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| Number | Title | Issue Date |
| 5916932 | Composite building materials from recyclable waste A composite building material is disclosed produced from recycled materials. The composite building material is composed of an extruded mixture of high density polyethylene and a thermoplastic coated fiber material such as fiberglass. The resulting materi... | 06/29/1999 |
| 5713518 | Railroad cross tie and track continuity detector systems A rail tie and track-tie connection includes a molded plastic body member having molded plastic cover pieces attached to the body member, with lip portions engaging and capturing bottom flanges on the track rails. The body member may be hollow with a fill... | 02/03/1998 |
| 5135164 | Prestressed concrete railroad tie A prestressed concrete railroad tie having a tie body made up of two end members for supporting rail attachment parts and a central section extending between and interconnecting the end members and having a transverse cross-section smaller than the transv... | 08/04/1992 |
| 5104039 | Railroad tie A railroad tie 10 is described. The tie includes elongated side surfaces 23 with a plurality of ballast locking indentations 34 formed therein. The indentations converge from open upward ends 35 to reduced bottom ends 36. The configuration of the locking ... | 04/14/1992 |
| 4349150 | Concrete sleeper with the fastening housing A fastening housing for a rail clamp comprising a carrier plate and a superstructure having cavities for accommodating an end part and a rail clamp, said carrier plate having substantially vertically directed anchoring members extending in a concrete slee... | 09/14/1982 |
| 4179067 | Railway track hold-down hardware A base member, such as a cross tie, is molded of reinforced concrete or wood chips and resin. Depressions in the top of the base member are lined with pads of cushion material to seat the flanges of the rails. A pair of hold-down clips is seated on each p... | 12/18/1979 |
| 4150790 | Reinforced molded lignocellulosic crosstie and railway assembly A reinforced railroad crosstie formed by molding and bonding comminuted lignocellulosic material into a monolithic beam around a plurality of reinforcing rods, each of which has a plurality of spaced protrusions fixedly attached along its length at specif... | 04/24/1979 |
| 4151145 | Latex-modified, pretensioned and prestressed structures having enhanced structural load bearing capacity This invention relates to a latex-modified, pretensioned, and prestressed concrete structure having at least about a 50% reduction in bond transfer length as compared to a structure not modified by a latex. Such structure is composed of a cured concrete c... | 04/24/1979 |
| 4141499 | Concrete railroad bed A cast concrete rail bed is provided which includes plural panels, each panel having a pair of longitudinally extending laterally spaced rail-supporting pedestals, with a connector between them, and each having a rail-receiving slot in its top. Each pedes... | 02/27/1979 |
| 4108377 | Non-metallic-reinforced molded crosstie A reinforced railroad crosstie formed by molding and bonding comminuted lignocellulosic material into a monolithic beam around a plurality of wooden reinforcing members which have relatively clear and straight grain, a high modulus of rupture and a high m... | 08/22/1978 |
| 4098460 | Concrete unit prestressed using tendons stressed before concreting, more particularly a railway sleeper A long concrete unit, prestressed by tendons tensioned before concreting, at least one section of which, near the end of the said unit, is submitted to maximum loads, characterized by the fact that at least one improved-bond prestressing tendon is surroun... | 07/04/1978 |
| 4034913 | Composite railroad tie An improved railroad tie constructed of a metal sheath with angled walls braced longitudinally, vertically, and laterally and reinforced by a filling of concrete, the sheath structure being especially adapted for spring-type rail securing devices bridging... | 07/12/1977 |
| 3994436 | Composite railway tie The composite railway tie has performances which are substantially improved over those of ties of the prior art while it results in a saving in weight of metal necessary and in the cost of manufacture. The reinforcement of this tie comprises a lower assembly a... | 11/30/1976 |
