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Concept
Bender Machine Works
Summary
The Bender Machine Works in Hayward, Wisconsin, is a dairy equipment manufacturer that played a major role in the history of the dairy farming business in the United States from the 1950s to the 1980s, producing milk pipeline and milk transfer cart components, and washing/vacuum-releasing equipment.
The company continues to be in business but now focuses its manufacturing on private label electromechanical milk pipeline washing systems.
The Bender Washer/Releaser was a vacuum-operated device first invented and patented by Lloyd Bender of Hayward, WI, USA in the 1950s, used to both wash dairy milking equipment and to transfer milk from piping containing a vacuum, into a storage tank at normal atmospheric pressure.
As a non-electric pneumatically operated device, the washer/releaser could be used on small dairy farms without electricity that used an engine to supply milking vacuum, and used well water to cool milk.
The Washer/Releaser could be used in association with both dairy pipelines and the Step-Saver, a milk transfer cart used with bucket milkers. The Step-Saver and the Washer/Releaser were once extremely common in the 1960s to 1980s on small family dairy farms in the United States, to reduce the labor of bucket milking before the milk pipeline became more popular.
(Expanded topic section from Dairy farming article.)
As barns began to increase in size from perhaps 6 to 12 cows to 30 or 40 cows, the bucket milker became a very laborious milking system. As the barn length increased, the farmer had to walk an increasing distance from the cow to the milk bulk tank to dump the collected milk. An early vacuum milk-transport system known as the Step-Saver was developed to save the farmer the trouble of carrying the heavy steel buckets of milk all the way back to the storage tank in the milkhouse. The system used a very long vacuum hose coiled around a receiver cart, and connected to a vacuum-breaker device in the milkhouse.
Following milking each cow, the bucket milker would be dumped into the receiver cart.
Official source
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