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The trailer tongue (North America) or coupling (outside North America) slips over a trailer hitch ball attached to a receiver hitch mount or integral with the hitch. A larger, heavy-duty gooseneck ball size: 3 in (76.2 mm) is typically used for towing greater than 10,000 pounds (4.5 t), and this towing capacity falls outside of the scope of SAE ...
The automatic semi-trailer coupling patented by Fruehauf dominated the semi-trailer market until the Fruehauf Trailer Corporation's assets were sold in bankruptcy to Wabash National in 1997. Another fifth wheel patent U.S. 2,053,812 [ 9 ] was issued to Charles E. Bradshaw of Wellville, Virginia , filed March 18, 1936 and granted September 8, 1936.
Ferguson often faced the latter problem in the UK and Ireland in the 1920s and 1930s, and it also applied to the competitors' proprietary hitches of the 1940s and 1950s. In the 1960s, as patents on the technology expired, tractor and implement manufacturers agreed on the three-point hitch as the one standard, interchangeable, full-featured ...
The diagram from Beard's 1897 coupler patent [1]. Janney couplers were first patented in 1873 by Eli H. Janney (U.S. patent 138,405). [2] [3] Andrew Jackson Beard was amongst various inventors that made a multitude of improvements to the knuckle coupler; [1] Beard's patents were U.S. patent 594,059 granted 23 November 1897, which then sold for approximately $50,000, and U.S. patent 624,901 ...
Type H Tightlock couplers on a California Car cab car with separate air brake and head end power connections. Type H Tightlock couplers are a variety of Janney coupler, typically used on North American mainline passenger rail cars. They have mechanical features that reduce slack in normal operation and prevent telescoping in derailments, yet ...
The Slidingly Engaging Fastener was developed to address several problems with common hook-and-loop fasteners. [ 15 ] [ 16 ] Heavy-duty variants (such as "Dual Lock" or "Duotec") feature mushroom-shaped stems on each face of the fastener, providing an audible snap when the two faces mate.
While acceptable for mineral cars, this coupling made for an uncomfortable ride in passenger coaches, so the chain was improved by replacing the center link with a screw with a left-hand thread on one side and a right-hand thread on the other. In the center of the screw is the handle housing with a hinged ball handle attached.
Quick couplers (also called quick hitches) are used with construction machines to allow the rapid change of working tools or buckets and attachments on the machine. They remove the need to use hammers to manually drive out and insert the mounting pins for attachments.