Curb and gutter sled with pivoting mold assembly

• US 7,377,719 B1
• Filed: 12/06/2005
• Issued: 05/27/2008
• Est. Priority Date: 04/18/2005
• Status: Active Grant

• Current Assignee: Northern Nevada Concrete, Inc.
• Original Assignee: Northern Nevada Concrete, Inc.
• Inventors: Hall, Tim, Elizondo, David D., Friberg, C. Ed
• Primary Examiner(s): Will; Thomas B
• Assistant Examiner(s): Schiller; Alina
• Application Number:
  US11/296,770
• Time in Patent Office: 903 Days
• Field of Search: 404/98, 404/96, 404/97, 404/105, 404/110
• US Class Current: 404/98
• CPC Class Codes: E01C 19/4893 Apparatus designed for railless operation

Abstract

A slipform sled for paving street curbs and gutters has a hopper and a curb and gutter mold. A pivoting mold assembly having a standard curb elevation mold and a driveway curb elevation mold is mounted on the slipform sled. The pivoting mold assembly pivots on a shaft oriented parallel to the direction of motion of the slipform sled. Paving material is flowed into the hopper and is extruded through the standard curb mold or the driveway curb mold while the sled is moving providing a smooth uniform finish. Only the relatively small transition section between the standard curb and driveway curb needs hand finishing. The elevation of a vibrator in the hopper is changed to correspond to the elevation of the curb extruded.

Claims

1. An apparatus for extruding a continuous curb comprising:

a slipform sled;

a hopper coupled to said slipform sled;

wherein said hopper is adapted to receive a flowable paving material;

a pivoting mold coupled to said slipform sled;

wherein said pivoting mold is fluidly connected to said hopper;

wherein said pivoting mold has a first position and a second position;

wherein when said pivoting mold is in said first position, a curb of a first profile is extruded;

wherein when said pivoting mold is in said second position, a curb of a second profile is extruded;

wherein said pivoting mold is adapted to change from said first position to said second position when said slipform sled is in motion and flowable paving material is flowing from said hopper to said pivoting mold; and

wherein said pivoting mold pivots on an axis parallel to the direction of motion of said slipform sled.

2. An apparatus as recited in claim 1, wherein said pivoting mold pivots by means of a hydraulic actuator.

3. An apparatus as recited in claim 1, further comprising:

a shaft supporting said pivoting mold and coupled to said slipform sled;

wherein said shaft is oriented parallel to the direction of motion of said slipform sled.

4. An apparatus as recited in claim 3, further comprising:

a hydraulic actuator coupled to said slipform sled and further coupled to said shaft;

wherein said hydraulic actuator moves said pivoting mold between said first position and said second position.

5. An apparatus as recited in claim 1, further comprising:

a vibrator positioned in said hopper;

wherein said vibrator is adapted to vibrate flowable paving material;

wherein said vibrator has a first position and a second position;

wherein said first position of said vibrator corresponds to a curb of said first profile; and

wherein said second position of said vibrator corresponds to a curb of said second profile.

6. An apparatus as recited in claim 5, further comprising:

a shaft supporting said pivoting mold and coupled to said slipform sled;

wherein said shaft is oriented parallel to the direction of motion of said slipform sled.

7. An apparatus as recited in claim 6, further comprising:

a first hydraulic actuator coupled to said shaft;

wherein said first hydraulic actuator moves said pivoting mold between said first and second positions; and

a second hydraulic actuator coupled to said vibrator;

wherein said second hydraulic actuator moves said vibrator between said first and second positions.

8. An apparatus for extruding a continuous curb comprising:

a slipform sled;

a hopper coupled to said slipform sled;

wherein said hopper is adapted to receive a flowable paving material;

means for forming a curb coupled to said slipform sled;

wherein said means for forming a curb is fluidly connected to said hopper;

wherein flowable paving material flows from said hopper into said means for forming a curb when said slipform sled is in motion;

wherein said means for forming a curb has a first position and a second position;

wherein when said means for forming a curb is in said first position, a curb of a first profile is extruded;

wherein when said means for forming a curb is in said second position, a curb of a second profile is extruded;

wherein said means for forming a curb is adapted to change between said first position and said second position when said slipform sled is in motion;

a pivoting mold coupled to said slipform sled;

a shaft supporting said pivoting mold and coupled to said slipform sled;

wherein said pivoting mold rotates on said shaft; and

wherein said shaft is oriented parallel to the direction of motion of said slipform sled.

