Window counterbalance system
US9309709B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2014 |
| Grant date | Apr 12, 2016 |
| Priority date | — |
| Expiry date | Mar 17, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05D15/22
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A window balance assembly for a tilt-in window comprising a bracket, a spring and a carrier. The first spring has a first portion engaging the bracket. The carrier has a vertical portion including a first slot, a first projection extending outwardly from a first side of the vertical portion, and a second attachment projection extending outwardly from a second side of the vertical portion. The first slot receives a pivot bar of the tilt-in window via a vertical drop-in installation. One of the first and second attachment protrusions engages the first portion of the spring. The horizontal portion includes an aperture rotatably engaging a cam between a first position and a second position. The cam has a second slot aligned with the first slot when the cam is in the first position allowing for the pivot bar to move between the first slot and the second slot.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.