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The Arnold Company is the number one Railcar Gate Door Opener manufacturer in the United States. As home of the Door Demon® Railcar Hopper Gate Door Opener, we specialize in making custom designed Railcar Gate Door Openers to meet the specific needs of your working environment! We also carry a full line of Industrial Vibrators.

We take pride in our product selection, product quality, and personalized customer service! We offer our customers affordable, practical solutions to their Railcar Gate Door Opener needs and stand behind our products!


About The Arnold Company......

When Arnold Huelsmann started his company there was one focus: the customer. This has never changed and we pride ourselves on best in class customer service. Our 40+ years of experience is still being translated into our new products and solutions.

Unlike any of our competitors, our single focus on railcar door opening has provided us with the largest product offering available. Our willingness to work onsite with customers to meet their unique needs, and do so at a reasonable cost, has provided total customer satisfaction. We pride ourselves in solving problems when other off- the- shelf solutions would not work. We also work with any power source and physical configuration that you prefer and do not push one single line. We never try to lose the voice of the customer as our guidance or we would all lose.

Our offering of products for Hopper Gates, Pressure Discharge Valves, and Freight Car Doors has given us the privilege to serve almost every industry on rails. Not only do we serve the Americas, but International locations as well. We stand ready to serve you, our next new partner.


Meet the Staff of The Arnold Company
Arnold Huelsmann, President and Owner
Arnold Huelsmann
President and Owner
Years of Service: 25+ years

Deke Busch, General Manager
Deke Busch
Vice President and General Manager
Years of Service: 5 years

Donna Hosto, Office Manager
Donna Hosto
Office Manager
Years of Service: 11 years

Jerome Ripperda, Assembly Manager and Hydraulic Specialist
Jerome "Rip" Ripperda
Assembly Manager and Hydraulic Specialist
Years of Service: 10+ years

Jon Ripperda, Lead Fabricator
Jon Ripperda
Lead Fabricator
Years of Service: 2+ years

Diane Warnecke, Bookkeeper
Diane Warnecke
Bookkeeper
Years of Service: 3+ years

Bill Curtis: Director, IT and Marketing
Bill Curtis
Vice President, IT and Marketing
Years of Service: 3+ years

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