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US Patent 7980337 Stair climbing device

Patent 7980337 was granted and assigned to Nanyang Polytechnic on July, 2011 by the United States Patent and Trademark Office.

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Patent attributes

Current Assignee

Nanyang Polytechnic

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Patent Jurisdiction

United States Patent and Trademark Office

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Patent Number

Patent Inventor Names

Chin Sai Wong0

Kannappan@Suresh A/L Lynkaran0

Date of Patent

July 19, 2011

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Patent Application Number

125314910

Date Filed

March 16, 2007

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Patent Citations Received

US Patent 11771607 Patient support apparatus with deck section actuator

Patent Primary Examiner

Joanne Silbermann

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Patent abstract

The present invention provides a device for safely and conveniently conveying an object on a slope. The safety feature includes a fail-safe one-way brake comprising a ratchet wheel, a pawl and a biasing means. In one embodiment, the device is foldable; in another embodiment, the device is integrated with a suitcase; in yet another embodiment, the device is motorized.

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