Fire hydrant nozzle assembly
US4402531A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 25, 1980 |
| Grant date | Sep 6, 1983 |
| Priority date | — |
| Expiry date | Feb 25, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/1155
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fire hydrant nozzle assembly which permits a bronze fire hydrant nozzle to be readily and simply attached to a cast iron hydrant barrel without the use of lead caulking, screw threads, or other methods generally requiring machining. Un-intentional removal of the bronze nozzle as a result of the application of relatively high torque typically required to remove a protective cap is effectively prevented. To provide these features, a bronze nozzle member is retained within a hydrant boss member by means of a bayonet type or breech lock type mechanism involving cooperating lugs, and a resilient seal such as an O-ring is provided. For locking the nozzle member in its installed position, a pin element passes through a pair of corresponding apertures in confronting surfaces of the boss and nozzle members. The installed position is positively defined by respective locating engagement surfaces carried by the boss and nozzle members, which surfaces serve to limit rotation. The corresponding apertures can always be aligned even though they are pre-formed or pre-drilled. Preferably, the locating engagement surfaces are configured and positioned such that locking rotation of the nozzle follow…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.