"""Twist-lock"" gas nozzle for a heat treating furnace"
US4799881A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1987 |
| Grant date | Jan 24, 1989 |
| Priority date | — |
| Expiry date | Aug 5, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D2001/005
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A re-usable and interchangeable nozzle for delivering cooling gas into the work chamber of a heat treating furnace, provided in the form of any of various keyed tube and mounting base combinations which allows assembly from within the furnace by an axial movement followed by a rotary motion. The preferred embodiment consists of a cylindrical tube made of any suitable material (including but not limited to molybdenum, graphite, or ceramic) having a keyed slot in its lower end and a matching base made of any suitable material which has a mating pin in it. The base is firmly fixed in place by welding or any suitable means and the tube can be removed from the base without damage by first rotating it then pulling it along its axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.