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:
Nov. 30, 1993
Filed:
Nov. 13, 1991
Hiromi Kinoshita, Shimonoseki, JP;
Nichimo Co., Ltd., Tokyo, JP;
Abstract
Otter board which is provided with a means for adjusting net-mouth expanding force which can be driven by liftingrope thereby to freely vary said force. According to the first embodiment of the invention, said otter board is formed by biplane construction of board planemembers, and said means for adjusting the net-mouth expanding force comprises the outermost board plane member of said biplane construction that is variable in its angle of attck about a pivot provided in the biplane construction. According to the second embodiment of the invention, said means for adjusting the net-mouth expanding force comprises a through bore in a single otter board construction, said through holehaving a variable opening area by means of an oscillating member.