Patent · US Active

Devices and methods of making hollow concrete elements

US8465687B2 · kind B2 · utility

2Cited by

7References

7Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventor

Peter Häger · Djursholm, SE

Key dates

Filing date	Oct 8, 2008
Grant date	Jun 18, 2013
Priority date	—
Expiry date	Jan 2, 2029

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB28B21/245
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Devices and methods for making hollow concrete elements are disclosed. A device includes a drum mold having a tubular mold wall. The mold wall has a first and a second end flange each with an inner periphery smaller than the inner periphery of the mold wall at each respective end. The device further includes a compaction roller positionable inside the mold wall. The compaction roller has a profile that defines the interior shape of the concrete element. The compaction roller is supported by a hydraulically height adjustable supporting mechanism that is operable to independently adjust the distance of each end of the compaction roller with respect to the inner periphery of the mold wall.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.