Riverhawk Company

Richard Joseph Donegan

Robert Michael Whitney

Timothy J Trautman

Charles B Gibbons

Patrick Shawn Reilly

A system for tensioning a stud that projects from a structural member is provided. The system comprises a safety guard including a guard housing and a hydraulic interlock assembly, and a tensioning system coupled with a first end of the stud. The guard housing surrounds at least a portion of the tensioning system and is coupled with a second end of the stud and the hydraulic interlock assembly. The hydraulic interlock assembly is coupled with the guard housing and the tensioning system. The hydraulic interlock assembly provides fluid communication of a hydraulic fluid from a hydraulic source to the tensioning system to tension the stud.

Safety guard for a hydraulic device

A tensioning system for tensioning a stud is provided. The system includes a nut having an external surface, an internal surface engaging the external surface of the stud or puller screw, and at least two bores defined therein. The posts have first and second ends and are disposed in the bores. The first ends engage a stop surface, and the second ends extend outwardly from the bores. A cylinder includes an internal surface engaged with the external surface of the nut, and has a bore defined therein. A locking screw may be threadably positioned within the cylinder bore and engages the nut. A piston is positioned within the cylinder to define a hydraulic chamber and is configured for being engaged with the second ends of the posts. Further, a biasing member is disposed between the nut and piston. A tensioning system safety guard is also provided.

Hydraulic rod tensioning system

A lamellar rotational flexure pivot may include a first pivot end, and second pivot end, and a divider layer positioned therebetween to allow first and second pivot ends to pivot relative to one another. The first and second pivot ends may include a plurality of spring layers and spacer layers that are stacked in alternating fashion to form the lamellar rotational flexure pivot.

Growing community of inventors

Constantia, NY, United States of America

Richard Joseph Donegan