SPRING BIASED SCRAPER FOR DISK IMPLEMENTS

• US 3,833,067 A
• Filed: 10/30/1972
• Issued: 09/03/1974
• Est. Priority Date: 10/30/1972
• Status: Expired due to Term

• Current Assignee: Charles Harold Youngberg, Willard Emanual Jr. Peterson
• Original Assignee: Charles Harold Youngberg, Willard Emanual Jr. Peterson
• Inventors: Peterson, Willard Emanual Jr., Youngberg, Charles Harold
• Primary Examiner(s): Bagwill, Robert E.
• Assistant Examiner(s): Bratlie, Steven A.
• Application Number:
  US05/302,139
• Time in Patent Office: 673 Days
• Field of Search: 172/558-566,610,621,570,609,684,740,748,762,719,751,753,726 267/73-74 15/250.25,250.27 210/375 403/384,386,398,399
• US Class Current: 172/566
• CPC Class Codes: A01B 15/16 Discs bearings therefor A01B71/04; Scrapers for cleaning discs; Sharpening attachments sharpening in general B24

Abstract

Scraper apparatus for the soil engaging disks on a disk implement, the apparatus including a plurality of scraper arms, one for each disk, pivotally mounted at their upper ends on a support member for movement of their lower ends toward and away from their associated disks. The support member is adjustably mounted on the implement frame to afford common adjustment of the scraper arms radially with respect to the disks. A scraper blade is mounted on the cylindrical lower end of each arm by means of a U-shaped bracket extending through an aperture in the blade and rotatably receiving the lower end of the arm, the bracket having a pair of outwardly flanged legs engageable with the blade to limit movement of the blade radially relative to the arm, and the arm having a stop pin engageable with the edges of a circumferential slot in the bracket to limit axial movement of the blade relative to the arm. Each scraper arm includes an upper and lower spring anchor disposed above and below, respectively, the axis of the pivotal connection of the arm and support, each anchor having a plurality of spring anchor points thereon disposed at varying radial distances from the pivot axis. A spring connects the lower anchor on one of the arms with the upper anchor on the immediately adjacent arm to bias the scraper blades on the lower ends of both arms toward their respective disks, the spring being adjustable on the spring anchor points to vary the force of the blades against the disks.

Claims

1. In combination with a disk implement having a frame and at least a pair of soil-engaging disks supported thereon for rotation about a common axis, disk scraper means comprising:

a scraper arm associated with each disk and having upper and lower ends, each lower end having a cylindrical shape;

means pivotally mounting the upper end of each scraper arm on the frame for movement of the lower end thereof toward and away from its associated disk;

an upper spring anchor fixed to one of said scraper arms and disposed above the axis of the pivotal mounting of said one arm and said frame;

a lower spring anchor fixed to the other of said scraper arms and disposed below the axis of the pivotal mounting of said other scraper arm and said frame;

a spring connecting said upper and lower spring anchors and urging said anchors toward each other, said spring being operated to bias the lower ends of the scraper arms towards their respective associated disks;

a scraper blade disposed on one side of the lower end of each of said scraper arms having an edge engageable with its associated disk, said blade having an aperture formed therein;

a U-shaped bracket extending around the cylindrical lower end of each of said scraper arms and through the aperture in its associated blade and having a pair of outwardly flanged legs engageable with the side of the blade opposite that on which the scraper arm Is disposed, to limit movement of the blade radially relative to the scraper arm, each of said brackets having a slot formed therein extending circumferentially with respect to the arm; and

a pin removably received in the lower end of each of said scraper arms and extending radially into the slot and being freely movable therein upon pivotal movement of said blade engageable with the circumferentially extending edges of said slot to limit movement of the blade axially relative to the scraper arm.

2. The invention defined in claim 1 wherein said means pivotally mounting the upper end of each scraper arm on the frame for movement of the lower end thereof toward and away from its associated disk comprises:

a scraper arm support elongated in the direction of the common axis of rotation of said disks;

means pivotally mounting the upper end of each scraper arm on said scraper arm support; and

means mounting said scraper arm support on said frame for adjustment of said support relative to said frame along the axis of elongation of said support, whereby the lower ends of said scraper arms are commonly adjustable toward and away from their associated disks.

3. The invention defined in claim 1 wherein at least one of said upper and lower spring anchors includes a plurality of spring anchor points disposed at different radial distances from the axis of the pivotal mounting of the associated arm and frame, whereby the biasing force exerted on said arm by the spring means can be varied by changing the anchor point of the spring.

4. In combination with a disk implement having a frame and at least one ground engaging disk rotatably supported thereon, scraper means for said disk comprising:

a scraper arm having upper and lower ends, the lower end having a cylindrical shape;

means pivotally mounting the upper end of said arm on said frame for movement of the lower end toward and away from said disk;

a spring carried on the frame and acting on said scraper arm to bias the lower end thereof toward said disk;

a scraper blade mounted on the lower end of said scraper arm and having an edge biased toward and engageable with said disk, said blade having an aperture formed therein;

a U-shaped bracket with outwardly flanged legs extending through said aperture and rotatably receiving the cylindrical lower end of said scraper arm, the outwardly flanged legs of said bracket being engageable with one side of said scraper blade and the scraper arm being engageable with the other side of said blade, to limit movement of said blade radially relative to said scraper arm, said bracket further having a slot formed therein behind said blade, said slot extending circumferentially with respect to the arm; and

a removable pin in said scraper arm received in said slot and being freely movable therein upon pivotal movement of said blade about the arm for permitting self-positioning of the blade in accordance with the surface of its disk, said pin being engageable with the circumferentially extending edges of the slot for limiting movementof the blade lengthwise of the arm.

5. In combination with a disk implement having a frame and at least one ground-engaging disk rotatably supported thereon, scraper means for said disk comprising:

a scraper arm having upper and lower ends, the lower end having a cylindrical shape;

means pivotally mounting the upper end of said scraper arm on said frame for movement of the lower end toward and away from said disk;

a spring carried on the frame and acting on said scraper arm to bias the lower end thereof toward said disk;

a scraper blade disposed on one side of the lower end of said scraper arm and having an edge engageable with said disk, said blade having an aperture formed therein;

a U-shaped bracket extending around the cylindrical lower end of said scraper arm and through the aperture in said scraper blade and having a pair of outwardly flanged legs engageable with the side of the blade opposite that on which the scraper arm is disposed, to limit movement of the blade radially relative to the scraper arm, said bracket having a slot formed therein extending circumferentially with respect to the arm; and

a pin removably received in the lower end of said scraper arm and extending radially into said slot and being freely movable therein upon pivotal movement of said blade and engageable with the circumferentially extending edges of said slot to limit movement of the blade axially relative to the scraper arm.