Mechanism for locking two halves of an underground vault
US4333580A · kind A · utility
64Cited by
11References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1980 |
| Grant date | Jun 8, 1982 |
| Priority date | — |
| Expiry date | Sep 29, 2000 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04H9/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An underground vault formed of two housing sections, each section having an open end bordered by an outwardly projecting annular flange, the flanges being of like diameter to permit their mutual abutment when the two sections are placed together to form an enclosure, each flange having a plurality of circumferentially located, equally spaced hooks and slot configurations to lock the sections together when the sections are positioned so that alternating hooks and slots of one section are aligned with slots and hooks of the other section is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.