Traversing hoists – Adjustable to transport or nonuse position – Collapsible or foldable boom
Reexamination Certificate
2008-04-15
2008-04-15
Brahan, Thomas J (Department: 3654)
Traversing hoists
Adjustable to transport or nonuse position
Collapsible or foldable boom
C212S238000, C212S261000
Reexamination Certificate
active
11277174
ABSTRACT:
An improved boom-mounted jib unit (10) is provided having an increased range of motion and work envelope, which allows a user to lift heavier loads an otherwise work with less jib interference, as compared with prior jib units. The jib unit (10) includes a base (12) and a mounting component (28) permitting the unit (10) to be detachable secured to the upper end of a primary boom (22). The unit (10) also has a boom arm (14) made up of upper and lower arms (16, 18). The arm (14) is articulated by a dual piston and cylinder assembly (20) having first and second piston and cylinder assemblies (84, 86) coupled between the base (12) and arm (14).
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Altec Industries, Inc.
Brahan Thomas J
Hovey & Williams, LLP
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