Temperature sensitive control valve
US5109881A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 23, 1990 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Aug 23, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/1987
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A temperature sensitive valve having a body with an internal valve chamber being open through said body, an inlet extending into the valve chamber, a control outlet communicating with said valve chamber, and a bleed outlet communicating with said valve chamber, a bonnet having a bore secured to said body in surrounding relationship to the opening of the valve chamber through the body, a control sleeve positioned in said valve chamber and in said bonnet bore, means for sealing between the control sleeve and the interior of the valve chamber above and below the entry of said inlet into the valve chamber, said control sleeve defining a first valve seat in its lower portion, a second valve seat surrounding the entrance of the bleed outlet into said valve chamber, a valve member extending through said valve sleeve and having valve seat engaging surfaces for engaging said first and second valve seats, a first temperature sensitive material supporting said valve member in position out of engagement with said first valve seat, a second temperature sensitive material supporting said control sleeve in a first position and allowing it to move to a second position when exposed to temperature a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.