Swivel arm concrete placer
US4262696A · kind A · utility
16Cited by
9References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 15, 1980 |
| Grant date | Apr 21, 1981 |
| Priority date | — |
| Expiry date | Jan 15, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8807
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A concrete placing boom device includes a rail-mounted base, extensible outriggers and a jointed two-section cantilevered arm structure that supports a jointed two-section pipeline. Preferably, the inner arm section is pivotally mounted on the base for rotation about a vertical axis and the outer arm section is pivotally mounted on the inner arm section for rotation and angular elevation. The device is joined with pins for assembly and disassembly for easy transport.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.