PatentsDB

Cylinder device

US8978377B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-8978377-B2
Application numberUS-201013390450-A
CountryUS
Kind codeB2
Filing dateAug 27, 2010
Priority dateAug 31, 2009
Publication dateMar 17, 2015
Grant dateMar 17, 2015

How to read this patent

A practical reading order for non-experts. Skip the full description unless you need deep technical detail.

  1. Title

    What the patent document calls the invention.

  2. Abstract

    A short plain-language summary of the technical disclosure.

  3. Assignees and inventors

    Who owns or filed the patent and who is credited as inventor.

  4. Key dates

    Filing, priority, publication, and grant dates set the timeline.

  5. First independent claim

    The legal scope of protection — read this for what is actually claimed.

  6. CPC / IPC classifications

    Technology tags used to group this patent with similar filings.

  7. Citations and related patents

    Prior art links and similar publications in this corpus.

Abstract

Official abstract text for this publication.

A cylinder device is characterized in: that it selectively realizes an operation-force dependent pressurizing state where brake fluid is pressurized by operation force and a high-pressure-source-pressure dependent pressurizing state where brake fluid is pressurized depending on a pressure from a high-pressure-source device; that there are defined an inter-piston chamber in front of an input piston by an insertion of the input piston into a pressurizing piston, an input chamber in the back of a flange of the pressurizing piston at the pressure from the high pressure source device, and an opposing chamber in front of the flange; and that the cylinder device has a mechanism elastically pressurizing an reaction force chamber formed by a communication between the inter-piston and the opposing chambers, and a mechanism switching communication/not-communication state between the reaction chamber and a reservoir.

First claim

Opening claim text (preview).

The invention claimed is: 1. A cylinder device which supplies, in order to operate a brake device provided at a wheel, a pressurized brake fluid to the brake device, comprising: a housing whose front end portion is closed and which is shaped like a tube; a pressurizing piston which has a main body portion, a flange portion formed on a circumference of the main body portion, and a blind hole opening at a rear end of the pressurizing piston and which is disposed in the housing so…

Assignees

Inventors

Classifications

Patent family

Related publications grouped by family.

View patent family 43628048

External sources

Next steps

Free tools are coming soon. Tell us what you want to track and we'll notify you.

Get alerts for this patentView on Google Patents

Request deeper analysis

Frequently asked questions

Answers are generated from the same data shown on this page.

What does patent US8978377B2 cover?
A cylinder device is characterized in: that it selectively realizes an operation-force dependent pressurizing state where brake fluid is pressurized by operation force and a high-pressure-source-pressure dependent pressurizing state where brake fluid is pressurized depending on a pressure from a high-pressure-source device; that there are defined an inter-piston chamber in front of an input pis…
Who is the assignee on this patent?
Isono Hiroshi, Toyota Motor Co Ltd
What technology area does this patent fall under?
Primary CPC classification B60T13/165. Mapped technology areas include Operations & Transport.
When was this patent published?
Publication date Tue Mar 17 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).