US 11,814,961 B2
Shifting head assisted rotary positive displacement device
Joshua M. Schmitt, San Antonio, TX (US)
Filed by ThermalTech Holdings, LLC, Westport, CT (US)
Filed on Aug. 20, 2021, as Appl. No. 17/407,883.
Application 17/407,883 is a continuation in part of application No. 16/963,080, filed on Jul. 17, 2020, granted, now 11,333,101.
Application 16/963,080 is a continuation in part of application No. 16/461,947, filed on May 17, 2019, abandoned.
Prior Publication US 2021/0381506 A1, Dec. 9, 2021
Int. Cl. F01C 1/344 (2006.01); F04C 29/04 (2006.01); F04C 2/344 (2006.01); F01C 21/08 (2006.01); F01C 20/18 (2006.01)
CPC F01C 1/3442 (2013.01) [F01C 20/18 (2013.01); F01C 21/0845 (2013.01); F04C 2/344 (2013.01); F04C 29/04 (2013.01); F04C 2210/105 (2013.01); F04C 2210/222 (2013.01); F04C 2210/227 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A rotary positive displacement device comprising:
a rotatable offset housing defining an operating fluid chamber;
a casing about the housing for altering a volume of the chamber;
at least one vane seal between the housing and an inner surface of the casing for further defining the chamber;
a position shiftable head of uniform maximum outer diameter for further defining the chamber to responsively regulate chamber volume in response to the altering thereof; and
a tab of the housing for slidably interfacing with a parallel surface of a slot of the position shiftable head to establish a set predetermined maximum range of motion for the head between fully extended and fully retracted position limits, the fully retracted position limit determined exclusively by the interfacing of the tab and slot.