# US 10,370,230 B2 · Lifting mast of an industrial truck > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,370,230 B2 - Document ID: US10370230B2 - Status: Granted - Kind: B2 - Application number: 15/348,532 - Filed: 2016-11-10 - Published: 2017-05-11 - Granted: 2019-08-06 - Earliest claimed: 2015-11-11 - Assignees: Linde Material Handling GmbH - Applicants: Linde Material Handling GmbH - Inventors: Holger Aulbach; Steffen Geissler; Stephen Schmidt; Heiko Eizenhöfer; Johannes Hössbacher - Web page: https://patentgrep.com/patent/US10370230B2 ## CPC - B66F 9/08: Masts; Guides; Chains - B66F 9/22: Hydraulic devices or systems - B66F: HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD ({invalid lifting devices A61G7/10; } mounting artificial islands on piles or like supports E02B17/00; scaffolding combined with lifting devices E04G1/22; lifting devices for sliding forms E04G11/24; lifting of buildings E04G23/06; shores or struts E04G25/00; lifts or other hoisting devices on ladders E06C7/12; props for mining E21D15/00) ## Abstract A lifting mast of an industrial truck includes two vertical rails at a distance from each other that are connected with one another by two cross members, wherein the lifting mast, to raise and lower a lifting carriage on the vertical rails, is provided with a lifting cylinder device which is supported on the bottom cross member, wherein the lifting cylinder device is in an operational connection with a lifting arrangement that is fastened with a first end to the lifting carriage, is fastened with a second end to the lifting mast, and is reversed on the lifting cylinder device. The second end of the lifting arrangement is fastened to the bottom cross member, or the lifting arrangement is fastened with the second end to the additional cross member, wherein at least one traction device that transmits a tractive force connects the additional cross member with the bottom cross member. ## Claims ### Claim 1 A lifting mast of an industrial truck comprises: two vertical rails at a lateral distance from each other that are connected with one another by at least two cross members, wherein one of the two cross members is a bottom cross member that is located in a bottom area of the vertical rails and at least one additional cross member is provided at a distance from the bottom cross member in a vertical direction of the lifting mast, wherein a lifting carriage that is displaceable longitudinally and is provided with load handling means is located on the vertical rails, and the lifting mast, to raise and lower the lifting carriage on the vertical rails, is provided with a lifting cylinder device that is supported on the bottom cross member, wherein the lifting cylinder device is in an operational connection with a lifting arrangement that is fastened with a first end to the lifting carriage, is fastened with a second end to the lifting mast, and is reversed on the lifting cylinder device, wherein the second end of the lifting arrangement is fastened to the bottom cross member, or wherein the lifting arrangement is fastened with the second end to the additional cross member, wherein at least one traction device that transmits a tractive force is provided to connect the additional cross member with the bottom cross member, and wherein the at least one traction device comprises two traction devices oriented in a transverse direction of the lifting mast symmetrically with reference to a fastening point of the lifting arrangement on the additional cross member. ### Claim 2 (depends on 1) The lifting mast as recited in claim 1, wherein a fastening point of the lifting arrangement on the additional cross member and a fastening point of the at least one traction device on the additional cross member are aligned in a transverse direction of the lifting mast. ### Claim 3 (depends on 1) The lifting mast as recited in claim 1, wherein a contact surface of the lifting cylinder device is located on a side of the bottom cross member facing the lifting carriage, and a fastening point of the lifting arrangement or a fastening point of the at least one traction device is located on the bottom cross member on a side of the bottom cross member facing away from the lifting carriage. ### Claim 4 (depends on 1) The lifting mast as recited in claim 1, wherein the at least one traction device that transmits a tractive force is located between the vertical rails of the lifting mast. ### Claim 5 (depends on 1) The lifting mast as recited in claim 1, wherein the at least one traction device that transmits a tractive force is in the form of a cable, a belt or a chain. ### Claim 6 (depends on 1) The lifting mast as recited in claim 1, wherein the at least one traction devices that transmits a tractive force is a preformed metal section. ### Claim 7 (depends on 6) The lifting mast as recited in claim 6, wherein the preformed metal section is a connecting rod, a threaded rod, a metal tube, a steel bar, or a preformed metal section. ### Claim 8 (depends on 1) The lifting mast as recited in claim 1, wherein the at least one traction device that transmits a tractive force is connected with the bottom cross member, the additional cross member, or the bottom cross member and the additional cross member by a threaded connection. ### Claim 9 (depends on 1) The lifting mast as recited in claim 1, wherein the at least one traction device that transmits a tractive force is connected with the bottom cross member, the additional cross member, or the bottom cross member and the additional cross member by a welded connection. ### Claim 10 (depends on 9) The lifting mast as recited in claim 9, wherein a weld seam preparation for the weld connections is performed on the bottom cross member, the additional cross member, or the bottom cross member and the additional cross member. ### Claim 11 (depends on 1) The lifting mast as recited in claim 1, wherein the lifting cylinder device is fastened to the additional cross member. ### Claim 12 (depends on 1) The lifting mast as recited in claim 1, wherein the lifting cylinder device is located between the vertical rails. ### Claim 13 (depends on 1) The lifting mast as recited in claim 1, wherein the additional cross member is X-shaped. ### Claim 14 (depends on 1) The lifting mast as recited in claim 1, wherein the lifting arrangement is a lifting chain, a lifting belt, or lifting cable. ### Claim 15 A lifting mast of an industrial truck comprises: two vertical rails at a lateral distance from each other that are connected with one another by at least two cross members, wherein one of the two cross members is a bottom cross member that is located in a bottom area of the vertical rails and at least one additional cross member is provided at a distance from the bottom cross member in a vertical direction of the lifting mast, wherein a lifting carriage that is displaceable longitudinally and is provided with load handling means is located on the vertical rails, and the lifting mast, to raise and lower the lifting carriage on the vertical rails, is provided with a lifting cylinder device that is supported on the bottom cross member, wherein the lifting cylinder device is in an operational connection with a lifting arrangement that is fastened with a first end to the lifting carriage, is fastened with a second end to the lifting mast, and is reversed on the lifting cylinder device, wherein the second end of the lifting arrangement is fastened to the bottom cross member or wherein the lifting arrangement is fastened with the second end to the additional cross member, wherein at least one traction device that transmits a tractive force is provided to connect the additional cross member with the bottom cross member, and wherein the at least one traction device that transmits a tractive force is located inside a transverse dimension of the lifting cylinder device.