Company Filing History:
3 out of 301 
2 out of 31 
1 out of 832,843 Years Active: 1981-1998
Title: Innovations of Robert A Cunningham
Introduction
Robert A Cunningham is a notable inventor based in Bellaire, Texas, who has made significant contributions to the fields of medical and drilling technology. With a total of six patents to his name, Cunningham has demonstrated a commitment to innovation and problem-solving in his work.
Latest Patents
Cunningham's latest patents include a hip implant prosthesis designed to enhance the stability and functionality of femoral prostheses. This innovative design features load shoulders that transfer normal loading to the femur, thereby reducing stress shielding. The femur is resected to create a flat load shoulder that is perpendicular to its axis. The prosthesis includes a mating load shoulder in its proximal section, which aligns with the load shoulders formed in the femur. Additionally, the prosthesis has a stem that extends downward to a distal end, with an intermediate portion that is reduced in diameter to add flexibility. The distal end is designed to match the diameter of the bone cavity.
Another significant patent is for a drill pipe inside blowout preventer, which is utilized in earth boring drill strings. This blowout preventer incorporates features that reduce erosion, enhancing its durability. It consists of a valve body that connects into the drill string, with a longitudinal passage extending through the body. The design includes a ball seat located in the longitudinal passage, along with a ball storage location positioned below the seat and offset from the passage. This innovative mechanism allows for efficient operation during both downward and upward flow.
Career Highlights
Throughout his career, Robert A Cunningham has worked with prominent companies, including Hughes Tool Company LLC and Hughes Tool Company. His experience in these organizations has contributed to his expertise in developing innovative solutions in his field.
Collaborations
Cunningham has collaborated with notable colleagues such as James R Hall and George E Dolezal, further enhancing his contributions to the industry.
Conclusion
Robert A Cunningham's work exemplifies the spirit of innovation and dedication to improving technology in both medical and drilling applications. His patents reflect a deep understanding of engineering principles and a commitment to advancing these fields.