EARTH WORKING IMPLEMENT LIFT ASSEMBLY

• US 3,834,465 A
• Filed: 02/05/1973
• Issued: 09/10/1974
• Est. Priority Date: 02/05/1973
• Status: Expired due to Term

• Current Assignee: Johnnie C. Collins
• Original Assignee: Johnnie C. Collins
• Inventors: Collins, Johnnie C.
• Primary Examiner(s): Pellegrino, Stephen C.
• Application Number:
  US05/329,757
• Time in Patent Office: 582 Days
• Field of Search: 172/448,197,482,491,784,785 37/117.5
• US Class Current: 172/197
• CPC Class Codes: A01B 49/02 with two or more soil-working tools of different kind
• CPC Class Codes: E02F 3/8155 provided with movable parts, e.g. cutting discs, vibrating teeth or the like

Abstract

A lift assembly for an earth working implement adapted to be attached to a tractor rear lift mechanism and having a scraper blade and scarifier means movable between extended earth engaging and retracted inoperative positions, the assembly including extensible hydraulic means and crank means pivotally connecting the scarifier means to the hydraulic means for raising and lowering said scarifier means as well as latch means for maintaining the latter in extended position, said hydraulic means being pivotally mounted to permit its limited movement and prevent damaging thereof when extended upon accidental disengagement of the latch means and upward retraction of said scarifier means.

Claims

1. In an earth working implement having a frame adapted to be attached to a tractor rear left mechanism and carrying a scraper blade for pivotal movement into and out of ground engaging position, a scarifier assembly pivotally mounted on the frame, crank means pivotally fastened to said frame and assembly for lowering and raising the scarifier assembly between earth engaging and disengaging positions, and latch means for maintaining said scarifier assembly in its earth engaging position against reactive earth applied pivoting forces, a lift assembly including hydraulic means pivotally connected to the crank means for imparting swinging movement thereto and to said scarifier assembly, and means pivotally attaching the hydraulic means to said frame so as to permit limited pivotal movement of said hydraulic means relative to said crank means and frame and prevent damaging of said hydraulic means in the event of accidental disengagement of the latch means and upward movement of said scarifier assembly relative to said means, the pivotal attaching means being pivotally connected to said frame above and in space relatioN to its pivotal fastening to said hydraulic means so as to undergo swinging movement upon pivoting of said hydraulic means.

2. A lift assembly as defined in claim 1 wherein the pivotal attaching means comprises abutment means for bearing against the frame to stabilize the hydraulic means and prevent pivoting thereof toward the crank means when the latch means is engaged.

3. In an earth working implement having a frame adapted to be attached to a tractor rear lift mechanism and carrying a scraper blade for pivotal movement into and out of ground engaging position, a scarifier assembly pivotally mounted on the frame, crank means pivotally fastened to said frame and assembly for lowering and raising the scarifier assembly between earth engaging and disengaging positions, and latch means for maintaining said scarifier assembly in its earth engaging position against relative earth applied pivoting forces, a lift assembly including hydraulic means pivotally connected to the crank means for imparting swinging movement thereto and to said scarifier assembly, and means pivotally attaching the hydraulic means to said frame so as to permit limited pivotal movement of said hydraulic means relative to said crank means and frame and prevent damaging of said hydraulic means in the event of accidental disengagement of the latch means and upward movement of said scarifier assembly relative to said means, said hydraulic means comprising a cylinder and piston with the cylinder being connected to said frame by the pivotal attaching means and the piston being connected to said crank means, said pivotal attaching means comprising a link having one end pivotally connected to said frame above said hydraulic cylinder and its opposite end pivotally fastened to said cylinder so as to undergo swinging movement upon pivoting of said cylinder.

4. A lift assembly as defined in claim 3 wherein the link has an abutment surface for bearing against the frame to stabilize the hydraulic cylinder and prevent pivoting thereof toward the crank means when the latch means is engaged.