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US 10,184,239 B2Granted
Covering consisting of a plurality of gratings inserted one into another
AssigneeACO Severin Ahlmann GmbH & Co. KG
InventorsArne Meincke, Hans-Julius Ahlmann
Life of this patent
Estimating the term…
Abstract
Covers for drains, manholes or similar constructions are known which comprise a first grate (10) made of sheet metal and comprising slots (11) and struts (12), said struts having top faces (13) and each strut having side faces (14, 14′) made of sheet metal bent with respect to the top face. In order to increase the rigidity it is proposed that at least a second grate (20) is provided, the struts (22) of which are inserted in the slots (11) of the first grate (10).
Claims8
Cover for drains or manholes, comprising:
- at least one first grate made of a first sheet of sheet metal and comprising slots and struts, said struts having top faces and each strut having at least one side face made of a portion of the first sheet of sheet metal which is bent with respect to the top face, the side face having downward-projecting edge rims having substantially vertical slots into which the side faces of the struts are hooked;
- and
- at least a second grate made of a second sheet of sheet metal and comprising slots and struts having top faces and each strut having at least one side face made of a portion of the second sheet of sheet metal which is bent with respect to the top face, the side face comprising support strips to support the struts, the struts of which are inserted in the slots of the first grate, wherein the struts of the grates are bent such that the top faces of said struts lie in one plane.
Cover for drains or manholes, comprising:
- at least one first grate made of a first sheet of sheet metal and comprising slots and struts, said struts having top faces and each strut having at least one side face made of a portion of the first sheet of sheet metal which is bent with respect to the top face, the side face having downward-projecting edge rims having substantially vertical slots into which the side faces of the struts are hooked;
- and
- at least a second grate made of a second sheet of sheet metal and comprising slots and struts having top faces and each strut having at least one side face made of a portion of the second sheet of sheet metal which is bent with respect to the top face, the side face comprising support strips to support the struts, the struts of which are inserted in the slots of the first grate wherein the first grate is connected to the second grate by interlocking to the second grate, and wherein the first grate is connected by edge folds to the second grate.
Cover for drains or manholes, comprising:
- at least one first grate made of a first sheet of sheet metal and comprising slots and struts, said struts having top faces and each strut having at least one side face made of a portion of the sheet metal which is bent with respect to the top face;
- and
- at least a second grate made of a second sheet of sheet metal and comprising slots and struts having top faces and each strut having at least one side face made of a portion of the second sheet metal which is bent with respect to the top face, the side face comprising support strips to support the struts, the struts of which are inserted in the slots of the first grate, wherein one of the grates has downward-projecting edge rims having substantially vertical slots into which the side faces of the struts are hooked.
Dependencies are inferred from the claim text.