Appeal No. 2000-1737
Application No. 08/965,180
The claimed subject matter relates to an elevator safety
brake. At least a portion of the friction surface of the
brake comprises an alloy material formed from approximately
99.4 weight percent molybdenum, 0.5 weight percent titanium,
and 0.1 weight percent zirconium. This alloy provides a brake
with a high coefficient of friction and low wear suitable for
use in a high speed, high load elevator.
Claim 1, appended to appellants' brief, is further
illustrative of appellants' claimed subject matter.
According to appellants' brief, claims 1 and 4 through 7
stand or fall together.
The references of record relied upon by the examiner as
evidence of obviousness are:
Black 3,841,949 Oct. 15,
1974
Marin 3,871,934 Mar. 18,
1975
Okada et al. (Okada '827) GB 2 274 827 Aug. 10,
1994
Okada et al. (Okada '451) GB 2 287 451 Sep. 20,
1995
Promisel, N. E. "The Science and Technology of Tungsten,
Tantalum, Molybdenum, Niobium and Their Alloys." (Published
1964), pg. 572.
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