Hand level instrument with composite metal and plastic body
US5339530A · kind A · utility
28Cited by
4References
8Claims
0Family size
Inventor
Key dates
| Filing date | Feb 9, 1993 |
| Grant date | Aug 23, 1994 |
| Priority date | — |
| Expiry date | Feb 9, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B3/566
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A hand tool usable as a combination square having a precalibrated angle measuring vial and enhanced tensile strength, comprising a composite metal and plastic body, wherein a frame, including the working surfaces of the tool, is made from metal for precision and long-term durability, and the remainder of the body, including critical interactive portions of the tool, is made from an injection molded plastic matrix and the method of manufacture. The molded matrix is retained by frame elements providing blade support in cooperation with the frame, structure for a blade retaining means and structure for vial mounting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.