Appeal No. 2003-2069
Application 09/414,867
The disclosed invention pertains to a fuel flowmeter for
providing accurate and reliable flow measurement.
Representative claim 1 is reproduced as follows:
1. Fuel flowmeter apparatus comprising a first flowmeter,
partially cylindrical housings, rotating impellers having meshed
lobes rotatable in the partially cylindrical housings joined in a
case having an inlet at one side and an outlet at an opposite
side, fuel moving in the inlet and filling voids between the
lobes in the impellers and moving cylindrically around opposite
partially cylindrical walls and turning the impellers until
reaching the outlet, the inlet and the outlet having flow
conditioners for smoothing flow, reducing turbulence and
promoting lamellar flow into and out of the case, a magnetic
marker on at least one of the impellers, a transmitter mounted on
the case, the transmitter having a Hall effect sensor for sensing
passage of the marker as a pulse, a first signal conditioning
software connected to the Hall effect sensor for adjusting
transmitted information according to measured pulse rate and a
standard flow, the transmitter having a temperature sensor, and a
second signal conditioning software connected to the temperature
sensor for adjusting transmitted flow rate signals according to a
difference between sensed temperature and standard temperature.
The examiner relies on the following references:
Colonnello 4,612,804 Sep. 23, 1986
Lagergren et al. (Lagergren) 4,798,092 Jan. 17, 1989
Claims 1-35 stand rejected under 35 U.S.C. § 103(a). As
evidence of obviousness the examiner offers Lagergren in view of
Colonnello.
Rather than repeat the arguments of appellants or the
examiner, we make reference to the briefs and the answer for the
respective details thereof.
-2-
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Next
Last modified: November 3, 2007