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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10385931 B1

PDFFull Text
Date of Patent:
Aug. 20, 2019

Filed:

Feb. 20, 2015

Transmission brake device

Applicant:

Mazda Motor Corporation, Hiroshima, JP;

Inventors:

Tatsuhiko Iwasaki, Hiroshima, JP;

Shinya Kamada, Kure, JP;

Yasuhiro Ogauchi, Higashihiroshima, JP;

Assignee:

MAZDA MOTOR CORPORATION, Hiroshima, JP;

Attorney:

Studebaker & Brackett PC

Primary Examiner:

Richard M Lorence

Int. Cl.
CPC ...
F16D 25/0638 (2006.01); F16D 25/12 (2006.01); F16D 13/69 (2006.01); B60T 1/06 (2006.01); F16D 55/00 (2006.01); F16D 65/18 (2006.01); F16H 63/30 (2006.01); F16H 57/10 (2006.01); F16D 121/04 (2012.01); F16H 3/66 (2006.01);
U.S. Cl.
CPC ...
F16D 25/0638 (2013.01); B60T 1/062 (2013.01); F16D 13/69 (2013.01); F16D 25/126 (2013.01); F16D 55/00 (2013.01); F16D 65/186 (2013.01); F16H 57/10 (2013.01); F16H 63/3026 (2013.01); F16D 2055/0058 (2013.01); F16D 2121/04 (2013.01); F16H 3/66 (2013.01); F16H 2200/0052 (2013.01); F16H 2200/201 (2013.01); F16H 2200/2043 (2013.01);
Abstract

A transmission brake device includes: a friction plate set configured such that a plurality of rotation-side friction plates; an engaging piston disposed on an axial side of the friction plate set; a clearance adjustment piston disposed on a side of the engaging piston opposite to the friction plate set; a clearance adjustment hydraulic chamber configured to move the clearance adjustment piston; and an engaging hydraulic chamber configured to move the engaging piston; a biasing member disposed between each adjacent pair of the fixed-side friction plates, the biasing member being configured to bias each adjacent pair of the fixed-side friction plates in directions away from each other. The biasing member distributes the clutch clearance in a gap between each adjacent pair of the fixed-side friction plates when a hydraulic pressure is supplied only to the clearance adjustment hydraulic chamber.

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