US 3,970,405 A · Slipform paving apparatus

Abstract

A slipform paving apparatus having a variable width frame assembly supported upon independently adjustable and steerable leg and track assemblies that are positionable in a paving profile or in a travelling profile. A detachable steering cable feedback and follower assembly interconnects a track assembly on one side to the respective track assembly on the other side, providing potential single side steering control. Road building implements include in sequence and in close proximity a traversing paddle assembly, a height adjustable vibrator assembly, a variable height strike-off assembly, a vibrated grout screed assembly, a profile pan assembly, and a float pan assembly cooperating with retractable slipforming means to form a finished concrete road lane upon a substrate. The implements are modularly designed so as to be capable of being parted and increased in road width building capability by the interdisposition of extension attachments between sections of each implement.

Claims50

Dependent claims

A road building machine for forming finished grade concrete roads, comprising:

a frame assembly;
slipform means carried by the frame assembly for receiving the concrete and defining the sides of the road;
spreading means carried by the frame assembly for transversely equalizing the depth of the concrete initially received by the slipform means;
vibrator means carried by the frame assembly for vibrating and densifying the concrete being spread by the spreading means;
strike off assembly carried by the frame assembly disposed behind the vibrator means;
grout screed means carried by the frame assembly behind the strike off assembly for effecting an aggregate density gradient in the concrete;
and
profile pan means connected to the frame assembly and held in spatial relationship therefrom for molding the concrete in cooperation with the slipform means.

5 more elements

An improved road building machine of the type wherein road working implements are supported over a roadbed and caused to interwork therewith to distribute, condition and form road building material, wherein the improvement comprises:

a frame assembly supporting the road working implements comprising:
a center frame;
and
a pair of side members connected to the center frame and selectively extendible an adjustable distance from the center frame;
a forward first leg assembly connected to one of the side members for horizontal pivotation of the forward first leg assembly relative to the side member;
a forward second leg assembly connected to the other side member for horizontal pivotation of the forward second leg assembly relative to the other side member;
a forward guide track assembly having a vertically extending member pivotally connected to the forward first leg assembly, the forward guide track assembly held thereby in adjustable spatial relationship to the forward first leg assembly;
a forward follower track assembly having a vertically extending member pivotally connected to the forward second leg assembly, the forward follower track assembly held thereby in adjustable spatial relationship to the forward second leg assembly;
a rear first leg assembly connected to the side member to which the forward first leg assembly is connected, for horizontal pivotation of the rear first leg assembly relative to said side member;
a rear second leg assembly connected to the other side member for horizontal pivotation of the rear second leg assembly relative to the other side member;
a rear guide track assembly having a vertically extending member pivotally connected to the rear first leg assembly, the rear guide track assembly held thereby in adjustable spatial relationship to the rear first leg assembly;
a rear follower track assembly having a vertically extending member pivotally connected to the rear second leg assembly, the rear follower track assembly held thereby in adjustable spatial relationship to the rear second leg assembly;
and,
steering means for directing the machine along a determined path, the steering means characterized as comprising:
rear steering means guidingly connected to the rear guide track assembly and to the rear follower track assembly for guiding the machine;
and,
forward steering means guidingly connected to the forward guide track assembly and to the forward follower track assembly for guiding the machine, the forward steering means characterized as comprising:
forward first rotating ram means for rotating the forward guide track assembly;
forward second rotating ram means for rotating the forward follower track assembly;
forward first valve means connected to the forward first rotating ram means for selectively actuating the forward first rotating ram means;
forward second valve means connected to the forward rotating ram means for selectively actuating the forward second rotating ram means;
forward direction selector means connected to the forward first valve means for actuating the forward first valve means to selectively rotate the forward guide track assembly;
and,
forward cable means connecting the forward guide track assembly and the forward second valve means for actuating the forward second valve means, thereby actuating the second rotating ram means and effecting the rotation of the forward follower track assembly in response to the rotation of the forward guide track assembly.

21 more elements

Dependencies are inferred from the claim text.

Slipform paving apparatus

Life of this patent

Slipform paving apparatus

Life of this patent

Abstract

Claims50