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. 10, 1984
Filed:
Jan. 12, 1982
Shizumasa Tsukamoto, Iwata, JP;
Yoshihito Ieda, Fukuroi, JP;
Showa Manufacturing Co., Ltd., Tokyo, JP;
Abstract
A front fork assembly for use in a motorcycle or the like, in which an inner cylinder is slidably fitted in an outer cylinder is described. Either the inner cylinder or an auxiliary cylinder having a predetermined length and fitted to the inner wall of the lower portion of the inner cylinder is slidably fitted in a sheet pipe which is anchored at the bottom portion of the outer cylinder and which is equipped with an auxiliary piston at the leading end thereof. The sheet pipe has its lower portion formed with an oil port at the side thereof, whereas the sheet pipe has its upper portion formed with an orifice at the side thereof. The inner cylinder also has its lower portion formed with an oil port at the side thereof and its upper portion formed in the axial direction with one or plural orifices. In an alternative, the aforementioned cylinder is formed with a plurality of orifices at a predetermined spacing from each other and with an oil port below those orifices. By the front fork having the construction as described, the attenuating force at an extension stroke can be stepwise changed in accordance with the position of the main piston which is fitted in the leading end of the inner cylinder.