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Leo Heikkinen in 1960. Leo Leonard Heikkinen (June 11, 1917 – September 10, 1999) [1] was an American entrepreneur and millionaire who founded and owned numerous forestry production companies in Prentice, Wisconsin, including Prentice Hydraulics, Inc. (now a division of Caterpillar, Inc.) [2] and Multitek North America, LLC. [1]
The swing yarder is also known as a grapple yarder. In any logging operation, it is necessary to transport the harvested tree from the stump to a landing for transport to market (usually on a truck). If the ground is relatively flat it may be possible to transport the tree or logs cut from the tree on a wheeled or tracked machine.
A yarder is piece of logging equipment that uses a system of cables to pull or fly logs from the stump to a collection point. [1] It generally consists of an engine, drums, and spar, but has a range of configurations and variations, such as the swing yarder.
The winch or grapple holds the trees while the skidder drags them to a landing area. Cable skidders are more labor-intensive than grapple skidders because someone (the operator or a second person) must drag the winch line out to the logs and hook them up manually. Nowadays, cable skidders are less popular than in the past.
A grapple truck is a truck that has a grapple loader mounted to its frame which is used for loading and sometimes hauling bulky waste. Grapple trucks are commonly used by municipal sanitation or public works departments, and by waste collection companies. Grapple trucks can also sometimes be used in road construction and repair. There are six ...
A grapple is a hook or claw used to catch or hold something. A ship's anchor is a type of grapple, especially the "grapnel" anchor.. A soldier loading a hook. A throwing grapple, kaginawa (or "grappling hook" ) is a multi-pronged hook that is tied to a rope and thrown/launched to catch a grip, as on a parapet or branch of a tree. [1]