The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 2025
Filed:
May. 23, 2022
Applicant:
Epic Lift Systems, Houston, TX (US);
Inventors:
Robert G. Roycroft, Houston, TX (US);
Shannon Freeman, Tomball, TX (US);
Assignee:
Epic Lift Systems, Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
E21B 43/12 (2006.01); E21B 34/06 (2006.01); F04B 47/12 (2006.01); F04B 53/12 (2006.01);
U.S. Cl.
CPC ...
E21B 43/121 (2013.01); E21B 34/06 (2013.01); F04B 47/12 (2013.01); F04B 53/129 (2013.01);
Abstract
Described herein are embodiments of systems and apparatuses that include a dart and/or a clutch for a dart plunger. In an exemplary embodiment, the clutch consists of a one-piece unit having a length, an outside diameter, and an inside diameter where at least a portion of the inside diameter is sized to create a frictional interface with a dart. The clutch may also include a gap, a slot, and/or a spiral cut. The dart may include a shaft having opposite ends and a shaft diameter that varies between the opposite ends.