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. 27, 2002
Filed:
May. 07, 2001
Dong Kwan Ma, Kyonggi-Do, KR;
Samhongsa Co., Ltd., Seoul, KR;
Abstract
A spindle base which constitutes a height regulating device of a chair, and it is an object of the present invention to improve the corrosion resistance, the abrasion resistance, the fatigue strength, and the reverse bending stress of the spindle body by coating a nitration layer of a predetermined thickness on the inner and outer surfaces of the spindle base. A height regulating device gas comprises a spindle base, a cylinder formed in the spindle base, a piston slidably moved in the cylinder, and a spindle having a piston rod having one end connected to the piston. The other end of the piston rod is fixed to one end of an outer case and the spindle is moved upward and downward through the outer case based on the piston rod and the outer case. The spindle base is comprised of a metal and nitration layers are formed on the inner and outer surface of the metal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile