Rifle handguard assembly having outer shell with outer and inner liners
US4663875A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1985 |
| Grant date | May 12, 1987 |
| Priority date | — |
| Expiry date | Dec 30, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41C23/16
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A generally round handguard assembly (10) for a rifle barrel (18) has substantially identical bottom and top mating sections (26, 28). The handguard assembly has a shell with an upper and lower row of vent holes (36) formed by two shell sections (31), an outer liner, formed by two outer liner sections (35), with upper and lower rows of vent holes (58) and an inner liner, formed by two inner liner sections (33), with upper and lower pairs of laterally opposed rows of vent holes. An outer annular volume (94), an intermediate annular volume (92) and an inner annular volume (90), which are in fluid communication, are defined within the shell by its inner periphery and the liners. Air flow in the inner volume cools the barrel and gas tube (22) and air flow in the outer and intermediate volume maintains the shell at a reasonable temperature during repeated firings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.