Locking valve with joint allowing packing service
US6361017B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Nov 20, 2000 |
| Grant date | Mar 26, 2002 |
| Priority date | — |
| Expiry date | Nov 20, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7065
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve for a tank containing anhydrous ammonia has a valve mechanism joined to a flow chamber from the tank. The valve mechanism has a bonnet with a hole through a sidewall of the bonnet. A stem valve portion and a stem handle portion are mounted in the bonnet. The stem valve protion is connected to the valve. The stem handle portion is connected to a handle. The handle may be raised or lowered with respect to the bonnet to selectively engage or disengage the stem handle portion from the stem valve portion. A hasp pin may be passed through the hole in the bonnet and locked in such position for preventing the handle from being lowered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.