Material or article handling – Vertically swinging load support – Shovel or fork type
Patent
1997-10-31
1999-10-19
Underwood, Donald W.
Material or article handling
Vertically swinging load support
Shovel or fork type
414687, B66F 900
Patent
active
059677376
ABSTRACT:
A backhoe boom lock for locking the boom to the swing frame during transporting and craning operations. The boom is provided with two upwardly open hooks that project on either side of the swing frame when the boom is retracted into its craning or transport positions. Two bell cranks are located on each side of the swing frame and are provided with transverse catches for engaging the upwardly open hooks. The bell cranks are biased downwardly by springs. A linkage for lifting the bell cranks against the biasing force of the springs extends from the bell cranks into the interior of the operator's cab. The linkage is provided with a control lever, located inside the operator's cab for lifting the bell cranks. After the boom has been retracted into its transport or craning position, the control lever is released and the bell cranks rotated by the biasing springs so that the catches engage the upwardly open hooks on the boom.
REFERENCES:
patent: 4225282 (1980-09-01), Nordstrom et al.
patent: 4260321 (1981-04-01), Beauchamp et al.
patent: 4278394 (1981-07-01), Johnson
patent: 4887938 (1989-12-01), Menke
patent: 5064339 (1991-11-01), Ahlers
Dressler Robert Paul
Kieffer Michael John
Kraske Leroy Ernest
Mootz Robert Gerard
Schaal Dennis Alan
Deere & Company
Underwood Donald W.
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