Secondary lock for sliding door or window
US4061372A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 5, 1976 |
| Grant date | Dec 6, 1977 |
| Priority date | — |
| Expiry date | Apr 5, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/1089
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A sliding vent, such as a door or window, is slidable in a plane parallel to a fixed vent having a bottom rail of channel construction including a vertical panel adjacent the path of the sliding vent. A rectangular opening is cut through the panel into which is inserted and snap-fitted a housing having two parallel vertical walls extending into the interior of the fixed bottom rail. A stop plate is pivoted on the bottom edge of the opening and is rockable between an unlocked position in which the sliding vent clears the stop plate and a lock position in which the sliding vent is prevented from further movement by abutment of the bumper stile of the sliding door or window against the stop plate. In the lock position, a spring biased pin protudes from the stop plate and abuts the fixed bottom rail, thus preventing the stop plate from being moved to unlocked position. The stop plate is selectively moved to the unlocked position by pushing the pin into the stop plate until the pin clears the housing walls and then pivoting the stop plate into the housing until clearance is afforded between the sliding vent and the fixed vent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.