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. 04, 1998
Filed:
May. 21, 1997
Tianfu Li, Dearborn Hts., MI (US);
Other;
Abstract
A walker to assist physically impaired persons in ascending and descending stairs, has two rear legs pivotally attached to two front legs. When the walker is in use, the rear legs are locked against any pivotal movement; when stairs are to be negotiated, a locking member is released to permit relative pivotal movement of the rear legs in respect to the front legs. Thus, the front and rear legs can be placed on the staircase. After this has been done, the legs again are locked into position. The walker maintains this relative position so that the person using it may negotiate the stairs. The locking member is in the form of a toothed substantially circular gear and spring biased bolt.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile