Cushion pad that reduces compressive stress and tensile stress
US10035440B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2015 |
| Grant date | Jul 31, 2018 |
| Priority date | — |
| Expiry date | Jul 19, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47C27/15
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
[Problem]To provide a cushion pad that reduces the wobbling feeling.[Solution]Regarding the test piece sampled from a core portion, the measured deflection under a load of 100 N during compression is equal to or less than 30 mm. The measured static spring constant under a load of 300 N at a pulling rate of 20 mm/minute is equal to or less than 25 N/mm. In the case of a vibration input in a low frequency band in the lateral direction, the compressive stress in the vertical direction due to the weight of a seated person and the tensile stress due to the vibration input in the lateral direction act on the support portion. The direction (gradient) of the resultant force as a combination of the compressive stress and the tensile stress can be closer to the vertical direction. This allows reducing the wobbling feeling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.