Other

Npk Construction Equipment, Inc.

Ron R Karani

Daniel E Tyrrell

A heavy duty shear attachable to the boom of an excavator comprises a fixed lower jaw and a movable upper jaw driven by a hydraulic cylinder. To overcome jams, the cylinder is provided with hydraulic fluid at a higher pressure in the open direction than in the close direction.

Heavy duty shear with anti-jam feature

An apparatus and method of measuring and comparing actual and relative impact forces of an impact machine to determine the operating parameters of the machine wherein the apparatus includes a vessel containing a fluid, a vessel piston which moves into the vessel in a substantially frictionless manner upon impact by the impact machine to create a force on the fluid in the vessel and a measuring system to measure the forces applied to the apparatus.

Meter for comparing impact hammers

An improved hydraulic cylinder with a hydraulic impact hammer integrated into the cylinder rodhead of the hydraulic cylinder is provided. The hydraulic hammer is positioned inside a central chamber of the cylinder rodhead such that the impact piston can deliver at least one blow along the longitudinal axis of the cylinder rod to create an additive pulse of force.

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Chagrin Falls, OH, United States of America

Ron R Karani