Apparatus for measuring the hardness properties of materials
US4435976A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 28, 1981 |
| Grant date | Mar 13, 1984 |
| Priority date | — |
| Expiry date | Dec 28, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N3/44
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for measuring the hardness properties of materials may comprise: a frame for supporting the apparatus and the material to be tested; a test head assembly mounted on the frame for applying predetermined measuring forces to the material and a clamp assembly mounted on the frame for supporting the material and for applying a clamping force to clamp the material against the tester head assembly prior to application of the predetermined measuring forces. The tester head assembly may include a housing; a penetrator assembly carried by the housing, including an axially reciprocal penetrator shaft at the lower end of which is a ball member for contact with the material; an operating assembly for applying a first predetermined force and a second and greater predetermined force to the penetrator shaft for indentation of the material by the ball member, and indicating devices for measuring the difference of indentations of the material by the first and second predetermined forces. A load cell may be attached to the penetrator shaft for measuring the first and second predetermined forces, for controlling the operating assembly by which the first and second predetermined forces are ap…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.