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:
Jan. 29, 2013
Filed:
Mar. 16, 2010
Scott E. Zabelka, Plainfield, IL (US);
Scott E. Zabelka, Plainfield, IL (US);
Miner Elastomer Products Corporation, Geneva, IL (US);
Abstract
A well head lubricator assembly including an elongated rigid tubular body defining an interior chamber open at a lower end to receive a plunger at a well head. The plunger is slidably positioned within the chamber in response to forces or loads acting thereon and has a seat arranged toward an upper end thereof. An upper end of the tubular body is closed. An axially elongated one-piece thermoplastic ether ester elastomer spring is slidingly positioned within the interior chamber of the tubular body. One end of the spring is seated on the seat of the plunger. The spring defines an elongated bore opening to opposed ends thereof. Moreover, the spring is provided with a plurality of axially spaced flange sections along a length thereof for guiding the spring for endwise sliding movement on an inside diameter of the tubular body. Any two flange sections on the spring are axially separated by an energy absorbing section for allowing the spring to react to energy imparted to the plunger. Each energy absorbing section on the spring defines a wall having a lateral thickness ranging between about 20% to about 30% of an axial length of the energy absorbing section extending axially between any two adjacent flange sections and such that radial expansion of the energy absorbing sections is limited to about an outermost edge of the flange sections.