Level device
US4813149A · kind A · utility
41Cited by
7References
5Claims
0Family size
Inventor
Key dates
| Filing date | Dec 1, 1987 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | Dec 1, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25H7/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A level device has an extendable body portion with a pair of pivotally mounted extendable swingers. The swingers may be adjusted to swing freely, or be locked at any desired angular position. A protractor scale on the pivot mount of each swinger provides an indication of the angle of the swinger with respect to the main body portion. A spirit level is also provided on the pivot mount of each of the swingers to allow the body portion to be held in a horizontal level position. The device is useful for hanging pictures on walls, locating shelves, drawing designs on walls and measuring operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.