Snapping chalk line angles with precision
US11679620B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Aug 24, 2021 |
| Grant date | Jun 20, 2023 |
| Priority date | — |
| Expiry date | Aug 24, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB44D3/38
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A simple, economical, chalk line hook device is disclosed for marking straight lines, or lines at an angle, comprising a single unit having a front and back side, a top and bottom side wherein the top side has a gripping region which includes at least one, preferably two, gripping fangs for helping to secure the hook device to a straight edge or a corner of a surface to be marked. The hook device can be used by a single individual for marking surfaces of interest and the string can be pulled in multiple angles to provide clearly visible and precision lines for further use by contractors. The hook device is uniquely designed to contain a non-pointed notched region within the top gripping portion of the device, so that the chalk line is wrapped over the front side of the hook device, over the notch, and pulled downward against the back side of the hook device toward the lower hole of the hook device. It has been found that this inventive device can mark straight lines, or lines at an angle, from 3′ to over 30′ in length, or longer, by a single individual, and can be done with simplicity and precision.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.