This inventor holds 15 USPTO granted patents. Top assignees: Texaco Inc., Keystone International Holdings Corp., Keystone International. Active years: 1976-1999.
Location History:
- Houston, TX (US) (1976 - 1980)
- Missouri City, TX (US) (1978 - 1999)
Company Filing History:
8 out of 3,161 
3 out of 48 
2 out of 49 
Years Active: 1976-1999
Title: The Innovative Contributions of Douglas G. Calvin
Introduction
Douglas G. Calvin is a notable inventor based in Missouri City, TX (US). He holds a total of 15 patents that showcase his expertise in valve technology. His inventions have significantly contributed to advancements in fluid control systems.
Latest Patents
Among his latest patents is the "Rotary Valve with Pressure Energized Seal." This invention features a valve element that is mounted within the flow path of a valve body and is rotatable about a stem axis. The design includes a peripheral seating surface that surrounds the flow path and is strategically spaced from the stem axis to ensure effective sealing when the valve is closed. The valve element is constructed with a rigid body and a peripheral resilient overlay, which contains a pressure-responsive sealing member. This member flexes in response to fluid pressure, creating a reliable seal against the seating surface. The invention is particularly advantageous for plug valves, providing dependable sealing even under high pressure differentials.
Another significant patent is the "Rotary Valve with Pressurized Energized Seal," which shares similar features and benefits as the previous invention. This design also emphasizes the importance of reliable sealing engagement between the valve element and the seating surface, ensuring optimal performance in various applications.
Career Highlights
Throughout his career, Douglas G. Calvin has worked with prominent companies such as Texaco Inc. and Keystone International Holdings Corporation. His experience in these organizations has allowed him to refine his skills and contribute to innovative projects in the field of valve technology.
Collaborations
Calvin has collaborated with notable individuals in his field, including Curtis E. Howard and Robert W. Pitts, Jr. These partnerships have fostered a creative environment that has led to the development of groundbreaking inventions.
Conclusion
Douglas G. Calvin's contributions to valve technology through his numerous patents highlight his innovative spirit and dedication to engineering excellence. His work continues to influence the industry and inspire future inventors.