Valve body
US4815705A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1987 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Nov 3, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/789
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve body made of a rubbery elastic material comprising a securing portion which is held by a securing member, and a lip portion which extends from the securing portion and which abuts against a portion to be sealed, which portion to be sealed opposes the securing member. The valve body has an annular recess formed in the base of the lip portion on the side which faces the securing portion or on the side which is opposite to a tip portion thereof. The valve body is so constituted that the gap which starts from the securing portion to the edge of the lip portion is formed on the reverse side of the lip portion when the annular recess is disposed around the lip portion on the side facing the securing portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.