Patent ID: 9335191
Filing Date: 2016-05-10
CPC Classification: G01F

Claim Text:
1. A high-precision pressure sampling head used in a Pitot tube flow sensor, comprising: a cylindrical pressure sampling head body; a cylindrical upper connecting portion formed on an upper end of the pressure sampling head body; a total pressure channel formed in the cylindrical pressure sampling head body, wherein the total pressure channel has an axis parallel to an axis of the cylindrical pressure sampling head body; a static pressure channel formed in the pressure sampling head body, wherein the static pressure channel has an axis parallel to the axis of the cylindrical pressure sampling head body; a total pressure channel opening formed on the cylindrical upper connecting portion, wherein the total pressure channel passes through the cylindrical upper connecting portion and the total pressure channel opening is thus formed; a static pressure channel opening formed on the cylindrical upper connecting portion, wherein the static pressure channel passes through the cylindrical upper connecting portion and the static pressure channel opening is thus formed; a total pressure sensing hole formed on a lower end of the cylindrical pressure sensing head body and connecting to the total pressure channel; a static pressure sensing hole formed on the lower end of the cylindrical pressure sensing head body and connecting to the static pressure channel; and a first inclined surface and a second inclined surface formed on two opposite sides of the lower end of the cylindrical pressure sampling body; wherein the first inclined surface intersects with the total pressure channel and thus the total pressure sensing hole is formed on the first inclined surface, the second inclined surface intersects with the static pressure channel and thus the static pressure sensing hole is formed on the second inclined surface and an angle α formed between the first inclined surface and the axis of the cylindrical pressure sampling head body is smaller than the angle θ formed between the second inclined surface and the axis of the cylindrical pressure sampling head body.