US 11,905,792 B2
Coring apparatus for rubber stator
Paul D. Jezek, Houston, TX (US)
Assigned to Clean-Tube LLC, Tomball, TX (US)
Filed by Clean-Tube LLC, Tomball, TX (US)
Filed on Aug. 17, 2022, as Appl. No. 17/889,918.
Application 16/171,119 is a division of application No. 14/623,814, filed on Feb. 17, 2015, granted, now 10,151,145, issued on Dec. 11, 2018.
Application 17/889,918 is a continuation of application No. 16/837,882, filed on Apr. 1, 2020, granted, now 11,542,749.
Application 16/837,882 is a continuation of application No. 16/171,119, filed on Oct. 25, 2018, granted, now 10,787,860, issued on Sep. 29, 2020.
Prior Publication US 2023/0096992 A1, Mar. 30, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. E21B 4/02 (2006.01); F04C 2/107 (2006.01); B23B 41/00 (2006.01)
CPC E21B 4/02 (2013.01) [B23B 41/00 (2013.01); B23B 2226/33 (2013.01); F04C 2/1071 (2013.01); F04C 2230/70 (2013.01)] 27 Claims
OG exemplary drawing
 
1. An apparatus for removing rubber stator material from inside a housing, the apparatus comprising:
at least one drive configured to impart rotation about a longitudinal axis;
a head being passable at least partially inside the housing along the longitudinal axis of the imparted rotation;
at least one blade pivotably connected at a pivot point to the head, the at least one blade being pivotable about the pivot point at a plurality of pivot positions relative to the longitudinal axis and being configured to remove the rubber stator material at least partially from inside the housing along the longitudinal axis of the imparted rotation;
an actuator associated with the at least one blade and being configured to adjust the at least one blade to any one of the pivot positions relative to the longitudinal axis, the actuator comprising:
a piston having a shoulder disposed on the head, the shoulder being movable against the at least one blade; and
a source disposed in fluid communication with the piston and supplying fluid pressure to the piston, wherein the shoulder is movable against the at least one blade in response to the fluid pressure supplied from the source to the piston; and
a shaft on which the head is disposed, the shaft communicating the fluid pressure from the source to a pressure chamber of the piston disposed on the shaft.