# US 8,540,092 B2 · Hoisting crane with annular bearing structure

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,540,092 B2
- Document ID: US8540092B2
- Status: Granted
- Kind: B2
- Application number: 12/523,499
- Filed: 2008-01-17
- Published: 2010-02-25
- Granted: 2013-09-24
- Earliest claimed: 2007-01-17
- Assignees: Itrec B.V.
- Applicants: Joop Roodenburg; Gerrit Van Wijk; Adriaan Jan Rodenburg
- Inventors: Joop Roodenburg; Gerrit Van Wijk; Adriaan Jan Rodenburg
- Web page: https://patentgrep.com/patent/US8540092B2

## CPC

- B66C 23/52: Floating cranes (floating dredgers E02F)
- B66C 23/84: Slewing gear (anti-friction bearings F16C)
- F16C 19/381: {with at least one row for radial load in combination with at least one row for axial load}
- F16C 19/505: {with the diameter of the rolling elements of one row differing from the diameter of those of another row}
- F16C 33/60: divided {or split, e.g. comprising two juxtaposed rings}
- F16C 2300/14: Large applications, e.g. bearings having an inner diameter exceeding 500 mm
- F16C 2326/00: Articles relating to transporting
- F16C 2326/30: Ships, e.g. propelling shafts and bearings therefor
- Y10T 29/49636: Process for making bearing or component thereof
- B66C: CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES ({specially adapted for lifting invalids A61G7/10;} rope, cable, or chain winding mechanisms, braking or detent devices therefor B66D; specially adapted for nuclear reactors G21)
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

This invention relates to a hoisting crane comprising a column, a jib and a jib connection member which is disposed on the column and to which the jib is connected pivotably. The crane further comprises an annular bearing structure extending around the column guiding and carrying the jib connection member rotatable about the column. The annular bearing structure comprises one or more column bearing parts connected to the column, comprising column bearing surfaces associated with the vertical column and one or more jib bearing parts connected to the jib connection member, comprising jib bearing surfaces associated with the jib connection member. A first column bearing surface is oriented substantially vertically and is arranged in a radial direction more inwards than a first jib bearing surface arranged opposite the first column bearing surfaces, to support radially inwards directed horizontal loads from the jib connection member to the column. A second column bearing surface is oriented substantially horizontally and is arranged below a second jib bearing surface arranged opposite the second column bearing surfaces to support downwardly directed vertical loads from the jib connection member to the column. According to a first aspect of the invention, a third column bearing surface is oriented substantially vertically and is arranged in a radial direction more outwards than a third jib bearing surface arranged opposite the third column bearing surface.

## Claims

### Claim 1

Hoisting crane, comprising:
a substantially hollow vertical column comprising a foot and a top and a body between the foot and the top,
a jib, a jib connection member which is disposed on the column and to which the jib is connected pivotably,
an annular bearing structure extending around the column guiding and carrying the jib connection member rotatable about the column, the annular bearing structure comprising:
one or more column bearing parts connected to the column, comprising column bearing surfaces associated with the vertical column; and
one or more jib bearing parts connected via bolts to the jib connection member, comprising jib bearing surfaces associated with the jib connection member;
wherein a first column bearing surface is oriented substantially vertically and is arranged in a radial direction more inwards than a first jib bearing surface arranged opposite the first column bearing surfaces, to support radially inwards directed horizontal loads from the jib connection member to the column;
wherein a second column bearing surface is oriented substantially horizontally and is arranged below a second jib bearing surface arranged opposite the second column bearing surfaces to support downwardly directed vertical loads from the jib connection member to the column; and
wherein the jib bearing parts and the jib connection member comprise opposite recesses in which one or more splines are provided to connect the jib bearing parts with the jib connection member, in addition to the connection via the bolts.

### Claim 2 (depends on 1)

Hoisting crane according to claim 1, wherein at least one vertical bolt extends through each spline to connect the spline to the jib bearing parts and to the jib connection member.

### Claim 3 (depends on 1)

Hoisting crane according to claim 1, wherein the jib connection member comprises a grouting supply opening and one or more grouting channels, which grouting channel has an opening in the recess of the jib connection member in order to fill voids in the recess around the spline with grouting.

### Claim 4 (depends on 1)

Hoisting crane according to claim 1, wherein the one or more splines are only provided in a portion of the annular bearing, preferably only at the semi-circular portion at which the jib is located.