plastic railing ties patents

Patent US6336265 - Composite railroad cross tie and method of ...A composite railroad cross tie supporting railroad track rails on a ballast or concrete roadbed is provided comprising an elongated wooden core, an end cap positioned over each end of the core and an outer shell or coating. The wooden core consists of virgin or recycled natural wood or of man made engineered wood such as oriented strand board (OSB), plywood, and the like. The outer coating can consist of virgin or recycled thermoplastic, thermoset resin, and/or rubber, with or ...

Patent US5238734 - Railroad ties made of recycled tire fragments ...A number of patents state that items made from recycled tire fragments can be used as railroad tie pads. Railroad tie pads are not the same as railroad ties. A railroad tie (also called a cross-tie) is a large piece of wood, usually about 7 by 9 inches (about 18 by 23 cm) thick and about 8 feet (2.5 meters) long; each railroad tie rests beneath both rails on a railroad track. By contrast, a tie pad is a much smaller flat piece which is almost square and which rests beneath a single steel rail, ...

Patent US7690584 - Fastener for supporting railroad ties - Google ...6 Apr 2010 ... A fastener for supporting a rail on a railroad tie using clips, includes an abrasion plate having an upper surface, and being constructed and arranged to fit on the railroad tie; a rail pad having a lower surface and being constructed and arranged to fit on said abrasion ... The basic design of this feature is a protruding plastic post which is provided on one of the components of the fastener and is dimensioned to fit through corresponding holes in the other components.

Patent US8132792 - Temporary guard rail support - Google Patents13 Mar 2012 ... Each guard rail support comprises an attachment base having quick fastening means for quick attachment and release of the support to a ground surface of the site under construction, a plurality of rail supports having quick fastening means for quick attachment and release of the wooden guard rails and a fall-protection or tarp tie-off ring. Advantageously, a portable and lightweight guard rail assembly may be constructed with the guard rail supports in an expedient ...

Composite Rail Tie - Industrial WoodOur rail ties patented technology mixes recycled landfill-bound plastic to create composite rail ties that far exceed industry standard wooded and concrete ties, because of our high consistency and structural integrity. The components of our composite rail ties formulation includes cross-linked polyethylene, an extremely tough plastic. The plastic mixture is then fed into the patented equipment for processing and delivered into molds. Once removed from the mold, we inspect, measure, ...

Patent US8727228 - Structure for railroad ties having data ... - Google20 May 2014 ... The most significant problems with the plastic ties themselves include the flex behavior of the crosstie beam and they do not securely retain spikes used to attach rails to the ties nearly as effectively as wooden ties. The flex behavior adversely affects rail performance and displaces ballast requiring more frequent inspection and maintenance. Although spikes can be driven into plastic ties, the low frictional cohesion between metal spikes and plastic ties causes driven ...

Patent US5096119 - Rail fastening on concrete ties by means of ...17 Mar 1992 ... The fastening parts are regarded as being the intermediate layer between the rail and the concrete tie, the angled guide plates, the tension clamps, the tie screws as well as the plastic dowels which are inserted in the concrete tie for the tie screws. A suitable angled guide plate for HM rail fastening is described e.g. in DE-OS 32 43 895 of the applicant. Practically since the beginning of HM fastening for the Deutsche Bundesbahn (cf. e.g. ETR 1968, p. 101) until today ...

Patent US5952072 - Method for restoring used railroad ties and the ...14 Sep 1999 ... A method for restoring at least one means defining a railroad spike hole located in a used railroad tie, so that the restored railroad tie can be reused in subsequent rail replacement operations, said restored railroad tie, after formation ..... 4,295,259 patent. U.S. Pat. No. 4,134,546 is directed to a cylindrical insert of cellular plastic which is introduced into a wooden rail support structure. The insertion process is accomplished by boring a hole into the wooden structure.

They've Been Working on the Railroad : Plastics TechnologyHe pegs the production total at only around 225,000 composite ties in the past two years, vs. a concrete tie market of 1 million ties a year. Either there will be a breakthrough, or we will see a couple more years of developmental ties here and there. The history of composite RR ties is rife with start-up technology companies that promised too much too early, issuing press releases every time they shipped a few samples. Today, out of perhaps a dozen companies that won patents, ...

Patent US4885888 - Insulating non-removable type concrete wall ...12 Dec 1989 ... A synthetic plastic wall tie of variable lengths for use with concrete forms. The tie has a pair of T-shaped end sections at its opposite ends. Each of the T-shaped end sections including a stem having a sufficient thickness for receiving an end of a screw in threaded engagement therewith. The T-shaped end sections have parallel cross pieces at opposite ends of the tie. An intermediate wall tie section connects the T-shaped end sections together. The intermediate wall ...

Patent US8387216 - Tie wrap for bundling objects - Google Patents5 Mar 2013 ... The plastic or paper coating is not bonded to the wire and may be easily removed. Also, the coating provides little grip to the object on which the twist tie is wrapped. The coating does not grip itself well either. U.S. Pat. No. 6,113,170 shows a wrap for bundling objects that includes a wire covered by a flexible tube, but there is no bonding between the wire and the tube. The invention of that patent also lacks a surface which enhances grip of the wrap when it is wrapped ...

Patent US3834620 - Precast railroad tie and tie plate - Google PatentsThe rail plates in one form have a pair of L-shaped anchor and reenforcing rods welded to each of the gage and field sides of the tie plate, with portions of the rods having substantial longitudinal length to supplement other reenforcing rods molded ... Heretofore there have been various reenforced concrete or plastic railroad cross-ties proposed some of which have embodied molded-in-place anchor bolts or combination reenforcing rods and anchor bolts such as disclosed in US Pat.

Patent US6863855 - Method of making a cable tie using insert ...8 Mar 2005 ... Patent Ding. Previous page. Next page. Claims(12). 1. A method of making a cable tie, said method comprising the steps of: (a) forming a strap, said strap having a front end and a tail, said forming step comprising forming a .... In addition, because cable tie molds typically have only a single gate through which molten plastic is injected (to prevent the occurrence of knit linesespecially in those instances in which nylon is the molten plastic used), the cycle time can ...

Patent US7774905 - Element of a cable tie strap - Google Patents17 Aug 2010 ... A pair of clamping rails preferably provides a complete