Construction bucket

• US 7,631,446 B1
• Filed: 11/26/2008
• Issued: 12/15/2009
• Est. Priority Date: 11/26/2008
• Status: Active Grant

• Current Assignee: Davis Manufacturing, Inc.
• Original Assignee: Davis And Sons Const. LLC
• Inventors: Davis, Richard D.
• Primary Examiner(s): PEZZUTO, ROBERT ERIC
• Application Number:
  US12/324,823
• Time in Patent Office: 384 Days
• Field of Search: 37403-410, 374/44, 373/02, 379/03, 414722-724, 414/912, 172/815, 172/817, 172/787, 172/786, 172/791, 172195-199, 172/684.5
• US Class Current: 37/444
• CPC Class Codes: E02F 3/3405 and comprising an additional linkage mechanism
• CPC Class Codes: E02F 3/404 comprising two parts movable relative to each other, e.g. for gripping
• CPC Class Codes: E02F 3/962 Mounting of implements directly on tools already attached to the machine E02F3/404 and E02F3/8152 take precedence
• CPC Class Codes: E02F 9/2275 Hoses and supports therefor and protection therefor

Abstract

A construction bucket comprising a rear wall, two side walls, a bottom plate, and two side arms. Each side arm comprises a first hydraulic cylinder, a metal tube and an extension. The extension fits into the metal tube, and each side arm is positioned directly on top of one of the two side walls. An elongated blade that is attached to the extension of each side arm, and the first hydraulic cylinders extend and retract the extension within the metal tube, thereby causing the elongated blade to extend and retract. The present invention further comprises two second hydraulic cylinders, which cause the elongated blade to be raised or lowered in relation to the front edge of the bottom plate of the construction bucket.

Claims

1. A construction bucket comprising:

(a) a rear wall;

(b) two side walls;

(c) a bottom plate comprising a front edge;

(d) two side arms, each side arm comprising a first hydraulic cylinder, a metal tube and an extension, wherein the extension fits into the metal tube, wherein the metal tube is fixedly attached to a bracket that is pivotally attached to one of the two side walls at a pivot point, and wherein each side arm is positioned directly on top of one of the two side walls; and

(e) an elongated blade that is attached to the extension of each side arm;

wherein the first hydraulic cylinders cause the extension to extend and retract within the metal tube, thereby causing the elongated blade to extend and retract in relation to the pivot point.

2. The construction bucket of claim 1, further comprising two second hydraulic cylinders;

wherein each side arm comprises two brackets that lie on either side of the metal tube;

wherein the brackets on either side of the metal tube are pivotally attached to one of the two side walls to form a pivot point; and

wherein each second hydraulic cylinder is situated behind the rear wall and is connected to the two brackets that lie on either side of the metal tube such that when the second hydraulic cylinder extends and retracts, the side arm pivots at the pivot point, thereby causing the elongated blade to be raised or lowered in relation to the front edge of the bottom plate of the construction bucket.

3. The construction bucket of claim 2, wherein the elongated blade has a height, and the height of the elongated blade is such that when the side arms are fully lowered in relation to the front edge of the bottom plate of the construction bucket, the elongated blade extends beneath the bottom plate.

4. The construction bucket of claim 1, further comprising two cushion valves, wherein each cushion valve is located behind the rear wall adjacent to one of the second hydraulic cylinders, wherein hydraulic hoses for the first and second hydraulic cylinders emanate from the two cushion valves, and wherein the cushion valves provide a cushioning effect for the first and second hydraulic cylinders.

5. The construction bucket of claim 1, further comprising a rock rake attachment;

wherein the rock rake attachment comprises a lateral beam, a plurality of vertical teeth, and two insertion members that extend perpendicularly from the lateral beam; and

wherein to fit the rock rake attachment onto the bucket, the two insertion members of the rock rake attachment are inserted into the extensions of the side arms and bolted in place.