Heat transfer device having an augmented wall surface
US4402359A · kind A · utility
25Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1980 |
| Grant date | Sep 6, 1983 |
| Priority date | — |
| Expiry date | Sep 15, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28F1/422
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A heat transfer device having an augmented surface is disclosed. The device comprises a base wall of heat conductive material having a plurality of pyramid-fins formed integrally with the surface of the base wall. The pyramid-fins are regularly spaced apart in the range of about 80-500 pyramid-fins per square inch and have a height in the range of 0.015 to 0.040 inch. The base wall is preferably a cylindrical tube and the pyramid-fins are formed as a knurled diamond pattern around the outside periphery of the tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.