Tiltable box scraper for three-point attachment to a tractor

• US 4,337,833 A
• Filed: 12/08/1980
• Issued: 07/06/1982
• Est. Priority Date: 12/08/1980
• Status: Expired due to Term

• Current Assignee: Rafael J. Welch
• Original Assignee: Rafael J. Welch
• Inventors: Welch, Rafael J.
• Primary Examiner(s): Johnson, Richard J.
• Application Number:
  US06/213,995
• Time in Patent Office: 575 Days
• Field of Search: 172/799.5, 172/445.1, 172/445.2, 172/684.5, 172/787, 172/316, 172/459, 172/224, 172/460, 172/225, 172/666, 172/679, 172/743, 172/448, 172/449, 172/779, 172/780, 37/118 R, 37/124, 37/126 R
• US Class Current: 172/445.1
• CPC Class Codes: E02F 3/7631 with the scraper blade adjustable relative to the frame about a horizontal axis

Abstract

An improved tiltable box scraper for attachment to a standard three-point hitch at the rear of a farm tractor or the like. The box scraper characterized by having a single hydraulic cylinder mounted thereon for tilting the scraper in opposite directions independently of the position of the tractor on the ground surface.

Claims

1. An improved tiltable box scraper for attaching to a standard three-point hitch at the rear of a farm tractor or the like, the scraper comprising:

a scraper housing having a moldboard with a cutting blade attached at an angle to the bottom of the moldboard and a pair of vertical end plates, the opposite ends of the moldboard attached to the rear of the end plates;

a lateral support brace, parallel to the moldboard, the opposite ends of the support brace attached to the front of end plates;

a pipe sleeve, one end of the sleeve attached to and centered on the support brace, the other end attached to and centered on the moldboard;

a rectangular shaped housing support, the support having a horizontal lower pivot bar, a horizontal upper bar, a first vertical bar attached to one end of the upper bar and one end of the pivot bar and a second vertical bar attached to the other end of the upper bar and the other end of the pivot bar, the pivot bar slidably received through the pipe sleeve;

pivot means attached at one end to the support brace and the other end attached to the upper bar for pivoting the housing on the pivot bar; and

attachment means secured to the first vertical bar for releasably attaching the scraper to the three-point hitch.

2. An improved tiltable box scraper for attaching to a standard three-point hitch at the rear of a farm tractor or the like, the scraper comprising:

a scraper housing having a moldboard with a cutting blade attached at an angle to the bottom of the moldboard and a pair of vertical end plates, the opposite ends of the moldboard attached to the rear of the end plates;

a lateral support brace, parallel to the moldboard, the opposite ends of the support brace attached to the front of the end plates;

a pipe sleeve, one end of the sleeve attached to and centered on the support brace, the other end attached to and centered on the moldboard;

a housing support having a lower pivot bar, an upper bar, a first upright bar attached at one end to the upper bar and having a second portion attached to the pivot bar, and a second upright bar attached to the other end of the upper bar and the pivot bar, the pivot bar slidably received through the pipe sleeve;

pivot means attached at one end to the support brace and the other end attached to the upper bar for pivoting the housing on the pivot bar; and

attachment means secured to the first upright bar for releasably attaching the scraper to the three-point hitch.

3. The scraper as described in claim 2 wherein the pivot means is a hydraulic cylinder, one end of the cylinder attached to the support brace, the cylinder hydraulic ram attached to the housing support.