Double wrap friction brake band and method of manufacture
AssigneeAdvanced Friction Materials Co.
InventorsOscar Stefanutti, Omar P. Oszust, Richard T. Popchock
Life of this patent
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Abstract
A double wrap brake band for controlling the clutch drum of an automatic transmission for a vehicle. The band is formed from an integrally stamped strap the ends of which are joined to form the circular band. The strap includes longitudinal slots forming three parallel straps which control the constriction and expansion of the band. A first bracket secured to the outer straps and a second bracket secured to the intermediate strap facilitate control of the constriction/expansion movement. The brackets are secured to the straps such that breakage and malfunction are reduced.
Claims30
A double wrap brake band for a vehicle transmission, said brake band comprising:
- a plurality of substantially parallel straps, each of said straps having a first free end, and said plurality of straps including a pair of spaced straps joined to each other by a band portion, wherein said pair of straps and said band portion are one piece, and at least one intermediate strap, said free ends of said pair of straps connected to a first bracket spanning said at least one intermediate strap, said free end of said at least one intermediate strap having a second bracket mounted thereto.
A double wrap brake band for a vehicle transmission, said brake band comprising:
- three substantially parallel straps including a pair of outermost straps and intermediate strap, said straps having a first free end and a second end, said second end of said outermost straps directly joined to said second end of said intermediate strap to form a substantially circular brake band;
- a first bracket connected to said first free ends of said outermost straps, said first bracket spanning said intermediate strap in spaced apart relation;
- and
- a second bracket connected to said first free end of said intermediate strap.
A method of making a double wrap band for an automotive transmission comprising the steps of:
- stamping an elongated band having three substantially parallel straps, an intermediate strap having a first free end and a second end connected to a pair of outermost straps by removable strap segments;
- directly joining the ends of said elongated band;
- securing a first bracket to first ends of said outermost straps, said first bracket spanning said intermediate strap in spaced apart relation thereto;
- securing a second bracket to aid first free end of said intermediate strap;
- and
- removing said removable strap segments from said band thereby disconnecting said first ends of said outermost straps from said intermediate strap, said second end of said intermediate strap joined to a second end of said outermost straps.
A double wrap brake band for a vehicle transmission, said brake band comprising:
- a plurality of substantially parallel straps, said straps having a first free end and including a pair of spaced straps and at least one intermediate strap, said free ends of said spaced straps connected to a first bracket spanning said at least one intermediate strap, said free end of said at least one intermediate strap having a second bracket mounted thereto;
- wherein at last one of said brackets and a respective strap end are joined by at least one projection on one of said bracket and said respective strap end registering with an aperture in the other one of said bracket and said respective strap end;
- and
- wherein said projection includes a base initially larger than said aperture.
A double wrap brake band for a vehicle transmission, said brake band comprising:
- a plurality of substantially parallel straps, said straps having a first free end and including a pair of spaced straps joined to each other by a band portion and at least one intermediate strap, said free ends of said pair of straps connected to a first bracket spanning said at least one intermediate strap, said free end of said at least one intermediate strap having a second bracket mounted thereto;
- wherein at least one of said brackets include at least one projection registering with an aperture in a respective strap end;
- and
- said projection includes a base initially larger than said aperture.
Dependencies are inferred from the claim text.