Dual actuator assembly

Patent metadata

Field	Value
Publication number	US-11225400-B2
Application number	US-202016838675-A
Country	US
Kind code	B2
Filing date	Apr 2, 2020
Priority date	Apr 6, 2016
Publication date	Jan 18, 2022
Grant date	Jan 18, 2022

Abstract

A lift device includes a base, a boom coupled to the base, and an actuator assembly having (i) a first end coupled to the base and (ii) an opposing second end coupled the boom. The actuator assembly includes a first actuator, a second actuator, and a coupler coupling the first actuator and the second actuator together at or proximate one of the first end or the opposing second end of the actuator assembly. The coupler is pivotally coupled to a pivot point of one of the boom or the base. The coupler pivots with the first actuator and the second actuator about the pivot point.

First claim

The invention claimed is:

1. A boom assembly comprising:
a boom including:
a first boom;
a second boom pivotally coupled to the first boom; and
an intermediate link coupled to the first boom, the intermediate link defining a pivot point; and

an actuator assembly having (i) a first end coupled to the first boom and (ii) an opposing second end coupled the second boom, the actuator assembly comprising:
a first actuator;
a second actuator; and
a coupler coupling the first actuator and the second actuator together at or proximate the first end of the actuator assembly;
wherein the coupler is pivotally coupled to the pivot point of the intermediate link, such that the intermediate link (i) is positioned between the coupler and the first boom and (ii) couples the first end of the actuator assembly to the first boom; and
wherein the coupler pivots with the first actuator and the second actuator about the pivot point.

2. The boom assembly of claim 1 , wherein the intermediate link includes (i) a first link (a) extending between the coupler and the first boom and (b) defining the pivot point and (ii) a second link extending between the first link and the second boom.

3. The boom assembly of claim 1 , wherein the coupler is a first coupler, further comprising a second coupler extending between and flexibly coupling the first actuator and the second actuator proximate the opposing second end of the actuator assembly.

4. The boom assembly of claim 3 , wherein the second coupler facilitates relative movement between the first actuator and the second actuator.

5. The boom assembly of claim 3 , wherein the pivot point is a first pivot point, and wherein the actuator assembly includes:
a third coupler positioned at an end of the first actuator opposite the first coupler, the third coupler pivotally coupling the first actuator to a second pivot point of the second boom; and
a fourth coupler positioned at an end of the second actuator opposite the first coupler, the fourth coupler pivotally coupling the second actuator to a third pivot point of the second boom.

6. The boom assembly of claim 5 , wherein the second coupler is positioned between (i) the first coupler and (ii) the third coupler and the fourth coupler.

7. The boom assembly of claim 1 , wherein at least one of the first boom or the second boom is telescopic.

Assignees

• Oshkosh Corp

Inventors

• Mellott Lex A
• Welsh Eric T

Classifications

• B66C23/54 Primary

  with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors · CPC title

• B66F11/044

  Working platforms suspended from booms · CPC title

• E02F9/2271

  Actuators and supports therefor and protection therefor · CPC title

• E02F3/425

  Drive systems for dipper-arms, backhoes or the like · CPC title