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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 10029528 B1

PDFFull Text
Date of Patent:
Jul. 24, 2018

Filed:

Aug. 11, 2016

Urethane bumper spring, and method for producing same

Applicant:

Sumitomo Riko Company Limited, Komaki-shi, Aichi, JP;

Inventors:

Yasuo Suzuki, Komaki, JP;

Takuya Hasegawa, Komaki, JP;

Yorikazu Nakamura, Komaki, JP;

Masanobu Mizusaki, Komaki, JP;

Assignee:

SUMITOMO RIKO COMPANY LIMITED, Komaki-shi, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Thomas J Williams

Assistant Examiner:

James K Hsiao

Int. Cl.
CPC ...
F16F 1/37 (2006.01); F16F 9/58 (2006.01); B60G 11/22 (2006.01); B29C 39/02 (2006.01); B29C 39/24 (2006.01); C08G 18/42 (2006.01); F16F 1/36 (2006.01); F16F 1/376 (2006.01); C08G 18/66 (2006.01); C08G 18/76 (2006.01); C08G 18/32 (2006.01); B29C 45/00 (2006.01); B29C 45/18 (2006.01); B29C 45/36 (2006.01); B29C 45/72 (2006.01); C08G 101/00 (2006.01); B29K 75/00 (2006.01); B29K 105/00 (2006.01); B29L 31/30 (2006.01); B29L 31/00 (2006.01);
U.S. Cl.
CPC ...
B60G 11/22 (2013.01); B29C 39/02 (2013.01); B29C 39/24 (2013.01); B29C 45/0001 (2013.01); B29C 45/1866 (2013.01); B29C 45/36 (2013.01); B29C 45/7207 (2013.01); C08G 18/3206 (2013.01); C08G 18/42 (2013.01); C08G 18/664 (2013.01); C08G 18/7671 (2013.01); F16F 1/3605 (2013.01); F16F 1/37 (2013.01); F16F 1/376 (2013.01); B29K 2075/00 (2013.01); B29K 2105/0002 (2013.01); B29L 2031/30 (2013.01); B29L 2031/774 (2013.01); B60G 2202/143 (2013.01); B60G 2204/45021 (2013.01); B60G 2206/73 (2013.01); B60G 2206/8106 (2013.01); B60G 2206/81012 (2013.01); C08G 2101/0083 (2013.01); F16F 9/58 (2013.01);
Abstract

A urethane bumper spring is produced from a urethane raw material containing a polyester-based polyol as a polyol component and diphenylmethane diisocyanate as an isocyanate component, and includes: a skin layer; and a core portion, in which the skin layer has a density (Da) and a foamed cell diameter (Ra), and the core portion has a density (Db) and a foamed cell diameter (Rb). The density (Da), the foamed cell diameter (Ra), the density (Db), and the foamed cell diameter (Rb) satisfy relationships shown in the following expressions: 1.0≤Da/Db<1.34 (1) and 0.53<Ra/Rb≤1.0 (2). Accordingly, the urethane bumper spring can achieve a cost reduction while having durability and settling resistance under high load and high deformation.

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