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US 8,146,507 B2Granted
Laser-welded crane rail for suspended crabs
AssigneeKonecranes PLC
InventorWilfried Hess
Life of this patent
Estimating the term…
Abstract
Disclosed is a crane rail made from a roll-formed steel sheet strip. Said crane rail altogether comprises a top flange and a bottom flange. A support flange that has a triangular cross-section is additionally embodied on the top flange. The edges of the steel strip are laser-welded to the web.
Claims31
A crane rail for suspended crabs comprising:
- a bottom flange in the form of a hollow chamber that extends a length of the crane rail with a constant cross section and forms travel surfaces for wheels of the suspended crabs on an upper side of the bottom flange;
- a first web that is aligned vertically upward in a normal operating position and originates from a center of the bottom flange;
- a top flange in the form of a hollow chamber that extends the length of the crane rail with a constant cross section and is connected to the bottom flange by the first web;
- a second web that is aligned vertically upward in the normal operating position and originates from a center of the top flange;
- and
- a support flange from which the crane rail may be suspended in the form of a hollow chamber that extends the length of the crane rail with a constant cross section that is connected to the top flange by means of the second web;
- said crane rail being configured in a single piece from a roll-formed sheet steel strip with two continuous longitudinal strip edges, said bottom flange, top flange, and support flange hollow chambers each defining closed chambers without any longitudinal opening from the respective chamber extending the length thereof,
- said strip edges being fixedly secured by welding to the sheet steel strip along or adjacent the strip edges, and
- at least two of said closed chamber defining flanges being free of seams defined by said strip edges.
6 more elements
A crane rail for suspended crabs comprising:
- a bottom flange in the form of a hollow chamber that extends a length of the crane rail with a constant cross section and forms travel surfaces for wheels of the suspended crabs on an upper side of the bottom flange;
- a first web that is aligned vertically upward in a normal operating position and originates from a center of the bottom flange;
- a top flange in the form of a hollow chamber that extends the length of the crane rail with a constant cross section and is connected to the bottom flange by the first web;
- a second web that is aligned vertically upward in the normal operating position and originates from a center of the top flange;
- and
- a support flange from which the crane rail may be suspended in the form of a hollow chamber that extends the length of the crane rail with a constant cross section that is connected to the top flange by means of the second web;
- said crane rail being configured in a single piece from a roll-formed sheet steel strip with two continuous longitudinal strip edges, said bottom flange, top flange, and support flange hollow chambers each defining closed chambers without any longitudinal opening from the respective chamber extending the length thereof,
- said strip edges being fixedly secured by welding to the sheet steel strip, and
- said closed chamber defining bottom, top, and support flanges each being free of seams defined by said strip edges.
6 more elements
A crane rail for suspended crabs comprising:
- a bottom flange in the form of a hollow chamber that extends a length of the crane rail with a constant cross section and forms travel surfaces for wheels of the suspended crabs on an upper side of the bottom flange;
- a first web that is aligned vertically upward in a normal operating position and originates from a center of the bottom flange;
- a top flange in the form of a hollow chamber that extends the length of the crane rail with a constant cross section and is connected to the bottom flange by the first web;
- a second web that is aligned vertically upward in the normal operating position and originates from a center of the top flange;
- and
- a support flange from which the crane rail may be suspended in the form of a hollow chamber that extends the length of the crane rail with a constant cross section that is connected to the top flange by means of the second web;
- said crane rail being configured in a single piece from a roll-formed sheet steel strip with two continuous longitudinal strip edges, said bottom flange, top flange, and support flange hollow chambers each defining closed chambers without any longitudinal opening from the respective chamber extending the length thereof,
- said strip edges being fixedly secured by welding to the sheet steel strip,
- said web each being formed by two adjacent layers of said sheet steel strip free of strip edges of the sheet steel strip,
- said closed chamber defining top and bottom flanges being free of seams defined by said strip edges, and
- said strip edges each being welded together to define a welded seam that extends longitudinally parallel the center of the support flange.
8 more elements
Dependencies are inferred from the claim text.