Land vehicles – Wheeled – Attachment
Reexamination Certificate
2008-01-29
2008-01-29
Dickson, Paul N. (Department: 3616)
Land vehicles
Wheeled
Attachment
C074S493000, C074S496000
Reexamination Certificate
active
10504815
ABSTRACT:
A telescopic shaft for steering of a vehicle is assembled in a steering shaft and includes a male shaft and a female shaft that are so fitted as not to be rotatable but to be slidable. Rolling members are fitted through an elastic body for pre-load between at least a pair of axially-extending grooves formed in an outer peripheral surface of the male shaft and in an inner peripheral surface of the female shaft. A slide member is fitted in between at least another pair of axially-extending grooves formed in the outer peripheral surface of the male shaft and in the inner peripheral surface of the female shaft. When a steering toque is equal to or smaller than a predetermined level, the elastic body for the pre-load exhibits a low rigidity characteristic as the elastic body performs pre-load action. When the steering torque is equal to or larger than the predetermined level, the slide member exhibits a high rigidity characteristic as the slide member engages with the pair of axially extending grooves.
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Ozawa Atsushi
Shoda Akihiro
Yamada Takatsugu
Yamada Yasuhisa
Yukawa Kinji
Dickson Paul N.
Miles & Stockbridge PC
NSK Ltd.
To Toan C.
LandOfFree
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