Pneumatic shut-off valve
US4526341A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 1983 |
| Grant date | Jul 2, 1985 |
| Priority date | — |
| Expiry date | Jun 15, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K51/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve body includes a chamber for the flow of fluid between an inlet and an outlet thereto. The chamber includes an upper portion with an opening therethrough and a lower portion including a valve seat between the inlet and outlet. A bonnet is positioned in the chamber upper portion and is connected to the valve body and extends upwardly therefrom. The bonnet includes a passageway, and a stem is positioned in the passageway for longitudinal movement into and out of sealing relation with the valve seat. An air operator is connected to the upper end of the stem and is connected to a source of fluid under pressure, such as compressed air, which is supplied by remote control to the air operator to control reciprocation of the stem to open and close the valve. The air operator includes a base connected to the bonnet in surrounding relation with the stem and positioned in spaced relation with a piston connected to the upper end of the stem to thereby form a fluid chamber. A housing encloses the piston and the base. Pressurized air is admitted and released to and from the chamber for reciprocating the piston to open and close the valve. A compression spring acts on the stem to normally …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.