Interior door security
US4281865A · kind A · utility
Inventor
Key dates
| Filing date | Nov 16, 1979 |
| Grant date | Aug 4, 1981 |
| Priority date | — |
| Expiry date | Nov 16, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/228
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An interior door knob security cinch loop comprising, a rectangular shaped plate bent at appointed and spaced apart relationship to form a vertical back with a top and base horizontal extensions wherein, said top has a triangularly shaped eyelet extending upward from said top and open vertically of said horizontal top. The base extension extends beyond said top extension slightly and has its forward edge diagonally planed inward to form a chisel edge and the inner said base has a predetermined number of inwardly punched out, triangularly shaped, grip points facing the vertical back of said plate. A wire of high tensile strength is threaded through the aforesaid eyelet and the ends of said wire are secured together to form an extended loop. A metal plate formed in the shape of a vertical rectangle which is inwardly open and having a retainer shaft extending from said rectangular side horizontally to house an anchor hook and/or a combination anchor device which uses a circular elastic loop. A dual door knob anchor loop, dual anchor hooks and/or dual combination anchor devices and dual elastic loops.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.