Railways: surface track – Rails
Reexamination Certificate
2001-02-27
2002-10-29
Morano, S. Joseph (Department: 3617)
Railways: surface track
Rails
Reexamination Certificate
active
06471138
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATIONS
Applicants claim priority under 35 U.S.C. §119 of German Application No. 198 47 790.2 filed Oct. 16, 1998. Applicants claim priority under 35 U.S.C. §120 of PCT/DE99/03217 filed Oct. 6, 1999. The international application under PCT article 21 (2) was not published in English.
DESCRIPTION
The invention relates to a rail system consisting of
a grooved rail comprising a rail head, a rail stem and a rail foot, whereby a base profile made of an elastomeric material is arranged underneath the foot of the rail in most cases, as well as rail tie bars which are preferably provided with a profile encasing the rail tie bars, said profile being made of an elastomeric material;
a driving track made of concrete or other construction materials (for example such as stone pavements), with an integrated joint space for receiving the grooved rail;
a packing body made of elastomeric material, said packing body being arranged on both sides of the grooved rail and, with adaptation to the contour of the rail, completely filling the remaining space of the joint;
a fixture for securing the rail; as well as
an electrical insulation.
A rail system using a grooved rail, as it can be found in communal traffic, is described, for example in the published patent documents DE-A-33 45 388; DE-U-84 12 347; WO-A-95/30796; and WO-A-96/13636.
It is furthermore known from patent application EP-A-0 726 359 that the fixture for securing the rail comprises an electrically insulating dowel, whereby the head of the fixture is separated from the foot of the rail and the sub-construction by electrically insulating intermediate layers.
Furthermore, a rail system is introduced in patent specification U.S. Pat. No. 5,464,152, in conjunction with which the rail is encased with an elastomeric material that insulates the rail electrically at the same time.
Based on the overall prior art cited above, the problem of the invention consists in providing a rail system, in conjunction with which the leakage current component and the corrosion caused by voltage are minimized within the framework of communal traffic, whereby a superior deformation capability, a compact tie-up to the road construction material (which is particularly important in conjunction with stone pavements), increased damping of the rail as well reduced emission of noise are to be assured at the same time.
Said problem is solved according to the characterizing part of patent claim 1 in that
the packing body is provided on both sides of the grooved rail with an electrical insulation which is on each side a thin insulation layer as compared to the packing body, such a packing body extending on each side from the surface of the driving track up to the foot of the rail.
Based on the state of the art of a rail system of such a type, as it is described, for example in the published patent documents DE-A-33 45 388; DE-U-84 12 347; WO-A-95/30796; and WO-A-96/13636, the problem of the invention is to provide a rail system in conjunction with which higher deformation capabability, a compact tie-up to the road construction material (which is very important especially in conjunction with stone pavements), increased damping of the rail, as well as a reduction of the emission of noise are assured within the framework of the communal traffic. Furthermore, the goal is to reduce the leadage current component and the corrosion caused by the voltage.
Said problem is solved according to the characterizing part of patent claim
1
in that
the packing body, once it has been adapted to the contour of the rail, completely fills the remaining gap of the joint, and is provided with an electrical insulation.
Useful further developments of the rail system as defined by the invention are specified in claims 4 to 21.
A further problem of the invention is to provide a method for producing the rail system according to the invention that assures simple and also efficient installation of the packing body.
Said problem is solved according to the characterizing part of claim 22 in that
the packing body is pressed against the rail on both of its sides by means of a clamping device comprising a frame with clamping jaws, whereby at least one clamping jaw can be adjusted.
A useful step of the method is specified in claim 23.
REFERENCES:
patent: 4793545 (1988-12-01), Raymond
patent: 5464152 (1995-11-01), Wabnitz
patent: 5622312 (1997-04-01), Martin
patent: 84 12 347.8 (1984-07-01), None
patent: 33 45 388 (1985-06-01), None
patent: 42 23 270 (1994-01-01), None
patent: 0 726 359 (1996-08-01), None
patent: 0 863 256 (1998-09-01), None
patent: WO95/30796 (1995-11-01), None
patent: WO96/13636 (1996-05-01), None
Blank Helmuth
Höft Heiko
Pahl Bernd
Collard & Roe P.C.
McCarry, Jr. Robert J.
Morano S. Joseph
Phoenix Aktiengesellschaft
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