Richard P Riefel

Title: Richard P. Riefel: Innovator in Hydraulic Pump Technology

Introduction

Richard P. Riefel is a notable inventor based in Saginaw, MI (US). He has made significant contributions to the field of hydraulic pump technology, holding a total of 2 patents. His innovative designs have improved the efficiency and functionality of hydraulic systems.

Latest Patents

Riefel's latest patents include a rotary hydraulic vane pump with undervane passages for priming. This balanced vane type hydraulic pump features a thrust plate and a pressure plate that work in conjunction with a cam ring, rotor, and vanes to create multiple pump chambers. The design allows fluid trapped under the vanes to flow from the discharge port to the inlet port, enhancing pump priming. The undervane fluid is channeled through grooves in both plates, with specific restrictions to optimize fluid flow and assist in vane extension.

Another significant patent is the engine-driven vacuum pump. This invention combines a two-stage, low noise demountable pump assembly with a camshaft-driven eccentric drive arrangement. It includes internal oil distribution and pumping mechanisms for lubricating the drive and pump pushrod elements. A check valve in the pump assembly cover defines a second stage pumping chamber, which increases efficiency while reducing external noise from gas discharge.

Career Highlights

Richard P. Riefel is currently employed at GM Global Technology Operations, Inc. His work has been instrumental in advancing hydraulic pump technology, contributing to the automotive industry's efficiency and performance.

Collaborations

Riefel has collaborated with notable coworkers such as Thomas W. Weisgerber and Brian K. Nelson. Their combined expertise has fostered innovation and development in their projects.

Conclusion

Richard P. Riefel's contributions to hydraulic pump technology through his patents demonstrate his commitment to innovation and efficiency. His work continues to impact the industry positively.