Lock for casement windows
US4610472A · kind A · utility
41Cited by
13References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 3, 1982 |
| Grant date | Sep 9, 1986 |
| Priority date | — |
| Expiry date | Nov 3, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/1041
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An improved casement window securement mechanism includes two cams, one handle, cam linkage and a cam and linkage supporting spacer. The spacer supported cam is a reaching cam including a cam ramp with a straight drawing portion, and cam center and over-center portions. The reaching cam draws a catch at a rate varying with the cam angle of rotation. The securement mechanism draws and positively secures a bowed or warped casement sash.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.