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.:
Date of Patent:
Feb. 19, 2019
Filed:
May. 22, 2015
Dongkang Holdings Co., Ltd., Gwangju, KR;
Woojung Cheon, Gwangju, KR;
DAYOU HOLDINGS CO., LTD., Gwangju, KR;
Abstract
Disclosed herein is a multi-hardness cushion having a ventilation structure. This includes a support cushion having an insert recess, and stepped portions formed on both sides of the insert recess; a friction cushion detachably provided in the insert recess and having locking parts locked to the stepped portions; a first ventilation unit having a first air flow channel provided in the insert recess, a plurality of first side flow channels provided in the stepped portions, and an air inlet opening provided in the first air flow channel; and a second ventilation unit having a second air flow channel formed in the friction cushion to face the first air flow channel, a plurality of second air flow holes formed along the second air flow channel to penetrate the friction cushion, and a plurality of second side flow holes formed in the locking parts.