Spacer for concrete form walls
US6234447A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1998 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Dec 31, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G17/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A spacer for use in maintaining inner and outer concrete form walls at a specified uniform spacing. The spacer includes a screw shaft having a right hand threaded portion and a left hand threaded portion; a first nut threadably mounted on the left hand threaded portion; a second nut threadably mounted on the right hand threaded portion; a first spacer plate secured to and extending downwardly from the first nut; a second spacer plate secured to and extending downwardly from the second nut; and a stabilizer and stiffener assembly including a male guide structure secured to the first nut and including a rod extending generally parallel to the screw shaft and a female guide structure secured to the second nut and defining a socket telescopically receiving the free end of the rod. Turning movement of the shaft varies the axial spacing between the first and second spacer plates to establish and maintain a desired spacing between the inner and outer form walls while the telescopic receipt of the rod in the socket precludes relative rotation between the first and second nuts and further acts in coaction with the parallel shaft to stiffen the overall assembly so as to avoid buckling of the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.