Tindall Corporation

Matthew S Alesch

Kevin Kirkley

John Michael Romano

Bryant A Zavitz

Various implementations include a duct coupler including a body, a first and second arm, and a first and second tooth. The body has a first end that faces a first axial direction, a second end that faces a second axial direction, and a wall. The first and second arm each have a fixed end coupled to the second end and free end axially spaced apart from the fixed end. Each of the free ends are resiliently urgeable in a radial direction. The first tooth is coupled to the first arm, and the second tooth is coupled to the second arm. The teeth are shaped such that, when the teeth are engaged with a corrugation of a corrugated duct, the teeth allow the duct coupler to move in the first axial direction with less axial force than moving the duct coupler in the second axial direction.

Devices, systems, and methods for connecting concrete structural elements

Various implementations include a device for pumping grout. The device includes a body and a pump. The body defines a first opening, a second opening, and a third opening. Each of the first, second, and third openings is in fluid communication with each other. The first opening includes a first one-way valve configured to allow the flow of grout toward the second and third openings, and the second opening includes a second one-way valve configured to allow the flow of grout away from the first and third openings. The pump is sealingly coupled to the third opening and in fluid communication with the first and second openings. The pump is configured to increase and decrease pressure within the body to cause the flow of grout from the first opening to the second opening.

Growing community of inventors

Atlanta, GA, United States of America

Matthew S Alesch