Safety device and method
US4037516A · kind A · utility
Inventor
Key dates
| Filing date | Oct 24, 1975 |
| Grant date | Jul 26, 1977 |
| Priority date | — |
| Expiry date | Oct 24, 1995 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B31/028
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A safety device includes a shank anchored to a structure, a hollow, annular wafer mounted on and around the shank, a flowable material sealed within the wafer, and a stop member on the shank on a side of the wafer away from the structure, the wafer being constructed to yield at a predetermined pressure generated by relative movement between the structure and the stop to cause flowable material to flow from the wafer. A method of determining when a predetermined pressure is established between a structure and a stop member on a shank anchored to the structure includes the placing of a hollow, annular wafer around the shank between the structure and the stop member, and expelling from the wafer a detectable flowable material in response to the reaching of a predetermined pressure between the stop member and the structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.