US 11,655,814 B2
Progressive cavity pump for the tintometric industry
Leandro José Agostini, Porto Alegre (BR); and Marcelo Angelo Taparello de Souza, São Leopoldo (BR)
Appl. No. 17/264,182
Filed by Leandro José Agostini, Porto Alegre (BR)
PCT Filed Mar. 13, 2020, PCT No. PCT/BR2020/050089
§ 371(c)(1), (2) Date Jan. 28, 2021,
PCT Pub. No. WO2020/186324, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 1020190051140 (BR), filed on Mar. 15, 2019.
Prior Publication US 2021/0172438 A1, Jun. 10, 2021
Int. Cl. F04C 2/10 (2006.01); F01C 1/10 (2006.01); F04C 2/107 (2006.01)
CPC F04C 2/107 (2013.01) [F04C 2240/20 (2013.01); F04C 2240/30 (2013.01); F04C 2240/60 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A progressive cavity pump for a tintometric closing system, comprising:
a rotor in the form of helical screw;
an elastomer stator wherein the rotor including a circular section having an eccentricity along a helical step and a helical length of two steps, which form one stage; and
a plastic shell including an upper body having a fluid input channel and a fluid output channels each including housings configured for snap insertion of plastic hoses via a dimensional interference between an inner diameter of each of the housings and an outer diameter of each of the plastic hoses;
wherein the shell includes a cone-shaped internal housing having over four sides for assembly of the stator and two radial locks for assembly of a spacer.
 
4. A progressive cavity pump for a tintometric closing system, comprising:
a rotor in the form of helical screw;
an elastomer stator wherein the rotor including a circular section having an eccentricity along a helical step and a helical length of two steps, which form one stage; and
a plastic shell including an upper body having a fluid input channel and a fluid output channel each including housings configured for snap insertion of plastic hoses via a dimensional interference between an inner diameter of each of the housings and an outer diameter of each of the plastic hoses;
wherein the rotor includes a cylindrical, non-helical section to facilitate a dimensional evaluation of the circular section; and
wherein the shell includes a cone-shaped internal housing having over four sides for assembly of the stator and two radial locks for assembly of a spacer.