break the stem of the plant by pulling it away from the ground, which is the usual technique employed by current harvesters, the individual plants are drawn upwards then cut with a cutting bar or like device. This technique may be utilized by harvesters built specifically for this type of harvesting, or by existing harvesters after modifying the reel of the harvester, The improved harvester comprises a cutting bar, a rotary reel, a plurality of tines arranged in a plurality of rows on the reel, cam tracks and cam followers for raising the plurality of tines relative to crops in front of the cutting bar, as the reel rotates, thereby lifting the crops upwards to a position for cutting.

Pea harvester

A total counterflow heat exchanger comprising a system of partitions dividing an interior chamber into a series of channels which coincide with the path of a duct through that interior chamber. A substance at one temperature is passed through the duct, and a substance at a second temperature is passed through the channels, thereby creating a temperature differential gradient over which thermal energy is transfered from one substance to the other as the substances flow through the heat exchanger. The arrangement of the partitions permits a substance to pass back and forth through the channels in the heat exchanger along the same path as the duct, so that while the substance may flow through the heat exchanger at the same net rate as if the partitions were not present, the length of the heat exchange gradient may be increased many times, therefore enhancing the efficiency of the gradient and the heat exchanger. The particular design of this invention also permits simplified construction and servicing of an indirect fired heat exchanger, greater freedom in positioning inlet and exhaust ports, and adaptability to many diverse applications by combining a variety of different partition placements and numbers.

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Minot, ND, United States of America

James Michael McDonald