ICE BREAKER ATTACHMENT FOR ROAD MAINTENANCE VEHICLES

• US 3,847,437 A
• Filed: 12/26/1973
• Issued: 11/12/1974
• Est. Priority Date: 12/26/1973
• Status: Expired due to Term

• Current Assignee: Clarence L. Williams
• Original Assignee: Clarence L. Williams
• Inventors: Williams, Clarence L.
• Primary Examiner(s): Purser, Ernest R.
• Application Number:
  US05/428,437
• Time in Patent Office: 321 Days
• Field of Search: 299/25,40 172/439,551,554,556
• US Class Current: 299/25
• CPC Class Codes: E01H 5/12 Apparatus or implements specially adapted for breaking, disintegrating, or loosening layers of ice or hard snow with or without clearing or removing E01H5/10 takes precedence; Roughening ice or hard snow by means of tools by means of gritting materials E01H10/00; roughening or breaking-up pavements E01C23/08, E01C23/12

Abstract

An ice breaker attachment for road maintenance vehicles comprises a main frame having a front rail round in cross section, means on the main frame for connecting the attachment to a road machine, a plurality of sub-frames each comprising a sleeve form front member pivotally mounted on the front rail of the main frame for rocking movement thereon, a pair of spaced apart parallel side arms connected to the front member of the sub-frame, and a spring supporting cross piece connected to the rear ends of said pair of side arms, a roller provided with annular radially extending fins rotatably mounted on and between the arms of a pair, and a coiled spring bearing on the cross piece and on the rear of the main frame. The sub-frames are independent of each other and the bearing stresses imparted to each roller when performing its intended function are uniformly distributed to the sub-frame in which the roller is mounted.

Claims

1. An ice breaker attachment for road maintenance vehicles comprising a. a main frame having a front rail, b. a plurality of sub-frames each having a tubular front member pivotally mounted on the front rail of the main frame for rocking movement thereon, a pair of spaced apart parallel side arms connected to the tubular front member, and a cross piece connecting the rear ends of the arms, c. a roller provided with annular radially extending fins, said roller being rotatably mounted on and between the side arms of a pair, and d. resilient means between the rear end of the sub-frame and the main frame exerting pressure on the sub-frame and roller mounted thereon.

2. The attachment defined by claim 1, in which the front rail of the main frame is round in cross section.

3. The attachment defined by claim 1, in which the resilient means is a coiled spring which Has its lower end mounted on the cross piece between the arms of a sub-frame, and has its upper end bearing against the main frame.

4. The attachment defined by claim 1, which includes means for attaching the main frame to a vehicle.

5. The attachment defined by claim 4, in which the means for attaching the main frame to a vehicle is a plurality of vertically adjustable hitch posts rising from the main frame.

6. The attachment defined by claim 5, in which the hitch posts have horizontally extending teeth on their upper end portions.

7. The attachment defined by claim 1, in which the fins on each roller are beveled adjacent their ice contacting edges.

8. The attachment defined by claim 1, in which each roller has a fin adjacent each of its ends and a fin midway between said ends.