Shutter assembly using a resilient material
US5428436A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1994 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | Jul 26, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0685
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is disclosed a shutter assembly including: (a) a surface defining a surface opening; (b) a housing associated with the surface which defines a passageway in communication with the surface opening, wherein the housing surface defining the passageway includes a housing hole; and (c) a resilient material defining an end surface, which is disposed in the passageway and covers the housing hole, wherein the size of the end surface permits the application of an external force against the end surface to compress the resilient material to uncover the housing hole, and whereby the resilient material spontaneously expands to cover the housing hole when the external force ends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.