# US 2021/0276847 A1 · Boom assembly

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- Number: US 2021/0276847 A1
- Document ID: US20210276847A1
- Status: Published application
- Kind: A1
- Application number: 17/193,516
- Filed: 2021-03-05
- Published: 2021-09-09
- Earliest claimed: 2020-03-06
- Assignees: Oshkosh Corporation
- Applicants: Oshkosh Corporation
- Inventors: Mark G. Neubauer; Gary L. Myers; Wenton S. Miller
- Web page: https://patentgrep.com/patent/US20210276847A1

## CPC

- B66C 23/64: Jibs
- B66F 11/046: {of the telescoping type}
- B21C 37/0803: {the tubes having a special shape, e.g. polygonal tubes}
- B66F 13/00: Common constructional features or accessories
- B66F 9/0655: {with a telescopic boom}
- 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)
- 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)
- B21C: MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL

## Abstract

At least one embodiment relates to a lift device including a chassis, a series of tractive elements coupled to the chassis, an implement, and a boom coupling the implement to the chassis. The boom includes (a) a first shell including a first sidewall and a first transition coupling a first set of flanges to the sidewall and (b) a second shell including a second sidewall and a second transition coupling a second set of flanges to the sidewall. The first shell abuts the second shell along the first set of flanges and the second set of flanges. The first transition and the second transition extend along a length of the boom. The first transition and the second transition at least partially define a channel. The first shell is coupled to the second shell by a weld positioned within the channel.

## Claims

### Claim 1

A lift device, comprising:
a chassis;
a plurality of tractive elements coupled to the chassis;
an implement; and
a boom coupling the implement to the chassis, the boom comprising:
a first shell including a first sidewall and a first transition coupling a first set of flanges to the sidewall; and
a second shell including a second sidewall and a second transition coupling a second set of flanges to the sidewall,
wherein the first shell abuts the second shell along the first set of flanges and the second set of flanges, wherein the first transition and the second transition extend along a length of the boom, wherein the first transition and the second transition at least partially define a channel, and wherein the first shell is coupled to the second shell by a weld positioned within the channel.

### Claim 2 (depends on 1)

The lift device of claim 1, wherein the first set of flanges and the second set of flanges are viewed in a plane orthogonal to the first sidewall and the second sidewall.

### Claim 3 (depends on 2)

The lift device of claim 2, wherein the first set of flanges and the second set of flanges define a horizontal axis of the boom.

### Claim 4 (depends on 3)

The lift device of claim 3, wherein the first set of flanges comprises a first flange and a second flange, wherein the first set of flanges extend along the horizontal axis.

### Claim 5 (depends on 4)

The lift device of claim 4, wherein the second set of flanges comprises a third flange and a fourth flange, wherein the second set of flanges extend along the horizontal axis.

### Claim 6 (depends on 1)

The lift device of claim 1, wherein the first set of flanges and the second set of flanges define a vertical axis of the boom, wherein the first set of flanges and the second set of flanges extend along the vertical axis of the boom.

### Claim 7 (depends on 1)

The lift device of claim 1, wherein the boom is a jib boom configured to rotate along an axis of the boom such that the jib boom is positioned in a plurality of lateral positions.

### Claim 8 (depends on 1)

The lift device of claim 1, further comprising a third set of flanges coupled to the first shell.

### Claim 9 (depends on 8)

The lift device of claim 8, further comprising a fourth set of flanges coupled to the second shell.

### Claim 10 (depends on 9)

The lift device of claim 9, wherein the first set of flanges and the third set of flanges are viewed in a plane orthogonal to the first sidewall such that the first set of flanges and the third set of flanges are oriented parallel to one another.

### Claim 11 (depends on 10)

The lift device of claim 10, wherein the second set of flanges and the fourth set of flanges are viewed in a plane orthogonal to the second sidewall such that the second set of flanges and the fourth set of flanges are oriented parallel to one another.

### Claim 12 (depends on 9)

The lift device of claim 9, wherein the third set of flanges and the fourth set of flanges are positioned along a vertical axis of the boom such that the first set of flanges and the second set of flanges are oriented perpendicular to the third set of flanges and the fourth set of flanges.

### Claim 13 (depends on 9)

The lift device of claim 9, wherein the third set of flanges and the fourth set of flanges are positioned along a diagonal axis of the boom.

### Claim 14 (depends on 1)

The lift device of claim 1, wherein at least one of the first transition and the second transition is defined by a radius such that at least one of the first set of flanges and the second set of flanges form a curved shape.

### Claim 15 (depends on 1)

The lift device of claim 1, wherein at least one of the first transition and the second transition is at least partially defined by a flat portion such that at least one of the first set of flanges and the second set of flanges form a V shape.

### Claim 16 (depends on 1)

The lift device of claim 1, wherein the first shell and the second shell at least partially define an enclosed volume such that the first set of flanges and the second set of flanges extend inward towards the enclosed volume or outward away from the enclosed volume.

### Claim 17

A boom, comprising:
a first shell including a first sidewall and a first set of flanges coupled to the sidewall, the first set of flanges comprising:
a first flange; and
a second flange,
a second shell including a second sidewall and a second set of flanges coupled to the sidewall, the second set of flanges comprising:
a third flange; and
a fourth flange,
a plurality boom segments,
wherein the first sidewall is coupled to the second sidewall such that the first sidewall and second sidewall at least partially define an enclosed volume, and wherein the first set of flanges and the second set of flanges at least partially define a channel.

### Claim 18 (depends on 17)

The boom of claim 17, wherein the first shell abuts the second shell along the first set of flanges and the second set of flanges, wherein the first set of flanges and the second set of flanges are disposed along a longitudinal axis of the boom.

### Claim 19 (depends on 18)

The boom of claim 18, wherein the first set of flanges is coupled to the second set of flanges by a weld positioned within the channel.

### Claim 20

A method of manufacturing the lift device, comprising:
forming a first shell including a first sidewall and a first flange coupled to the sidewall, wherein the first flange is disposed in a perpendicular orientation away from the first sidewall;
forming a second shell including a second sidewall and a second flange coupled to the sidewall, wherein the second flange is disposed in a perpendicular orientation away from the first sidewall; and
positioning the first flange and the second flange in a generally horizontal orientation, wherein the first flange and the second flange at least partially define a channel, and wherein the first shell and the second shell are coupled together by a weld positioned within the channel.