9. An apparatus as recited in claim 8, further comprising:

a hydraulic cylinder having a base and an actuator;

said hydraulic cylinder base coupled to said slipform sled;

said hydraulic cylinder actuator coupled to said shaft;

wherein said hydraulic cylinder is used to change said pivoting mold between said first position and said second position.

10. An apparatus as recited in claim 8, further comprising:

a vibrator positioned in said hopper;

said vibrator adapted to vibrate flowable paving material;

wherein said vibrator has a first position and a second position;

wherein said first position of said vibrator corresponds to a curb of said first profile; and

wherein said second position of said vibrator corresponds to a curb of said second profile.

11. An apparatus as recited in claim 8, wherein said means for forming a curb comprises:

a front and rear plate;

wherein said front, rear plates are shaped as a wedge having a vertex and an arcuate outer edge opposite said vertex;

an aperture positioned in said vertex of said front, rear plates;

a shaft coupled to said slipform sled;

wherein said front, rear plates are mounted on said shaft through said apertures;

wherein said front, rear plates are aligned on a common plane perpendicular to said shaft;

said outer edge of said front, rear plates having left and right sections;

a first cutout positioned in said left section of said outer edge of said front, rear plates;

a first curb slipform mounted between said front and rear plates and extending from said first cutout in said front plate to said first cutout in said rear plate;

wherein said first curb slipform corresponds to a curb of said first profile;

a second cutout positioned in said right section of said outer edge of said front, rear plates;

a second curb slipform mounted between said front and rear plates and extending from said second cutout in said front plate to said second cutout in said rear plate;

wherein said second curb slipform corresponds to a curb of said second profile; and

wherein said first and second curb slipforms are oriented parallel to said shaft.

12. An apparatus as recited in claim 11, further comprising:

a middle plate positioned between said front and said rear plates;

wherein said middle plate is mounted on said shaft on a plane perpendicular to said shaft; and

wherein said middle plate is coupled to said first and second curb slipforms.

13. An apparatus as recited in claim 11, further comprising:

a front wear plate coupled to said front plate; and

a rear wear plate coupled to said rear plate.

14. In an apparatus for forming an extruded curb consisting of a slipform sled and a hopper adapted to receive a flowable paving material, the improvement comprising:

a pivoting mold coupled to said slipform sled;

wherein said pivoting mold is fluidly coupled to said hopper;

wherein said pivoting mold is adapted to form an extruded curb;

wherein flowable paving material flows from said hopper into said pivoting mold when said slipform sled is in motion;

wherein said pivoting mold has a first position and a second position;

wherein when said pivoting mold is in said first position, a curb of a first profile is extruded;

wherein when said pivoting mold is in said second position, a curb of a second profile is extruded;

wherein said pivoting mold is adapted to change from said first position to said second position when said slipform sled is in motion; and

wherein said pivoting mold is adapted to rotate on an axis parallel to the direction of motion of said slipform sled.

15. In an apparatus as recited in claim 14, the improvement further comprising:

a shaft supporting said pivoting mold and coupled to said slipform sled;

wherein said shaft is oriented parallel to the direction of motion of said slipform sled.

16. In an apparatus as recited in claim 15, the improvement further comprising:

a hydraulic actuator coupled to said slipform sled and further coupled to said shaft;

wherein said hydraulic actuator moves said pivoting mold between said first position and said second position.

17. In an apparatus as recited in claim 14, the improvement further comprising:

a vibrator positioned in said hopper;

said vibrator adapted to vibrate flowable paving material;

wherein said vibrator has a first position and a second position;

wherein said first position of said vibrator corresponds to a curb of said first profile; and

wherein said second position of said vibrator corresponds to a curb of said second profile.