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US 6,320,299 B1Granted
Friction member used in vibration wave driving apparatus, and device using the vibration wave driving apparatus as driving source
AssigneeCanon Kabushiki Kaisha
InventorsKoji Kitani, Naruto Sugimoto
Life of this patent
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Abstract
A friction member is used in a friction portion in a vibration wave driving apparatus. The friction member comprises a composite resin which comprises polytetrafluoroethylene as a matrix and which further comprises at least an inorganic fiber substance and a heat-resistant resin. A ratio of a content Vf (vol %) of the inorganic fiber substance to a content Vr (vol %) of the heat-resistant resin satisfies the following relation: ⅓≦Vf/Vr≦3.
Claims21
A friction member used in a friction portion in a vibration wave driving apparatus, said friction member comprising:
- a composite resin comprising a polytetrafluoroethylene matrix and further comprising at least an inorganic fiber substance and a heat-resistant resin,
- wherein a ratio of a content Vf (vol %) of said inorganic fiber substance to a content Vr (vol %) of said heat-resistant resin satisfies the following relation:
- ⅓≦Vf/Vr≦3.
A vibration wave driving device comprising:
- a vibration member having a frictional contact portion;
- and
- a contact member having a frictional contact portion, said vibration member and said contact member being arranged in contact so as to move relative to one other,
- wherein a friction member used in the frictional contact portion of one of said vibration member and said contact member is a composite resin which comprises a polytetrafluoroethylene matrix and which further comprises at least an inorganic fiber substance and a heat-resistant resin, wherein a ratio of a content Vf (vol %) of said inorganic fiber substance to a content Vr (vol %) of said heat-resistant resin in said composite resin satisfies the following relation:
- ⅓≦Vf/Vr≦3.
2 more elements
Dependencies are inferred from the claim text.