Drive device and method of controlling the same
US-2024392530-A1 · Nov 28, 2024 · US
Power shovel having hydraulically driven dipper actuator
US8935866B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8935866-B2 |
| Application number | US-201313748125-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 23, 2013 |
| Priority date | Jan 23, 2013 |
| Publication date | Jan 20, 2015 |
| Grant date | Jan 20, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A hydraulic system for a power shovel may have a tank, a pump configured to draw fluid from the tank and pressurize the fluid, a crowd cylinder extendable and retractable to adjust a length of a dipper handle, and a valve in fluid communication with the tank, the pump, and the crowd cylinder. The valve may be movable to fill chambers of the crowd cylinder with fluid pressurized by the pump and to drain the chambers of the crowd cylinder to cause extension and retraction of the crowd cylinder. The hydraulic system may also have a dipper actuator located at an end of the crowd cylinder, and a passage extending through the crowd cylinder to communicate with the dipper actuator.
First claim
Opening claim text (preview).
What is claimed is: 1. A hydraulic system for a power shovel, comprising: a tank; a pump configured to draw fluid from the tank and pressurize the fluid; a crowd cylinder extendable and retractable to adjust a length of a dipper handle; a valve in fluid communication with the tank, the pump, and the crowd cylinder, the valve movable to fill chambers of the crowd cylinder with fluid pressurized by the pump and to drain the chambers of the crowd cylinder to cause extension and…
Assignees
Inventors
Classifications
Fixed Constructions · mapped topic
- E02F3/425Primary
Fixed Constructions · mapped topic
Fixed Constructions · mapped topic
Fixed Constructions · mapped topic
Fixed Constructions · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US8935866B2 cover?
- A hydraulic system for a power shovel may have a tank, a pump configured to draw fluid from the tank and pressurize the fluid, a crowd cylinder extendable and retractable to adjust a length of a dipper handle, and a valve in fluid communication with the tank, the pump, and the crowd cylinder. The valve may be movable to fill chambers of the crowd cylinder with fluid pressurized by the pump and …
- Who is the assignee on this patent?
- Caterpillar Inc
- What technology area does this patent fall under?
- Primary CPC classification E02F3/425. Mapped technology areas include Fixed Constructions.
- When was this patent published?
- Publication date Tue Jan 20 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).