US 7,549,324 B2
Consistency transmitter
Toivo Johannes Haapasaari, Kajaani (Finland); Urpo Ensio Heikkinen, Kajaani (Finland); Matti Juhani Laitinen, Kajaani (Finland); Heikki Tapio Leinonen, Kajaani (Finland); Markku Seppänen, Kuluntalahti (Finland); and Eero Ossi Antero Tolonen, Kajaani (Finland)
Assigned to Kajaanin Prosessimittaukset Oy, Kajaani (Finland)
Appl. No. 10/572,109
PCT Filed Sep. 07, 2004, PCT No. PCT/FI2004/000518
§ 371(c)(1), (2), (4) Date Dec. 06, 2006,
PCT Pub. No. WO2005/026697, PCT Pub. Date Mar. 24, 2005.
Claims priority of application No. 20031321 (FI), filed on Sep. 16, 2003.
Prior Publication US 2007/0193344 A1, Aug. 23, 2007
Int. Cl. G01N 11/14 (2006.01); G01N 33/34 (2006.01); G01N 33/00 (2006.01)
U.S. Cl. 73—61.41  [73/53.03; 73/54.23; 73/54.28; 73/54.35] 20 Claims
OG exemplary drawing
 
1. Consistency transmitter capable of measuring the consistency and viscosity of matter, comprising a measuring element fastened to an end of a torsion shaft, a drive shaft, differential elements connecting the torsion shaft and drive shaft to each other, and an insertion pipe and valve combined with the insertion pipe for the purpose of inserting the consistency transmitter into a process to be measured while said process is operating, wherein:
a motor of the consistency transmitter comprises a direct drive stator and rotor, rotation axes of which are coaxial with the rotation axes of the measuring element, torsion shaft, differential elements, drive shaft and the insertion pipe, whereby the consistency transmitter has no separate motor; instead the stator is integrated into a stator base and the rotor is integrated into drive shaft, so that the drive shaft also functions as a rotor shaft;
the drive shaft is fit with drive shaft bearings on a drive shaft body and the drive shaft bearings are also arranged to act as rotor bearings;
the drive shaft and the rotor have common covers and seals;
the drive shaft is comprised of one piece and comprises an end that protrudes into the process being measured; and
the torsion shaft is bearing-mounted inside the drive shaft.