Air velocity measurement instrument
AssigneeHeidelberger Druckmaschinen AG
InventorRobert S. Rejewski
Life of this patent
Estimating the term…
Abstract
An installed or temporarily inserted air flow instrument 48 measures air flow in a pneumatic subsystem of a cleaning station in a copier or printer. The air flow instrument has a pitot tube 52 and a static pressure tube 54. The pitot tube is substantially parallel to the length of in-line adapter 50, is centered within in-line adapter 50, and terminates in impact end 74. Static pressure tube 54 is substantially transverse to the length of in-line adapter 50. Static pressure tube 54 penetrates adapter wall 64 of in-line adapter 50 and is flush with adapter inner surface 66 of in-line adapter 50. The pressure difference at the ends of the pitot and static pressure tube represents a measurement of the air flow in the body of the air flow instrument.
Claims44
A pneumatic velocity measurement instrument, comprising:
- an in-line adapter comprising an elongate, substantially rigid hollow body with outer and inter surfaces and open first and second ends, said in-line adapter having an average expected pneumatic flow direction;
- a pitot tube having an elongate passageway open at both ends, said pitot tube extending through said body of said in-line adapter and having one open end inside said body, facing in a direction substantially opposite to said average expected pneumatic flow direction;
- and
- a static pressure tube, comprising an elongate passageway terminating in opposite, open ends, with one end of said static pressure tube penetrating said body of said in-line adapter, being substantially flush with said inner surface of said in-line adapter, and extending outward from said body.
A machine, comprising:
- a pneumatic passage having a passage shape and a passage cross-sectional area;
- an pneumatic mover in fluid communication with said pneumatic passage for moving gasses through said pneumatic passage and transverse to the cross-sectional area;
- a pneumatic velocity measurement instrument installed in said pneumatic passage, said pneumatic velocity measurement instrument, comprising;
- an instrument shape being substantially the same as said passage shape;
- an instrument cross-sectional area being substantially the same as said passage cross-sectional area;
- an in-line adapter having an elongate, substantially rigid hollow body with outer and inner surfaces and open first and second ends, said in-line adapter having an average expected pneumatic flow direction;
- a pitot tube, having an elongate passageway open at both ends, said pitot tube extending through said body of said in-line adapter and having one open end inside said body, facing in a direction substantially opposite to said average expected pneumatic flow direction;
- and
- a static pressure tube, having an elongate passageway terminating in opposite, open ends, one end of said static pressure tube penetrating said body of said in-line adapter, being substantially flush with said inner surface of said in-line adapter, and extending outward from said body.
A flattened pneumatic passage, comprising:
- a top plate having a top plate undersurface;
- a bottom plate having a bottom plate top surface;
- an average pneumatic flow direction;
- a pneumatic velocity measurement instrument comprising
- a plug adapter comprising a substantially circular and rigid bottom portion with a plug undersurface and a flanged portion, said plug adapter installed in said top plate such that said plug undersurface is substantially flush with top plate undersurface;
- a pitot tube having an elongate passageway open at both ends, said pitot tube extending through said plug adapter and having one open end below said undersurface and facing a direction substantially opposite to said average pneumatic flow direction;
- and
- a static pressure tube, comprising an elongate passageway terminating in opposite, open ends, with one end of said static pressure tube penetrating said plug adapter, being substantially flush with said undersurface of said bottom portion, and extending outward from said flanged portion.
A pneumatic velocity measurement device, comprising:
- an in-line adapter comprising an elongate, substantially rigid body with a top plate with an undersurface, a bottom plate with a top surface and open first and second ends, said in-line adapter having an average expected pneumatic flow direction;
- a pitot tube having an elongate passageway open at both ends, said pitot tube extending through said body of said in-line adapter and having one open end inside said body, facing in a direction substantially opposite to said average expected pneumatic flow direction;
- and
- a static pressure tube, comprising an elongate passageway terminating in opposite, open ends, with one end of said static pressure tube penetrating said body of said in-line adapter, being substantially flush with said undersurface of said in-line adapter, and extending outward from said body.
Dependencies are inferred from the claim text.