Vent for enclosures
US5372543A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 1993 |
| Grant date | Dec 13, 1994 |
| Priority date | — |
| Expiry date | Apr 7, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F13/08
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A vent arrangement for enclosures that prevents the penetration of a pry bar. The vent arrangement includes a first predetermined pattern of openings of predetermined shape and dimensions provided at the exterior wall of the enclosure. The dimensions of the openings and the spacing between the openings are determined relative to the pry bar and the material in which openings are formed, such that the pry bar cannot fully enter the openings and such that the portion of the pry bar that can be applied to the openings does not cause any substantial deformation of the material surrounding the openings that could permit widening of the openings so as to allow full entry of the tip of the pry bar. In a preferred embodiment, to permit the maximum percentage area of openings within the pattern of openings while achieving the desired tamper-resistant characteristics, the first predetermined pattern of openings includes staggered rows of openings such that the openings of adjacent rows are not aligned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.