Land vehicles – Wheeled – Occupant propelled type
Patent
1982-01-12
1984-01-10
Peters, Jr., Joseph F.
Land vehicles
Wheeled
Occupant propelled type
188287, B62K 2508
Patent
active
044249802
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.
REFERENCES:
patent: 3989261 (1976-11-01), Kawaguchi
patent: 4015835 (1977-04-01), Schumacher et al.
patent: 4057264 (1977-11-01), Suzuki et al.
Ieda Yoshihito
Tsukamoto Shizumasa
Breiner A. W.
Peters Jr. Joseph F.
Rice Kenneth R.
Showa Manufacturing Co., Ltd.
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