Mastic applicator with adjustable trowelling bar
US7318716B2 · kind B2 · utility
13Cited by
7References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 2, 2005 |
| Grant date | Jan 15, 2008 |
| Priority date | — |
| Expiry date | Oct 14, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04F21/1652
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A tool for applying mastic to drywall, having a flexible trowelling bar for smoothing and shaping the applied mastic. The curvature of the trowelling bar is controlled by the rotation of a cam that is positioned on a rigid support and that is directly coupled to the trowelling bar through a link. Springs are positioned between the rigid support and the trowelling bar to maintain tension on the link during rotation of the cam. The springs exert pressure on the trowelling bar through plungers having rounded feet that maintain consistent contact with the trowelling bar as the curvature of the trowelling bar changes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.