Global Patent Index - EP 3722246 A1

EP 3722246 A1 20201014 - TELESCOPIC CRANE BOOM SECTION, TELESCOPICALLY EXTENSIBLE CRANE BOOM AND HYDRAULIC CRANE

Title (en)

TELESCOPIC CRANE BOOM SECTION, TELESCOPICALLY EXTENSIBLE CRANE BOOM AND HYDRAULIC CRANE

Title (de)

TELESKOPISCHE KRANAUSLEGERABSCHNITT, TELESKOPISCH AUSFAHRBARER KRANAUSLEGER UND HYDRAULIKKRAN

Title (fr)

SECTION DE FLÈCHE DE GRUE TÉLESCOPIQUE, FLÈCHE DE GRUE TÉLESCOPIQUEMENT EXTENSIBLE ET GRUE HYDRAULIQUE

Publication

EP 3722246 A1 20201014 (EN)

Application

EP 20163786 A 20200318

Priority

SE 1950438 A 20190408

Abstract (en)

A telescopic crane boom section having an elongated main body in the form of a straight tubular beam (30), which is formed by one single bent metal sheet and consists of wall portions (W1-W12) connected to each other via bending corners (33), wherein:- a neutral layer (37) of the tubular beam extends across lateral wall portions (W1, W2) on either side of a vertical plane of symmetry (36) of the tubular beam;- the tubular beam has planar upper and lower wall portions (W3, W8), which are perpendicular to the vertical plane of symmetry and connected to each one of said lateral wall portions via intermediate wall portions; and- opposite longitudinal edges of the metal sheet are joined to each other by a welding joint (35) located at an upper or lower edge of one of said lateral wall portions.The invention also relates to a crane boom and a crane comprising such a crane boom section.

IPC 8 full level

B66C 23/68 (2006.01); B66C 23/70 (2006.01)

CPC (source: AT EP)

B66C 23/701 (2013.01 - AT EP)

Citation (applicant)

CA 2697304 A1 20090312 - PALFINGER AG [AT]

Citation (search report)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

DE 202020101893 U1 20200429; AT 17304 U1 20210915; EP 3722246 A1 20201014

DOCDB simple family (application)

DE 202020101893 U 20200407; AT 500712020 U 20200401; EP 20163786 A 20200318