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:
Mar. 22, 1977
Filed:
Jul. 18, 1975
Luis Poma, San Salvador, SL;
Interpile USA, Inc., New Orleans, LA (US);
Abstract
Driving tips for forming cast-in-place caseless piles by driving a vertically elongated mandrel having one of the driving tips releasably fitted on the bottom of the mandrel, to thereby produce the pile-forming hole in the earth to be filled with flowable concrete or other fill material. The driving tips have a lower leading end plate of circular cross-section of larger diameter than the mandrel, and include straight parallel rod members rising perpendicularly from the end plate paralleling the center axis of the end plate and located at circumferentially spaced locations along a circular path having a diameter slightly smaller than the inner diameter of the mandrel and concentric with said center axis, rods or cylindrical members to interfit in the hollow interior bore in the mandrel and thereby center the tip relative thereto.