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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 12139119 B1

PDFFull Text
Date of Patent:
Nov. 12, 2024

Filed:

Sep. 29, 2021

Hydraulic brake wear detection apparatus and method

Applicant:

Zf Active Safety Us Inc., Livonia, MI (US);

Inventors:

Blaise J. Ganzel, Ann Arbor, MI (US);

Jeffrey E. Shaya, Farmington Hills, MI (US);

Assignee:

ZF Active Safety US Inc., Livonia, MI (US);

Attorney:

Kristin L. Murphy

Primary Examiner:

Ishal R Sahni

Int. Cl.
CPC ...
B60T 17/22 (2006.01); B60T 1/06 (2006.01); B60T 13/14 (2006.01); B60T 13/58 (2006.01); B60T 13/68 (2006.01); F16D 55/226 (2006.01); F16D 65/74 (2006.01); F16D 66/02 (2006.01); B60T 7/04 (2006.01); B60T 7/12 (2006.01); F16D 121/04 (2012.01); F16D 125/08 (2012.01); F16D 125/10 (2012.01);
U.S. Cl.
CPC ...
B60T 17/221 (2013.01); B60T 1/065 (2013.01); B60T 13/148 (2013.01); B60T 13/58 (2013.01); B60T 13/686 (2013.01); F16D 55/226 (2013.01); F16D 65/74 (2013.01); F16D 66/027 (2013.01); F16D 66/028 (2013.01); B60T 7/042 (2013.01); B60T 7/12 (2013.01); B60T 2270/406 (2013.01); B60T 2270/82 (2013.01); B60T 2270/88 (2013.01); F16D 2121/04 (2013.01); F16D 2125/08 (2013.01); F16D 2125/10 (2013.01);
Abstract

A hydraulic brake wear detection apparatus and a method for detecting a degree of pad wear of a brake pad of a hydraulic brake includes a caliper piston located at least partially within a caliper cavity and attached to the brake pad. The caliper piston includes a piston cavity extending from a caliper piston rim into a caliper piston body at a location longitudinally opposite, and spaced from, the brake pad. An internal piston is located at least partially within the piston cavity and is entirely enclosed in an internal space defined cooperatively by the piston cavity and the caliper cavity for reciprocal longitudinal motion with respect to the internal space. The internal piston is reciprocated by a predetermined volume of pressurized hydraulic fluid responsive to wear of the brake pad.

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