Material or article handling – Round hay bale handling
Patent
1997-09-23
1998-11-10
Krizek, Janice L.
Material or article handling
Round hay bale handling
414912, B60P 164
Patent
active
058334246
ABSTRACT:
A hand operated hay bale lifter is of a size and weight that can be handled by one person and includes a square coupling bar that can be quickly and easily inserted into the receiver pocket of a standard tow bar trailer hitch. Mechanical lifting force produced by a hydraulic jack assembly is transferred to a fork assembly through a contact coupling provided by an open bearing cup or socket mounted on the fork assembly. The hydraulic jack assembly includes a hand pump, a hydraulic power cylinder and a piston rod mounted on an outboard support stub. The bearing cup or socket rotates in sliding engagement against the piston rod during extension and retraction. Because the piston rod and fork assembly are coupled by contact engagement only, the fork assembly can be quickly elevated by hand and locked in an upright travel/storage position.
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Griggs Dennis T.
Krizek Janice L.
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