Apparatus and method for transporting heated pavement repair materials

• US 6,012,870 A
• Filed: 02/23/1998
• Issued: 01/11/2000
• Est. Priority Date: 02/23/1998
• Status: Expired due to Term

• Current Assignee: H.D. Industries, Inc.
• Original Assignee: H.D. Industries, Inc.
• Inventors: Dillingham, Harold W.
• Primary Examiner(s): Will, Thomas B.
• Assistant Examiner(s): Addie, Raymond W
• Application Number:
  US09/027,841
• Time in Patent Office: 687 Days
• Field of Search: 404/101, 404/72, 404/92, 404/79, 404/77
• US Class Current: 404/79
• CPC Class Codes: E01C 19/08 Apparatus for transporting and heating or melting asphalt, bitumen, tar, or the like stationarily-arranged melting boilers for tar, asphalt, or the like, in general C10C3/12
• CPC Class Codes: E01C 19/104 Mixing by means of movable members in a non-rotating mixing enclosure, e.g. stirrers E01C19/08 takes precedence
• CPC Class Codes: E01C 23/06 Devices or arrangements for working the finished surface working freshly laid paving E01C19/42 - E01C19/44, E01C23/02; mining picks E21C35/18; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road

Abstract

A portable apparatus is shown for transporting heated pavement repair materials. The apparatus has a heat chamber with an enclosed interior. A mixing chamber is contained within the enclosed interior of the heat chamber and has an inlet for receiving pavement repair materials and an outlet for discharging mixed and heated product. Either a dry radiant heat source or a liquid heat transfer source can be utilized to heat the mixing chamber. The apparatus is used to dispense a pavement repair material which is aggregate free, which does not require compaction and which is self-leveling.

Claims

1. A portable apparatus for transporting heated pavement repair materials for use in repairing roadways by applying thereto a heated asphaltic/polymeric binder material or alternatively, a traditional asphaltic repair materials

a heat chamber having an enclosed interior;

a mixing chamber contained within the enclosed interior of the heat chamber, the mixing chamber having an inlet for receiving pavement repair materials and an outlet for discharging mixed and heated product;

selectable and diverse heating sources located within the heat chamber for heating the material within the mixing chamber, the selectable and diverse heating sources including both a dry, radiant source operable for heating the material within the heat chamber to between 150°

C. and 210°

C. and a liquid heat transfer source; and

wherein the dry, radiant heat source is used to heat the asphaltic/Polymeric binder material, the liquid heat transfer source being used to heat traditional asphaltic repair materials.

2. The apparatus of claim 1, wherein the dry, radiant heat source is a burner fired retort tube located in the heat chamber and at least partly surrounding the mixing chamber.

3. The apparatus of claim 2, wherein the liquid heat transfer source is a heat transfer oil located in the heat chamber and at least partly surrounding the mixing chamber, the heat transfer oil being heated by heat transferred from the burner fired retort tube.

4. The apparatus of claim 1, further comprising:

an electric immersion heater located within the heat chamber.

5. A portable apparatus for transporting heated asphaltic/polymeric binder materials for use in repairing roadways, the apparatus comprising:

a heat chamber having an enclosed interior;

a mixing chamber contained within the enclosed interior of the heat chamber, the mixing chamber having an inlet for receiving solid asphaltic/polymeric binder materials and an outlet for discharging mixed and heated pourable material, the mixing chamber being generally cylindrically shaped and having a hydraulically powered mixing shaft centrally located therein for continuous mixing of the heated pourable material; and

a dry, radiant heat source located within the heat chamber for heating the material within the mixing chamber to between 150°

C. and 210°

C.;

wherein the dry, radiant heat source is a burner fired retort tube located in the heat chamber and at least partially surrounding the mixing chamber; and

wherein the apparatus further comprises an insulated lining surrounding the interior of the heat chamber and a metallic heat shield located within the heat chamber interior for focusing radiant heat on the mixing chamber, the shield being located below the mixing chamber and burner fired retort tube and being surrounded on an outside surface thereof by the insulated lining of the heat chamber.

6. The apparatus of claim 5, wherein the hydraulically powered mixing shaft extends along a central horizontal axis of the mixing chamber and has a plurality of mixing paddle arms which extend outwardly from the shaft generally perpendicular thereto, each paddle arm terminating in a paddle head which forms a V-shaped surface generally normal to the axis of the paddle arm.