One-way valve for use with vacuum pump
US6634384B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 2003 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | Jan 17, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7881
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A valve assembly mounted in a resealable/reclosable storage bag. The valve assembly includes a base and a valve element. The valve element includes a stem with a convex cap attached at one end and a valve gate attached at the opposite end. The stem extends into a hole in the base. The resilient quality of the cap, acting against the top of the base, holds the gate against the bottom of the base, thereby forming a seal between the gate and the base that is strong enough to preserve the vacuum inside the bag. A cavity extends into the stem from the cap end. A hole in the stem runs from the cavity to outside the stem. When the stem is pressed down, a vacuum source may draw air between the gate and the base, through the hole in the stem, into the cavity, and subsequently outside the bag.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.