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:
Jan. 13, 2004
Filed:
Jan. 22, 2002
Etsunori Fujita, Hiroshima, JP;
Seiji Kawsaki, Hiroshima, JP;
Seiji Sesaki, Hiroshima, JP;
Tatsuya Oda, Hiroshima, JP;
Yuji Ikeda, Hiroshima, JP;
Delta Tooling Co., Ltd., Hiroshima, JP;
Abstract
An object of the present invention is to minimize the dependency of the vibration characteristic exhibited by the sheet-shaped supporting member supported by the metal springs on the added load. In a plurality of metal springs to supporting a sheet-shaped supporting member a third metal spring provided on the position to support the vicinity of the greater trochanter of the seated person is provided in a manner that an engagement portion with a frame member is positioned lower than the engagement portion with the sheet-shaped supporting member when no load is applied. Accordingly, the feeling of something foreign created by such a third metal spring can be reduced, and within a predetermined range of the added load, the third metal spring does not work functionally because respective engagement portions and take their positional relationship to be substantially horizontal in a static seating state, while it works functionally when the added load exceeds the above-described range. As a result, difference in added load can be reduced.