Window lock
US4095827A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1976 |
| Grant date | Jun 20, 1978 |
| Priority date | — |
| Expiry date | Dec 23, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/0915
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A window lock and, more particularly, a check rail lock which can be mounted in association with a double hung window having a center vertical muntin. The window lock has a casing housing a linearly movable locking unit with locking members having a locking notch at one end for engagement with catch means carried by the adjacent window sash, an operating unit with operating members movably mounted in the casing and movable between window unlocked and locked positions and with pin and slot structure interconnecting the locking members and the operating members with the casing whereby the locking members are guided in the linear movement thereof to an advanced position as the operating unit moves toward the locked position and the locking members are then raised into engagement with the catch means and withdrawn to tightly draw and lock the window sash together as the operating unit moves to the final locked position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.