Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
129 words
An air flow measuring station for sensing pressures in an air duct having air flowing therethrough and for supplying the sensed pressures to a measuring means, said station comprising an air flow straightening section arranged in said duct for producing substantially laminar air flow; a plurality of total pressure sensors positioned in said duct immediately adjacent to and downstream of said air straightening section; manifold means for communicating each of said total pressure sensors with one another; and conduit means for communicating the pressure existing in the manifold means with the measuring means, said conduit means being connected to said manifold means at a connecting place arranged symmetrically wiTh respect to the total pressure sensors whereby an average total pressure in said duct is supplied to said conduit means.
Claim 2
Dependent Claim
129 words
An air flow measuring station for sensing pressures in an air duct having air flowing therethrough and for supplying the sensed pressures to a measuring means, said station comprising an air flow straightening section arranged in said duct for producing substantially laminar air flow; a plurality of total pressure sensors positioned in said duct immediately adjacent to and downstream of said air straightening section; manifold means for communicating each of said total pressure sensors with one another; and conduit means for communicating the pressure existing in the manifold means with the measuring means, said conduit means being connected to said manifold means at a connecting place arranged symmetrically wiTh respect to the total pressure sensors whereby an average total pressure in said duct is supplied to said conduit means.
Claim 3
Dependent Claim
53 words
An air flow measuring station as set forth in claim 1, wherein said air flow straightening section comprises a plurality of parallel, axially extending passages and wherein each of said total pressure sensors is positioned at the center of respective cross-sectional segments of said station which are equal in area to one another.
Claim 4
Dependent Claim
30 words
An air flow measuring station as set forth in claim 2 wherein said parallel axial passages are formed by a honeycomb section which completely fills the cross-section of the station.
Claim 5
Dependent Claim
30 words
An air flow measuring station as set forth in claim 3 wherein the longitudinal extent of the honeycomb section is greater than the diameters of the openings in the honeycomb.
Claim 6
Dependent Claim
56 words
An air flow measuring station as set forth in claim 1 further including means sensing and averaging the static pressure substantially at the plane of the openings of said total pressure sensors; and meter means utilizing the average total pressure and the average static pressure to derive an output proportional to air velocity and flow volume.
Claim 7
Dependent Claim
28 words
An air flow measuring station as set forth in claim 1, wherein said connecting place is arranged symmetrically with respect to the internal volume of said manifold means.
Claim 8
Dependent Claim
38 words
An air flow measuring station as set forth in claim 1, wherein all of said total pressure sensors have openings terminating substantially in a single plane extending transverse to the direction of air flow through the air duct.
Claim 9
Dependent Claim
24 words
An air flow measuring station as set forth in claim 4, wherein said station includes an outer casing forming a portion of the duct.
Claim 10
Dependent Claim
87 words
An air flow measuring station as set forth in claim 6, wherein said manifold means consists of two mutually perpendicular pipes intersecting and communicating with one another at the connecting place and a plurality of rigid tubes on each pipe, each of said rigid tubes extending perpendicularly an equal distance from both sides of the respective pipes, one total pressure sensor being arranged at each end of each of the rigid tubes, the diameter of said rigid tubes being substantially less than the diameter of said pipes.
Claim 11
Dependent Claim
40 words
An air flow measuring station as set forth in claim 5 wherein the means sensing and averaging the static pressure comprises a plurality of manifolded closed end-tubes each perforated with holes transversely with respect to the direction of air flow.