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:
Nov. 18, 2025
Filed:
Oct. 23, 2020
Wonderland Switzerland Ag, Steinhausen, CH;
Mingxing Sun, Guangdong, CN;
Wonderland Switzerland AG, Steinhausen, CH;
Abstract
A stroller frame () includes a front leg (), a bottom tube (), a rear leg (), an upper support member () and a lower support member (). The front leg (), the bottom tube (), the lower support member () and the upper support member () are pivotally connected to each other to form a four-bar linkage structure. The rear leg () is connected to an end of the bottom tube (). A lock mechanism () is disposed at a pivot joint between the upper support member () and the lower support member (). The lock mechanism () is able to lock the upper support member () and the lower support member () at an expanded angle, such that the front leg () is able to be expanded with respect to the bottom tube (). The lock mechanism () is unlocked to release the upper support member () and the lower support member (), such that the front leg () is able to be folded with respect to the bottom tube ().