is now patented, the number is US 8,357,064 B1. The patent includes all open barreled chain sprockets.


Loyd Fery, owner/operator of D & L Chain Inc. near Stayton, Ore., with a new sprocket he designed. AUMSVILLE, Oregon: A new, patented  sprocket developed near here is catching on quickly with owners of live bottom trailers and spreaders with pintle chain systems.That includes just about any truck or trailer that moves farm products and is unloaded out the back.  

The reason for the rash of breakages is that live bottom trailers and spreaders are getting longer and putting more stress on the standard ANSI   (American National Standards Institute) pintle chains sprocket and more torque and stress on the chain.  

Trailer lengths are taking their toll on ANSI pintle chains rather quickly. Some of them (the chains) last only few weeks. This has been going on for some time. 

What makes D & L's new sprockets so unique and worthy of the large expense Fery has to patent them is that they are designed so that chain pins, the weakest links in the chain, are relieved of the stress that forces them to break.. 

The pressure was taken off of the pins by widening the distance, and root diameter, between the sprocket teeth, and also by enlarging the diameter of the sprockets. In addition, Fery has redesigned the sprocket teeth, making them smaller to minimize wear and tear. 

When they started using longer (trailer) beds, the standard chain sprockets were only pulling with one tooth, maybe two, at a time.  (The D & L) sprockets are set up so that more of the teeth are engaged at the same time. 

On a new D & L  Power Tooth™ sprocket, a minimum of four and a half sprocket teeth are engaged at the same time. The new sprockets are available in sizes six to 12 teeth.

 With standard sprocket/chain assemblies, when the chain kicks off at the bottom of the rotation as its being pulled over the sprocket tooth, the chain backlashes and breaks the pin. The backlash is caused by old designs and slack in the chain.

 Standard ANSI sprockets and chains performed well on trailers that measured only 16 feet, Fery said, but now they manufactured them from 36 to 53 feet.

 The new D & L sprockets cost more than standard ANSI sprockets, but the price is worth it. They are made out of better steel that most people do, and they're heat treatable.

Depending on use, D & L sprockets, will last longer than the normal lifespan of ANSI sprockets, to increase life, at minimal additional cost.

The new design, which has been added to D&L sprocket line, that  has been selling for years, has been in use on farm trailers since February, 2008 with no problems.

D & L  recently sold a very large order  to a live-bottom Ag trailer manufacturer in Nebraska. "That will take care of them for awhile", he said. Those same sprockets are being shipped all over the country.

The sprockets are manufactured at D&L, just west of Stayton, and available now through D&L. Fery said he has the sprocket design where we need to be, and won't be making any more modifications".

Fery has a patent for the new sprockets in the USA.

The new sprockets have been sold into other countries through the Nebraska trailer manufacture. (OEM).

 The new sprockets will be distributed and used all over the world. They'll be used all over because they can be used to haul anything from manure to grains to silage to whatever. A 36 wheel trailer in Michigan uses the new Sprockets very successfully.

 D & L Chain Specialties was established in 1980 by the Loyd Fery Family. The company specializes in chains, bearings, sprockets, pulleys, and cable for agriculture and industry.

In July of 08 the name was changed to D&L Chain Inc.

The Fery family was also in the news for the hydro-electric plant they installed on the farm in 1980.

 For more information contact D & L Chain Inc. on the new sprockets, or go to or call (503) 769-7992; toll free (800) 772-7992

Fax (503) 769-4092