Drop-in unit, grid insert therefor and method of making same
US5375820A · kind A · utility
4Cited by
4References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 19, 1993 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | May 19, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F3/04
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A drop-in spring assembly unit and method of manufacture of furniture. The assembly unit includes a plurality of spring elements coupled together by unique individual grid inserts, a wire base that may be customized to customer specifications and a border wire surrounding the top perimeter of the unit. The grid inserts are assembled prior to assembly of the drop-in unit and are coupled to spring elements by cushion clips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.