Appeal No. 2005-1175 Page 2
Application No. 09/727,465
BACKGROUND
The appellant's invention relates to a trapezoid thread for use in connecting the
body of a spray paint gun to its air nozzle ring (specification, page 1). Claim 12 is
representative of the invention and reads as follows:
12. In a spray gun comprising a gun body having a male
thread, and
an air nozzle ring having [a] female thread, the female
thread being adapted to be screwed onto the male thread,
the improvement comprising:
wherein the male and female threads are trapezoid
threads having a flank angle of approximately 30o, wherein
the male and female threads have thread diameters between
about 30 and about 40 mm, and wherein the male and
female threads are characterized by:
thread heights of approximately 1.1 mm,
root to crest clearance of approximately 0.1 mm, and
flank clearance of approximately 0.15 mm.
The Prior Art
The examiner relied upon the following prior art references of record in rejecting
the appealed claims:
Kubis 4,906,151 Mar. 6, 1990
Lewis et al. (Lewis) 6,250,567 Jun. 26, 2001
The Rejection
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