公开(公告)号：US20050155179A1

公开(公告)日：2005-07-21

申请号：US11041330

申请日：2005-01-24

Applicant: Tom Duffy

Inventor： Tom Duffy

IPC: E05B15/00 ,  E05C17/30 ,  E05F3/10 ,  E05F3/22 ,  E05F3/04

CPC classification number: E05F3/22 ,  E05B15/0093 ,  E05C17/30 ,  E05F3/108 ,  E05F3/222 ,  E05Y2201/46 ,  E05Y2201/484 ,  E05Y2900/136 ,  Y10T16/281 ,  Y10T16/551 ,  Y10T16/593 ,  Y10T16/61 ,  Y10T16/615 ,  Y10T292/301 ,  Y10T292/394

Abstract: The present invention relates to a hold-open apparatus for controlling the position of a door, preferably a screen door or storm door. The apparatus is used in conjunction with a piston assembly and can maintain a door in a predetermined open position, such as about 45° to about 100° in relation to a closed position. In a preferred embodiment, the apparatus can automatically lock and/or unlock when the door reaches predetermined positions. The apparatus advantageously can be retrofitted to existing door assemblies.