Folding implement frame
First Claim
1. A folding implement frame, comprising:
- a tongue frame having a forward end and a rearward end arranged along a longitudinal central reference line;
an elongated boom frame having an inward end mounted to the tongue frame for movement about a first pivot axis, and an outward end remote from the tongue frame;
a boom pull bar having an outward end pivotably mounted to the boom frame on a second pivot and an inward end adapted to be connected to the tongue frame;
a strut linkage having a first end mounted to the tongue frame for pivotal motion thereon about a third pivot axis, and a second end mounted to the boom pull bar for pivotal motion thereon;
wherein the boom frame is movable about the first pivot axis, and the boom pull bar and strut linkage pivot with the boom frame between a narrow roadway towing position in which the boom frame, the boom pull bar and the strut linkage are all substantially parallel to the central longitudinal reference line, and an outward operative position in which the boom frame is extending substantially laterally in relation to the central reference line; and
wherein the strut linkage means includes a lost motion link means for enabling adjustment of the length of the strut linkage to accommodate pivotal motion of the boom pull bar with the boom frame about the first axis between the operative and towing positions with the strut linkage remaining connected to the boom pull bar and tongue frame during such motion.
2 Assignments
0 Petitions
Accused Products
Abstract
A folding implement frame includes a central tongue frame and a pair of elongated boom frames mounted to the tongue frame for movement about first pivot axes. The boom frames are movable about the first pivot axes between towing positions extending behind the tongue frame in a narrow roadway travel configurations, and outward operative positions extending substantially laterally of the tongue frame. Rigid boom pull bars have outward ends pivotably mounted to the boom frames on second pivots and inward ends mounted to strut linkages. The strut linkages are mounted to the tongue frame for pivotal motion thereon about third pivot axes, and to the boom pull bars for pivotal motion thereon. The strut linkages also include provisions for enabling adjustment of the length of the strut linkage to enable pivotal motion of the boom pull bars and boom frames between the operative and towing positions. The strut linkages remain connected to the boom pull bars and tongue frame during such motion. Selectively operated castor wheel assemblies and operating controls are provided to enable selective motion of the boom frames to and from the towing and operative positions without requiring manual manipulation thereof.
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Citations
10 Claims
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1. A folding implement frame, comprising:
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a tongue frame having a forward end and a rearward end arranged along a longitudinal central reference line; an elongated boom frame having an inward end mounted to the tongue frame for movement about a first pivot axis, and an outward end remote from the tongue frame; a boom pull bar having an outward end pivotably mounted to the boom frame on a second pivot and an inward end adapted to be connected to the tongue frame; a strut linkage having a first end mounted to the tongue frame for pivotal motion thereon about a third pivot axis, and a second end mounted to the boom pull bar for pivotal motion thereon; wherein the boom frame is movable about the first pivot axis, and the boom pull bar and strut linkage pivot with the boom frame between a narrow roadway towing position in which the boom frame, the boom pull bar and the strut linkage are all substantially parallel to the central longitudinal reference line, and an outward operative position in which the boom frame is extending substantially laterally in relation to the central reference line; and wherein the strut linkage means includes a lost motion link means for enabling adjustment of the length of the strut linkage to accommodate pivotal motion of the boom pull bar with the boom frame about the first axis between the operative and towing positions with the strut linkage remaining connected to the boom pull bar and tongue frame during such motion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification