Trip beam linkage
OwnerSherman H. Quanbeckinventor
Life of this patent
Estimating the term…
Abstract
A trip beam linkage for moldboard plow or other earth working tools which trips to clear obstacles such as rocks and the like and uses a sturdy, compact and reliable folding tripping linkage which permits reliable, high clearance tripping using tension springs. The linkage lengths are selected to permit reliance on a high spring force for initial holding, which is more reliable than over center or near center trip linkages. The folding linkage is positioned so spring expansion is kept to a minimum during tripping. The linkage can be adjusted to permit aligning the earth working tool. The working position of the linkage is determined by an adjustable stop.
Claims15
A tripping beam for an earth working tool including a generally horizontal beam frame member extending fore and aft and diagonally with respect to the direction of travel of said tool, said frame member having a substantial vertical depth, and means to mount a pivoting trip beam to said frame member including a first support fixed to the lower side of said frame member and including means forming a first pivot immediately below and to the rear of said frame member, an earth working tool including a standard pivotally mounted about said first pivot and extending rearwardly and downwardly therefrom, a second support mounted to and positioned above said frame member, said second support including a mast extending upwardly from said frame member, a folding linkage including first and second links, a pivot connection pivotally mounting said first and second links together at first portions thereof, said first link having a second portion pivotally mounted to said second support and said second link having a second portion pivotally mounted to said earth working tool rearwardly of the frame member and said first pivot, said folding linkage extending rearwardly and downwardly from the pivotal mounting of said second portion of said first link to said second support to said earth working tool, and tension spring means having a first end mounted to said second support for pivotal movement about an axis above said frame member and below the pivotal mounting of the first link to the second support, and means to mount a second end of said tension spring means to said first link at a level above the lower edge of said frame member, said means to mount said second end of said tension spring means positioning the second end of said spring means rearwardly of the pivot between said first and second links and urging the pivot between said first and second links forwardly, the pivot between said first and second links remaining spaced rearwardly and above a plane defined by the axes of the pivotal mountings of said second portions of said first and second links, respectively, when the earth working tool is in a working position, the points of mounting of the tension spring means separating to elongate said tension spring means as the earth working tool moves from working position.
A trip mechanism for an earth working tool such as a moldboard plow having a frame member, a standard carrying said earth working tool, first means to pivotally mount said standard to said frame at a first pivot axis below the level of the lower edge of said frame member, a folding linkage including a first link pivotally mounted with respect to said frame at a second pivot axis positioned spaced above said first pivot and adjacent a vertical plane passing through said first pivot, and a second link having a first end pivotally mounted to said first link at a third pivot axis and a second end pivotally mounted to said standard at a fourth pivot axis, said fourth pivot axis being spaced rearwardly from said first pivot axis, said earth working tool being movable to a working position wherein the third pivot axis approaches but remains spaced from a plane defined by the second pivot axis and the fourth pivot axis, a tension spring means having a first end mounted for pivotal movement with respect to said frame, and means to mount a second end of said spring means to said first link, said means to mount a second end of said spring means including a portion of said first link which extends a substantial distance from said last mentioned plane on a side thereof opposite from the mounting of the first end of said spring means, and said spring means being at a level positioned above both the first and fourth pivot axes and below the second pivot axis, the mounting of the first end of the spring means being ahead of a second plane defined by the first and second pivot axes, whereby as said earth working tool pivots away from its earth working position about said first pivot axis in an upwardly direction, said links will fold relative to each other about the third pivot axis and said tension spring means is carried by said first link and elastically elongates, and wherein said spring means initially elongates a substantially greater amount for each degree of pivoting of said earth working tool than the amount it elongates per degree of pivoting of the earth working tool as the earth working tool moves farther away from its working position.
Dependencies are inferred from the claim text.