Tilt lock for double-hung windows
US5301989A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1993 |
| Grant date | Apr 12, 1994 |
| Priority date | — |
| Expiry date | Mar 9, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/62
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A latch for selectively connecting a sash of a double-hung window to a slide track in a window frame, including a lever including a gear at one end, a latch housing mountable to the sash, the housing including means for pivotally supporting the lever, and a locking member movable between a locked position securing the sash to the track and an unlocked position releasing the sash from the track. The locking member includes a tongue projecting from the latch housing when the tilt latch is in the locked position and lying within the latch housing when the tilt latch is in the unlocked position, and a rack engaging the lever gear to move the locking member to locked and unlocked positions in response to pivoting of the lever. The lever gear includes a disk formed along one side, and the locking member includes a channel along the rack receiving the disk during pivoting of the lever. A stop is secured to the latch housing, which stop engages the locking member to prevent overpivoting of the lever arm when the lever arm is moved into the unlocked position. A detent is provided including first and second spaced grooves on one of the lower housing and the locking member and a protuberance …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.