Resilient friction sash balance
US4373295A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 12, 1980 |
| Grant date | Feb 15, 1983 |
| Priority date | — |
| Expiry date | Nov 12, 2000 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/148
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A unitary weatherstripping and self-balancing sash guide for slidingly embracing the juxtaposed side edges of a pair of double-hung inner and outer window sash units, and guiding their sliding opening and closing movement in a window opening, comprises an arched portion spanning the side edge of the window opening and having a central parting bead protruding into the window opening, inner and outer terminal flanges protruding from the arched portion into the window opening, and two slanting wing flanges respectively extending cantilever-fashion from the parting bead diagonally toward the arched portion and the respective terminal flanges, forming therewith a pair of channel-shaped grooves each embracing the side edge of one sash unit, whereby each of the two sash units is slidingly gripped in resilient tractive balancing engagement between a terminal flange and a facing slanting wing flange resiliently deformed by the embraced sash unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.