Apparatus for applying liquid surface sealer

• US 4,725,163 A
• Filed: 04/07/1986
• Issued: 02/16/1988
• Est. Priority Date: 04/07/1986
• Status: Expired due to Term

• Current Assignee: North Shore Company
• Original Assignee: North Shore Company
• Inventors: Phillips, Emil
• Primary Examiner(s): Friedman, Carl D.
• Application Number:
  US06/848,500
• Time in Patent Office: 680 Days
• Field of Search: 404/108, 404/110, 404/111, 404/101
• US Class Current: 404/101
• CPC Class Codes: E01C 19/16 for applying or spreading liquid materials, e.g. bitumen slurries E01C19/1054, E01C19/21, E01C19/45, E01C19/4813, E01C21/00, E01C23/02, E01C23/03, E01C23/065, E01C23/096, E01C23/0973, E01C23/0993 , E01C23/16 take precedence; spreading-out or smoothing-down means as parts of spraying apparatus E01C19/178

Abstract

An apparatus for spreading and leveling liquid surface coatings used to seal bituminous surfaces. The apparatus includes the combination of a mobile hopper assembly for storing and dispensing the viscous coating material at a controlled rate in the form of globules or droplets along the path of travel of the hopper. The globules or droplets are spread and smoothed into a thin continuous coating by means of a spreading and leveling attachment pivotally connected to and adapted to be towed behind the hopper. The spreading and leveling attachment has a frame that carries flexible resilient spreading and smoothing blades. The spreading blade is mounted on the frame closely spaced from the surface to be coated and is adapted to spread and flatten the globules and droplets on the surface in both longitudinal and lateral directions. The smoothing blade is mounted behind the spreading blade and is engageable with the surface to smooth the viscous liquid into a thin and continuous coating.

Claims

1. Apparatus for spreading and leveling liquid surface coatings on a generally level surface including in combination:

a mobile hopper for dispensing at a controlled rate a viscous coating liquid along the path of travel of the hopper in the form of globules and droplets, and

a spreading and leveling attachment pivotally connected to and adapted to be towed by said hopper, said attachment comprising;

a frame;

a flexible resilient spreading blade mounted on said frame closely spaced from the surface to be coated and having a pair of arms angularly disposed relative to one another and intersecting to define an apex at approximately the centerline of said path of travel, said apex extending toward the direction of travel and said arms defining an angle bisected by said centerline whereby said arms spread and flatten said globules and droplets on said surface in both longitudinal and laterally outward directions in a band over a portion of the surface to be coated; and

a flexible resilient smoothing blade mounted on said frame and spaced rearwardly from said spreading blade relative to said path of travel and having a width greater than the span defined by said arms, said smoothing blade being engageable with said surface to smooth said viscous liquid that has been spread and flattened by said spreading blade into a thin continuous coating that is greater in width than the span between the outer ends of said spreading blade.

2. Apparatus as defined in claim 1, wherein said spreading blade and said smoothing blade are formed of an elastomeric material.

3. Apparatus as defined in claim 1, wherein said length portions define an angle of intersection of about 120°

C.