Adjustable door and window security prop
US4300796A · kind A · utility
Inventor
Key dates
| Filing date | Nov 29, 1979 |
| Grant date | Nov 17, 1981 |
| Priority date | — |
| Expiry date | Nov 29, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/67
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
First and second elongated large and small diameter tubular members rotatably and telescopically engaged with each other are provided. The first and second members include exposed remote ends with one of the remote ends including a terminal end structure adapted to frictionally engage a floor surface and the other remote end includes a terminal end adapted to engage the shank portion of the doorknob. The large diameter elongated member is provided with a pair of diametrically opposite parallel outwardly opening first slots formed therein and the small diameter elongated member is provided with longitudinally spaced pairs of corresponding second slots with which the first pair of slots are selectively registrable. The adjacent marginal edges of the legs of a U-shaped lock structure are receivable through the first slots and in the pair of second slots with which the first slots are registered for releasably locking the large and small diameter members against relative rotation and relative longitudinal shifting. The lock structure is anchored to the exterior of the large diameter tubular member through the utilization of an elongated flexible tether member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.