Drive device and method of controlling the same
US-2024392530-A1 · Nov 28, 2024 · US
Construction machine with hydraulic pipes
US8939699B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8939699-B2 |
| Application number | US-201113641730-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 19, 2011 |
| Priority date | Apr 20, 2010 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
Official abstract text for this publication.
In a construction machine, a boom assist cylinder ( 7 A) assists an operation of a boom ( 4 ) by a hydraulic pressure, and an arm assist cylinder ( 8 A) assists an operation of an arm ( 5 ) by a hydraulic pressure. An accumulator ( 16 ) accumulates operation oil to be supplied to the boom assist cylinder and the arm assist cylinder in a pressurized state. A first hydraulic pipe ( 14 ) connects between the boom assist cylinder and the arm assist cylinder. A second hydraulic pipe ( 12 ) connects between the arm assist cylinder and the accumulator. The second hydraulic pipe is connected to a hydraulic connection port of the arm assist cylinder so that the operation oil is supplied in a direction of closing the arm from the accumulator to the arm assist cylinder.
First claim
Opening claim text (preview).
The invention claimed is: 1. A construction machine that drives a work attachment by a boom and an arm, comprising: a boom assist cylinder that assists an operation of the boom by a hydraulic pressure; an arm assist cylinder that assists an operation of the arm by a hydraulic pressure; an accumulator that accumulates operation oil to be supplied to said boom assist cylinder and said arm assist cylinder in a pressurized state; a first hydraulic pipe connected between said boo…
Assignees
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Classifications
- E02F9/2217Primary
Fixed Constructions · mapped topic
Fixed Constructions · mapped topic
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Frequently asked questions
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- What does patent US8939699B2 cover?
- In a construction machine, a boom assist cylinder ( 7 A) assists an operation of a boom ( 4 ) by a hydraulic pressure, and an arm assist cylinder ( 8 A) assists an operation of an arm ( 5 ) by a hydraulic pressure. An accumulator ( 16 ) accumulates operation oil to be supplied to the boom assist cylinder and the arm assist cylinder in a pressurized state. A first hydraulic pipe ( 14 ) connects …
- Who is the assignee on this patent?
- Tsukane Koichiro, Sumitomo Heavy Industries
- What technology area does this patent fall under?
- Primary CPC classification E02F9/2217. Mapped technology areas include Fixed Constructions.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).