Front fork for motorcycle or the like
US4424980A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1982 |
| Grant date | Jan 10, 1984 |
| Priority date | — |
| Expiry date | Jan 12, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/48
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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 inn…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.