The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 08, 1989
Filed:
Oct. 13, 1988
Tracy G Rogers, Rochester, NY (US);
Michael R Nier, Harrisburg, PA (US);
John Moran, Rochester, NY (US);
Schlegel Corporation, Rochester, NY (US);
Abstract
A tip-lock shoe for a window sash and the like, comprising: a hollow body adapted to slidably travel in a track; a locking member disposed in the body and movable between a retracted position enabling the body to slide freely in the track and an extended position for engaging the track and preventing movement of the body; a first lock activating member disposed in the body for engaging the window sash and for urging the locking member from the retracted position to the extended position responsive to tilting of the window sash and the like; and, a second lock activating member disposed in the body for engaging a counterbalance system for supporting the body in the track and for urging the locking member from the retracted position to the extended position independently of the first lock activating member and automatically responsive to a loss of counterbalance force, whereby the window sash and the like can be slidably and tiltably operated in normal fashion when the counterbalance system is operating properly but the window sash and the like is prevented from accidental movement when the counterbalance system fails. The second lock activating member preferably resiliently interconnects the counterbalance system and the hollow body, the second lock activating member being automatically urged into at least indirect engagement with the locking member upon failure of the counterbalance system.