Patent · US Active

Window sash latch

US8336930B2 · kind B2 · utility

21Cited by

29References

46Claims

0Family size

Assignee

VISION INDUSTRIES GROUP, INC. · US

Inventors

Luke Liang · South Plainfield, US
Tong Liang · 流花街道, CN
David Chen · 流花街道, CN

Key dates

Filing date	Jan 4, 2007
Grant date	Dec 25, 2012
Priority date	—
Expiry date	Jan 4, 2027

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T292/1077
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

An improved window sash latch which has a locking mechanism and a keeper is provided with a handle that rotates from a “locked” to an “unlocked” position. An inner cavity of the handle has a spring assembly having a sliding part that can be forced into a detent as the handle slides around a cylindrical extension of an outer surface of the latch. The detents correspond to a “locked” and an “unlocked” position of the latch. The latch also provides two cams where both cams revolve relative to each other; one cam is activated by the handle through the handle's shaft, the other cam engages the keeper, and both cams engage each other.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.