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:
Nov. 03, 2020
Filed:
Feb. 08, 2018
Northwest Pipe Company, Vancouver, WA (US);
Brent Keil, Vancouver, WA (US);
Northwest Pipe Company, Vancouver, WA (US);
Abstract
A pipe joint has male and female couplers with interfitting features that join pipe sections together when the male coupler is positioned within the female coupler. The couplers can be separate rings or formed in the ends of lengths of pipe. Typically, a male coupler is at one end of a length of pipe and a female coupler is at the opposite end of the pipe. The interfitting features can include three or more ridges or teeth of a first coupler (a male coupler) and the same number of ridges or teeth of a second coupler (a female coupler) each tooth being positioned in a respective transition region of the coupler. Ramp surfaces of the couplers are positioned at opposite sides of each tooth. The ramp surfaces have respective slopes, and the interfitting features are designed to reduce the forces required to push the couplers together into a locked engagement.