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US 4,688,964 AGranted
Method and apparatus for applying seal coating to asphalt pavement
OwnerHarold C. Coxinventor
Life of this patent
Estimating the term…
Abstract
A coal-tar emulsion seal coat is applied atop, spread, and pressed into an asphalt pavement by a continuous rolling technique whereby liquid sealant is carried by and released from a delivery tank extending between the sides of a frame onto the asphalt surface. A first and second set of rollers extending between the frame sides spread and smooth an even pattern of sealant, then a third, smaller, lighter roller provides a finishing and touch-up operation.
Claims9
An improved method for applying a sealant material to asphalt pavement comprising the steps of:
- (a) depositing a controlled flow of sealant material from a delivery tank operation in an elongated pattern substantially across the entire width of a prescribed strip of said asphalt pavement at a prescribed rate;
- (b) simultaneously spreading said sealant coat onto and pressing said sealant coat into the surface of said asphalt pavement solely by a first rolling operation utilizing a plurality of spaced spreading rollers without any intermediate squeegee operation which combines the characteristics of rolling and applying sufficient downward pressure to press a portion of said sealant coat into the asphalt;
- and
- (c) touching up said strip of sealant by a second rolling operation utilizing a rolling apparatus adjacent and smaller and lighter than said spreading rollers which combines further rolling while applying a relatively lighter downward pressure than is applied in said spreading step.
1 more element
Apparatus for applying a seal coat to asphalt surface comprising:
- (a) a tow vehicle having a sealant reservoir mounted thereon;
- (b) a roller support frame including a front frame member, a rear frame member, and two side frame members joined together to form said support frame;
- (c) a delivery tank extending transversely across said roller support frame between said side members adjacent the front member thereof, a conduit means connecting the sealant reservoir with said delivery tank, and a fluid outlet means for providing a controlled release of said sealant to said asphalt surface to be treated substantially across the width of said frame;
- (d) a plurality of spaced spreading rollers extending transversely across said frame rearwardly of said fluid outlet means of said delivery tank, and a support rod means extending across said frame between said side members on which said plurality of spaced rollers are pivotally mounted;
- and
- (e) a finishing roller extending across said roller frame rearwardly of said spreading rollers, a support rod means extending across said frame between said side members on which said finishing roller is pivotally mounted, said finishing roller being smaller and lighter than said spreading rollers for touching up the seal coat application.
3 more elements
Dependencies are inferred from the claim text.