Although Case produced the first “integrated” Tractor Loader Backhoe in 1957 (whereby all the components were manufactured and warrantied by the same manufacturer), the invention of the first backhoe swing frame was developed in July 1947 by Vaino J. Holopainen (pronounced “Waino”) and Roy E. Handy, Jr., (thus the company name “Wain-Roy”) and assigned to Wain-Roy Corporation of Hubbardston, Massachusetts, United States. In July 1948, patent # 2,698,697 was filed by Vaino J. Holopainen. The swing frame breakthrough allowed the hydraulic digging arm to swing to the side to dump the bucket. This patent also included the invention of the out-rigger bar, and high flow control. In April 1948 Wain-Roy Corporation sold the very first all hydraulic backhoe, mounted to a Ford Model 8N tractor, to the Connecticut Light and Power Company. Wain-Roy made 24 units in 1948. Wain-Roy also made them for Sherman Products of Royal Oak, Michigan and Ford. Approximately 7000 Wain-Roy Backhoes were manufactured and sold between the fall of 1948 and early 1954, mainly through Ford dealers. Walt
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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