# US 6,164,873 A · Double-wing deformable stop-end pipe for forming the joining surfaces of concrete-cast wall elements

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- Number: US 6,164,873 A
- Document ID: US6164873A
- Status: Granted
- Kind: A
- Application number: 09/140,685
- Filed: 1998-08-26
- Granted: 2000-12-26
- Earliest claimed: 1997-09-12
- Assignees: Finic, B.V.
- Inventors: Giosue' Miotti; Marco Miotti
- Web page: https://patentgrep.com/patent/US6164873A

## CPC

- E02D 5/185: {with flexible joint members between sections (joints in foundation structures E02D29/16; flexible joints in hydraulic engineering E02B3/16, in building E04B1/68)}
- E02D: FOUNDATIONS; EXCAVATIONS; EMBANKMENTS (specially adapted for hydraulic engineering E02B); UNDERGROUND OR UNDERWATER STRUCTURES {(tunnels, tunnelling, mining E21)}

## Abstract

A stop-end pipe is used for formation of joining surfaces between adjacent wall elements made from a concrete casting, of the type consisting of a substantially trapezium-shaped profiled section divided up into at least two wings these wings are resiliently approachable to one another and also have a double internal reinforcing partition able to prevent collapsing as a result of compression. Preferably, the double partition is partially widened out so as to form a guide channel in which a guiding pawl for a working tool is able to slide.

## Claims

### Claim 1

A stop-end pipe for formation of joining surfaces between adjacent wall elements made from concrete cast inside excavations, comprising a profiled section of substantially trapezoidal shape having at least two wings, said wings being resiliently deformable by approaching one towards the other.

### Claim 2 (depends on 1)

The stop-end pipe as recited in claim 1, further comprising at least an internal double reinforcing longitudinal partition.

### Claim 3 (depends on 2)

The stop-end pipe as recited in claim 2, in which said wings are in the form of two closed shells joined by a deformable common wall.

### Claim 4 (depends on 3)

The stop-end pipe as recited in claim 3, in which said double partition forms part of the two closed shells.

### Claim 5 (depends on 4)

The stop-end pipe as recited in claim 4, in wihch the two closed shells are able to approach one another by rotating about a hinging zone situated in correspondence with the deformable common wall.

### Claim 6 (depends on 5)

The stop-end pipe as recited in claim 5, in which said double partition partially widens out, in correspondence with a larger base of said profiled section, to form a guide channel in which a guiding pawl of a working tool is insertable.

### Claim 7 (depends on 6)

The stop-end pipe as recited in claim 6, in which said double partition partially widens out, in correspondence with the deformable common wall, to form a Y-shaped structure having edges which are joined to the deformable common wall.

### Claim 8 (depends on 6)

The stop-end pipe as recited in claim 6, further comprising a protective board of breakable material applied onto the larger base of said profiled section.

### Claim 9 (depends on 6)

The stop-end pipe as recited in claim 6, further comprising a box-shaped formwork, wider than the profiled section, applied removably onto the larger base of said profiled section.

### Claim 10 (depends on 6)

The stop-end pipe as recited in claim 6, in which a breakable disposable tube is housed inside the guide channel.

### Claim 11 (depends on 4)

The stop-end pipe as recited in claim 4, further comprising a removable formwork with a retractor tool to be inserted between the two closed shells.

### Claim 12 (depends on 1)

The stop-end pipe as recited in claim 1, in which said profiled section has, associated with one of the adjacent wall elements made from concrete, a seating for provisionally retaining sealing strips for water-tightness of a joining surface with the concrete.