Friction plate
AssigneeNSK-Warner K.K.
InventorsTetsuya Wakamori, Rikiya Takahashi
Life of this patent
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Abstract
A friction plate comprising a substantially annular core plate and a frictional material segment disposed on the core plate and including inner and outer peripheries and a concave cut-away portion provided at at least one of corner portions joining sides of the frictional material segment to at least one of the inner and outer peripheries.
Claims54
A friction plate comprising:
- a substantially annular core plate;
- and
- a frictional material segment disposed on said core plate and including inner and outer peripheries and a concave cut-away portion provided at at least one of corner portions joining sides of said frictional material segment to at least one of said inner and outer peripheries.
A punching apparatus comprising a punch and a die constructed for punching a frictional material segment from a frictional material, wherein said frictional material segment includes inner and outer peripheries and a concave cut-away portion provided at at least one of corner portions joining sides of said frictional material segment to at least one of said inner and outer peripheries.
A friction engagement apparatus comprising:
- a friction plate including at least one frictional material segment and engageable with a separator plate for transmitting motive power,
- wherein said at least one frictional material segment includes inner and outer peripheries and a concave cut-away portion provided at at least one of corner portions joining sides of said frictional material segment to at least one of said inner and outer peripheries.
A frictional material segment having:
- an inner periphery;
- an outer periphery;
- sides joined to said inner periphery and said outer periphery at corner portions;
- and
- a concave cut-away portion provided at at least one of said corner portions.
A method for punching a frictional material segment having inner and outer peripheries and a concave cut-away portion provided at at least one of corner portions joining sides of said frictional material segment to at least one of said inner and outer peripheries, said method comprising punching a part of said frictional material segment including said concave cut-away portion and thereafter punching the remainder of said frictional material segment.
A method for punching a frictional material segment from a frictional material with a punch and a die, said method comprising punching said frictional material segment having inner and outer peripheries and a concave cut-away portion provided at at least one of corner portions joining sides of said frictional material segment to one of said inner and outer peripheries that is upstream from the other in relation to a feed direction of said frictional material.
A punching apparatus comprising a punch and a die constructed to punch a frictional material segment from a frictional material, the frictional material segment including inner and outer peripheries and a concave cut-away portion provided at at least one of corner portions joining sides of said frictional material segment to one of said inner and outer peripheries that is upstream from the other in relation to a feed direction of said frictional material.
Dependencies are inferred from the claim text.