Curb forming machine

• US 4,013,375 A
• Filed: 06/30/1975
• Issued: 03/22/1977
• Est. Priority Date: 06/30/1975
• Status: Expired due to Term

• Current Assignee: Blaine Heaton
• Original Assignee: Blaine Heaton
• Inventors: Heaton, Blaine
• Primary Examiner(s): Byers, Nile C.
• Application Number:
  US05/591,458
• Time in Patent Office: 631 Days
• Field of Search: 404/98, 404/101, 404/105, 404/83, 404/84
• US Class Current: 404/98
• CPC Class Codes: E01C 19/4893 Apparatus designed for railless operation

Abstract

A machine for slip forming curb and gutter having a slip form with an adjustable top wall to vary the height of the curb.

Claims

1. A form movably carried for slip forming plastic concrete delivered from a well having a rear wall with an opening therein into a curb having a varying dimension between the base and head of the curb, comprising:

a pair of generally vertical side walls spaced laterally apart with respect to the direction of movement of the form and defining the vertical surfaces of the curb, the leading edges of said side walls being joined to the rear wall of said well, one on either side of said opening, the lower edge of one of said walls establishing the grade of the base of the curb;

a generally horizontal top wall extending between said vertical walls, defining the head of the curb, said top wall being movable vertically with respect to the side walls to vary the vertical dimension of the curb; and

means for sealing said top wall to the rear wall of the well above said opening.

2. The slip form of claim 1 in which the under surface of the top wall has a longitudinal downward taper from the leading end to the trailing end thereof.

3. The slip form of claim 1 in which said top wall has a sealing plate extending upwardly at the leading end thereof, adjacent the rear wall of the well, and means for holding the sealing plate against the rear wall of the well.

4. The slip form of claim 3 having a roller mounted on an eccentric cam bearing against said sealing plate to hold it in sealing engagement with the rear wall of the well.

5. The slip form of claim 3 including a resilient sealing surface between the sealing plate and the wall of the well.

7. In a machine for slip forming a concrete curb on the ground, including a movable carrier for travel across the ground, and a well on the carrier for delivering plastic concrete to a slip form in the rear of the well, the well having a rear wall at the front of the slip form, the improvement comprising:

slip form side walls spaced apart laterally with respect to the direction of carrier movement, said side walls defining the lateral surfaces of the curb and the lower edge of a side wall establishing the grade of the base of the curb, said side walls being open at the bottom to deposit concrete onto the ground;

a slip form top wall between the lateral walls defining the head of the curb;

means connected with the slip form top wall for moving the slip form top wall vertically between and with respect to the side walls to vary the vertical dimension of the formed curb and establish the grade of the head of the curb, the rear wall of said well having an opening into the slip form with a vertical dimension corresponding with the maximum height of the slip form top wall with respect to the side walls; and

a sealing plate extending upwardly from said slip form top wall adjacent the rear wall of the well to block a portion of said opening when the top wall is at a position below its maximum height.

6. The slip form of claim 7 including:

a frame member secured to said side walls, extending longitudinally of the slip form and spaced above the top wall;

a pair of hydraulic cylinders connected between the frame member and the top wall and spaced longitudinally of the top wall;

a pair of hydraulic actuator cylinders, one connected with each of said hydraulic cylinders to deliver hydraulic fluid thereto, said actuator cylinders each having a piston;

means connecting said actuator cylinder pistons together to move in unison; and

a master actuator for moving the pistons of the actuator cylinders to deliver hydraulic fluid to the hydraulic cylinders to move the top wall of the slip form up and down.