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US 2012/0141195 A1Published application
Folding chair safety lock
AssigneeAtico International USA, Inc.
InventorsMing Chin Lu, Guo Biao Qiu, Shang Jen Liu, Tung Yang Chen
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Abstract
The present invention relates to devices for safely locking collapsible furniture in a fixed configuration. In particular, the present invention provides locks for collapsible furniture which are automatically engaged and require multiple affirmative steps to unlock.
Claims19
A locking device comprising:
- a first mechanism, wherein said first mechanism has a locked conformation and an unlocked conformation;
- a second mechanism, wherein said second mechanism has a locked conformation and an unlocked conformation;
- a locking mechanism, wherein said locking mechanism has a locked conformation and an unlocked conformation;
- and a support engagement element, wherein said support engagement element attaches said locking device to a support element;
- wherein said locked conformation of said locking mechanism impedes movement of said locking device along said support element, wherein said locked conformation of second mechanism impedes unlocking of said locking mechanism, and wherein said locked conformation of first mechanism impedes unlocking of said second mechanism;
- wherein unlocking of said first mechanism allows unlocking of said second mechanism, wherein unlocking of said second mechanism unlocks said locking mechanism, and wherein unlocking of said locking mechanism allows movement of said locking device along said support element;
- and
- wherein said first mechanism must be unlocked prior to unlocking said second mechanism, wherein said second mechanism results in unlocking said unlocking mechanism, and wherein said unlocking mechanism, must be unlocked prior to movement of said locking device along said support element.
5 more elements
Dependencies are inferred from the claim text.