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US 11,814,961 B2Granted
Shifting head assisted rotary positive displacement device
OwnerJoshua M. Schmittinventor
Life of this patent
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Abstract
A positive displacement expander with an operating fluid chamber of expansive volume regulated by a shifting head. The shifting head may enhance rotation of a housing utilized to rotate a shaft for providing work to any of a variety of power retrieval devices. Additional efficiencies may also be realized through unique hydraulic layouts for circulating of the operating fluid from a heat exchanger, through the rotary device and to a cold exchanger for continuous operating of the rotary device.
Claims19
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.
3 more elements
A system comprising:
- a rotary positive displacement device with a volume expanding operating fluid chamber defined in part by a rotatable offset housing, 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, and a shifting head of uniform maximum outer diameter responsive to pressure in the operating fluid chamber;
- the housing defining a head chamber to accommodate the shifting head, the head chamber having a tab for slidably interfacing with a parallel surface of a slot of the 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;
- a dedicated heat exchanger for supplying a heated operating fluid to the operating fluid chamber;
- and
- a dedicated cold exchanger for obtaining the operating fluid from the device upon rotation of the housing accommodating the shifting head.
2 more elements
A method of obtaining power from a system, the method comprising:
- circulating operating fluid to a rotary positive displacement device for rotation thereof, the 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, and at least one vane seal between the housing and an inner surface of the casing for further defining the chamber;
- delivering a working force from the rotary device to actuate a power retrieval device for the obtaining of the power in response to the rotation;
- shifting a position of a head of uniform maximum outer diameter in fluid communication with the rotary device to enhance the rotation;
- and
- maintaining the position of the head within a set predetermined maximum range of motion between fully extended and fully retracted position limits by a slidable interfacing of a tab at a parallel side of one of the head and a head chamber accommodating the head with a slot at a side of the other of the head and the head chamber, the fully retracted position limit determined exclusively by the interfacing of the tab and slot.
2 more elements
Dependencies are inferred from the claim text.