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:
Apr. 19, 1977
Filed:
Jul. 18, 1975
Luis Poma, San Salvador, SL;
Interpile USA, Inc., New Orleans, LA (US);
Abstract
Apparatus for forming cast-in-place caseless concrete piles wherein an elongated mandrel having a driving tip or foot releasably coupled on its lower end to be driven into the ground and form a pile-forming hole. The mandrel passes through the lower discharge opening of a fill hopper at ground level containing a supply of flowable concrete which flows by gravity into the pile-forming hole as it is being formed. The fill hopper has a self-sealing rigid cylindrical skirt extending downwardly from the discharge opening, and the driving tip or foot has an enlarged circular portion of slightly larger diameter than the skirt and axially alined vertically below the skirt to form the pile hole of such size and shape that the skirt advances into the pile hole during initial soil penetration of the tip to seal against loss of concrete along the ground. The fill hopper is compartmentalized to provide a plurality of substantially like capacity subdivision compartments each adapted to receive a quantity of the flowable fill material, and discharge control means are provided for each of the compartments for permitting discharge of fill material into the pile-forming hole being formed by the mandrel and tip.