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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!


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Arnold Company Door Opener Products are proudly produced in the U.S.A.






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Our Research and Development Process
idea icon Idea: Conceptual Engineering Drawing
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Manual Bully Idea: Hover Mouse Pointer for Larger Image Wheel Mounted Manual Plug Door Opener
This conceptual drawing is of a new unit we are currently developing. It is is a manual opener for plug doors mounted on four wheels for easy maneuvering in any working environment. The two front wheels will be set in a locked positions while the rear wheels will swivel to provide for easy movement.
prototyping icon Prototyping: Putting the Idea Together
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Sideshift Prototype: Hover Mouse Pointer for Larger Image Door Demon® Frame
This picture is a "fit & function" mock-up during the development of the side shift add-on option.
click here to learn more about this Door Demon®
Sideshift Prototype: Hover Mouse Pointer for Larger Image Door Demon® Frame
Double-checking dimensions to ensure proper balance and wheel alignment.
click here to learn more about this Door Demon®
Portable Winch Prototype: Hover Mouse Pointer for Larger Image Portable Winch Freight Car Opener
Changes and modifications are just a normal part of the development process and the upgrading of equipment.
click here to learn more about the Portable Winch
testing icon Testing: Engineering in Motion
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Fitting and stress testing components and assemblies is key to the quality and dependability of the finished products. Depicted below is a series of testing conducted during the development of the Double "DR" Winch.
Double 'DR' Winch Prototype: Hover Mouse Pointer for Larger Image Double "DR" Winch Freight Car Opener
<-  Rope Testing
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Double 'DR' Winch Prototype: Hover Mouse Pointer for Larger Image Double "DR" Winch Freight Car Opener
<-  Component Testing
click here to learn more about the Double Winch
Double 'DR' Winch Prototype: Hover Mouse Pointer for Larger Image Double "DR" Winch Freight Car Opener
<-  Winch Testing
click here to learn more about the Double Winch
finished product icon Finished Product: Empowering YOU, our Customer
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Finished Double 'DR' Winch: Hover Mouse Pointer for Larger Image Double "DR" Winch Freight Car Opener
The Double "DR" Winch features dual winches and employs high-strength, low-stretch syntehic rope to alleviate the possibility of fraying and whiplash that a steel cable has.
click here to learn more about the Double Winch
Finished Loaded Door Demon: Hover Mouse Pointer for Larger Image Loaded Door Demon® Hopper Gate Door Opener
This electric Demon with optional hydraulic vertical lift and side shifting wheels is our most popular and innovative model. We use a Lesson brand motor in both 3-phase and 1-phase applications.
click here to learn more about this Door Demon®
Finished Demon Stick with Cart: Hover Mouse Pointer for Larger Image Manual Door Demon® Stick Hopper Gate Door Opener
The manual "Demon Stick" has been a great addition to our line of hopper gate door openers. It is pictured at left with it's optional two-wheel cart.
click here to learn more about this Door Demon®
  
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