Chalk line dispenser
US4197656A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 27, 1978 |
| Grant date | Apr 15, 1980 |
| Priority date | — |
| Expiry date | Sep 27, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB44D3/38
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A chalk line dispenser comprising a drive casing and a replacable reel casing, which are joined to form a complete assembly. The drive casing includes a shaft and a coil spring-powered drive therefor, with a thumb-operated lever for releasing a clutch to enable spring reeling of the line. The shaft extends from the drive casing in square cross-section and is engaged by a complementary opening in the reel. The reel casing carries the reel and powdered chalk, and includes a ledge over which the chalkline passes when being reeled into the casing. A squeegee carried on the thumb operator of the clutch release presses the chalkline against the ledge to squeeze any moisture from it, causing same to drop into a moisture sump carried below the ledge. A desiccant may be carried in the moisture sump and/or may be mixed with the powdered chalk itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.