Richard L Ehrhardt

Title: Richard L. Ehrhardt and His Skid-Steer Loader Linkage Invention

Introduction

Richard L. Ehrhardt is an inventor associated with Monmouth, Illinois, and Case Corporation. His patent work addresses the design of a linkage arrangement for a skid-steer loader, focusing on how the loader’s arms and tilt mechanism move and interact with the vehicle frame.

Latest Patents

Ehrhardt’s listed patent is “Linkage Arrangement for a Skid-Steer Loader.” It describes an off-highway loading vehicle with lift arms that connect a work implement to the vehicle frame. The forward sections of the arms angle downward, helping them avoid contact with the frame when lowered.

The invention also describes a lifting device that moves the arms between lowered and raised positions, along with a tilt mechanism that adjusts the work implement’s angle. Its components include tilt linkages, extension arms, and tilt cylinders. The cylinders pivot as the lift arms rise or lower, supporting the implement’s movement through lowered, level, and raised tilt positions. Ehrhardt is credited with 1 patent.

Career Highlights

Ehrhardt’s documented patent contribution concerns practical loader mechanics: coordinating lift-arm clearance with the movement and tilt of a work implement. The patent identifies Case Corporation as his company affiliation.

Collaborations

The patent record also names John M. Moffitt and James W. Donoghue as coworkers associated with Ehrhardt.

Conclusion

Richard L. Ehrhardt’s patent describes a skid-steer loader linkage designed to provide lift-arm clearance and controlled implement tilting, reflecting an engineering contribution to off-highway equipment.