Handheld constant-stiffness ring shear apparatus and method for using same
US10168263B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 2016 |
| Grant date | Jan 1, 2019 |
| Priority date | — |
| Expiry date | Mar 30, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L1/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A handheld constant-stiffness ring shear apparatus has a base and an annular rigid frame arranged on the base in a sleeved mode. An upper cover is buckled to the top of the rigid frame, a pressure transmission plate is fixed to the upper portion of the upper cover, and a rotary shaft is perpendicularly arranged in the center of the base. The rotary shaft penetrates through the pressure transmission plate and is fixed to the pressure transmission plate. A spanner is fixed to the top end of the rotary shaft, and a digital display instrument is embedded in the spanner. The handheld constant-stiffness ring shear apparatus is convenient to carry, easy to operate, economical and practical, and can be used for measuring the volume chance of a soil sample at a field location under the constant-stiffness condition in the shear force resisting and shearing process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.