Concrete plate, panel, wall or flooring demolition apparatus
US4932597A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1988 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Dec 5, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G2023/086
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
To provide a portable demolition apparatus for concrete slabs, plates or the like, a clamping arch (1) having two end portions (12, 13) is equipped with pointed bolts (15, 16; 17, 18) at the ends; at least one (16, 18) of the pointed bolts is coupled to a cylinder-piston arrangement (21) which, upon application of high hydraulic pressure in the order of for example 800 bar, drives the pointed bolt towards the other, thus cracking the concrete plate, slab or the like between the points. Hydraulic pressure is obtained from a separately located pressure source, which permits construction of the arch of lightweight material, with an overall weight of 50 kg or less, with a jaw clearance opening of 45 cm or less, application of hydraulic force being controlled by a pilot valve-control slider arrangement (23, 24) located directly on the clamping arch and coupled to the remotely located pressure source by suitable pressure hoses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.