Gate valve with locking handles
US4944484A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 26, 1989 |
| Grant date | Jul 31, 1990 |
| Priority date | — |
| Expiry date | Jun 26, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K3/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A gate valve is provided which includes a body having exterior catches and a handle with resilient latches integrally formed with the valve stem to snap lock over the catches on the body when the valve is closed. The gate valve closes and locks simultaneously to cut off flow through a passage by a single axial motion and is unlocked to open the valve by rotational motion. Further, when the resilient latches snap over the catches, the operator hears an audible snap thereby assuring the operator that the valve is securely locked in the closed position. The gate valve body is preferably formed by ultrasonic welding of two identical half members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.