Resilient fastener washer
US11446071B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2020 |
| Grant date | Sep 20, 2022 |
| Priority date | — |
| Expiry date | Jan 20, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/681
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A resilient washer has a one-piece washer body. The washer body has a central opening, an upper fastener interfacing section or bowl, a lower structure interfacing section or bowl and a resilient middle portion. The resilient middle portion connects the upper fastener interfacing section or bowl and the lower structure interfacing section or bowl. The resilient middle portion is configured to be locally collapsed when a fastener in the central opening is tightened into a structure. In one embodiment, the upper fastener interfacing section or bowl is annular, wherein the upper fastener interfacing section or bowl has a concavity for holding a head of the fastener. The concavity can be of a hemispherical shape. Preferably, the concavity has a smooth surface to allow polyaxial movement of a fastener.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.