Checker brick
US4940081A · kind A · utility
17Cited by
7References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1989 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Jul 31, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S165/03
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A checker brick has a plurality of walls intersecting at a plurality of spaced intersections. Four walls extend outwardly from each intersection in equidistantly-spaced relationship to one another. One of the four walls at each intersection is a common wall that extends between adjacent intersections. The other three walls at each intersection are independent walls. Mating projections and recesses are provided on the opposite surfaces of the brick at the intersections for interlocking bricks stacked in tiers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.