Stephen M Kuhn

US Patent:

62240234, May 1, 2001

Filed:

Jan 22, 1999

Appl. No.:

9/235892

Inventors:

Keith Young - Naperville IL
Stephen R. Kuhn - Richton Park IL

Assignee:

ABC Rail Products Corporation - Chicago IL

International Classification:

E01B 710

US Classification:

246454

Abstract:

An improved railroad trackwork spring wing frog is provided with a rail-closer having a single compression spring whose reaction forces are applied to the frog spring wing rail through movable linkages that are each connected to the spring wing rail at different spaced-apart position and that each abut the single compression spring.

US Patent:

62867911, Sep 11, 2001

Filed:

Mar 9, 2000

Appl. No.:

9/521338

Inventors:

Keith Young - Naperville IL
Stephen R. Kuhn - Richton Park IL

Assignee:

ABC-NACO Inc. - Downers Grove IL

International Classification:

E01B 700

US Classification:

246382

Abstract:

An improved railroad trackwork spring wing frog assembly having a selectively releasable hold-open subassembly for the spring wing rail is provided with a combined compressible shock absorber and compression spring that are functionally connected to the assembly spring wing rail and to the assembly base plate, and that function to generate an opposing force in connection with opening movement of the spring wing rail and an augmented force in connection with closing movement of the spring wing rail.

US Patent:

62766422, Aug 21, 2001

Filed:

Mar 9, 2000

Appl. No.:

9/521339

Inventors:

Keith Young - Naperville IL
Stephen R. Kuhn - Richton Park IL

Assignee:

ABC-NACO Inc. - Downers Grove IL

International Classification:

B61K 1300

US Classification:

246276

Abstract:

A railroad trackwork frog assembly is provided with a base plate, a spring wing rail supported by and movable laterally relative to the base plate, and a hold-down subassembly attached to the spring wing rail and to the base plate, the hold-down subassembly comprising, in combination with a horn housing, a horn element having a cross-section area moment of inertia about a transverse horizontal axis intersecting the cross-section area center of gravity that is smaller than the cross-section area moment of inertia about a transverse vertical axis intersecting the cross-section area center of gravity.

US Patent:

58458816, Dec 8, 1998

Filed:

Aug 29, 1997

Appl. No.:

8/920777

Inventors:

Keith Young - Naperville IL
Stephen R. Kuhn - Richton Park IL
Joan Q. Xia - River Forest IL
Thomas S. Baker - Columbus OH

Assignee:

ABC Rail Products Corporation - Chicago IL

International Classification:

E01B 700

US Classification:

246457

Abstract:

A railroad trackwork intersection assembly such as a crossing intersection or a turnout intersection is provided with at least one flange-bearing frog subassembly which has railcar wheel flangeways of uniform depth throughout the frog planform that co-operate with trackwork traffic rails, with easer subassemblies that are positioned exterior to but abut the frog subassembly, that have sloping flange support surfaces, and that may be removed from or adjusted in the assembly without moving or adjusting either the frog subassembly or the co-operating trackwork traffic rails.

US Patent:

61586978, Dec 12, 2000

Filed:

Feb 17, 1999

Appl. No.:

9/251620

Inventors:

Keith Young - Naperville IL
Stephen R. Kuhn - Richton Park IL

Assignee:

ABC Rail Products Corporation - Chicago IL

International Classification:

E01B 700

US Classification:

246382

Abstract:

A railroad frog assembly is provided with a spring wing rail latch holdback subassembly that continuously retains the spring wing rail in a spring wing rail fully open position when activated by the wheels of a railcar traversing the frog assembly, and that automatically deactivates the latch holdback subassembly and releases the spring wing rail from retention in an open condition and for complete closing after the last railcar wheel has passed through the frog assembly.

US Patent:

58102981, Sep 22, 1998

Filed:

May 1, 1997

Appl. No.:

8/848803

Inventors:

Keith Young - Naperville IL
Stephen R. Kuhn - Richton Park IL

Assignee:

ABC Rail Products Corporation - Chicago IL

International Classification:

E01B 714

US Classification:

246276

Abstract:

An improved railroad trackwork spring wing frog assembly is provided with multiple rail-closer subassemblies, preferably of the nested and counter-wound compression spring-type, that co-operate with the assembly spring wing rail, and that are laterally spaced-apart with respect to each other along the angled rail portion of the frog assembly spring wing rail.

US Patent:

58068104, Sep 15, 1998

Filed:

Dec 1, 1997

Appl. No.:

8/980569

Inventors:

Kieth Young - Naperville IL
Stephen R. Kuhn - Richton Park IL

Assignee:

ABC Rail Products Corporation - Chicago IL

International Classification:

B61L 1100
E01B 714

US Classification:

246276

Abstract:

A railroad frog assembly is provided with a switched magnet that immediately retains a frog flexible wing rail in its open position in response to a railcar wheel passing through the frog assembly, and that delayably releases the frog flexible wing rail from its open position for subsequent closure by an included frog compression spring.