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 Title: |
US4045901:
Trawler doors
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Prudenzi, Augusto; Somerville, MA 02145
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| Assignee: |
None
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| Published / Filed: |
1977-09-06
/ 1976-09-29
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| Application Number: |
US1976000727952
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| IPC Code: |
Advanced:
A01K 73/045;
Core:
A01K 73/00;
IPC-7:
A01K 73/04;
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| ECLA Code: |
A01K73/045;
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| U.S. Class: |
Current:
043/009.7;
043/043.13;
Original:
043/009;
043/043.13;
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| Field of Search: |
043/009,8,43.13
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| Priority Number: |
| 1976-09-29 |
US1976000727952 |
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| Abstract: |
A cooperating pair of trawler doors is disclosed wherein each door comprises a longitudinally arcuate body with a convex inner side and a concave outer side, at least one louver in the body providing slots for passage of water through the doors, first attaching means affixed to the forward portion of the convex inner side for attachment of the forward portion of a tow line to the towing vessel, and second attaching means affixed to the aft portion of the concave outer side of the door for attachment of the aft portion of the towline to a trawler net.
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| Attorney, Agent or Firm: |
Hudson, Kenneth D. ;
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| Primary / Asst. Examiners: |
Camp, Warner H.;
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| Family: |
None
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First Claim:
Show all 6 claims |
I claim:
1. A pair of cooperating trawler doors for fishing, said doors being adapted for attachment, respectively, to a pair of towlines affixed one to each side of the open mouth of a trawler net and to hold the mouth open by causing the towlines to diverge as the net is towed through the water, each door comprising upper and lower stiffening members and at least three sheet metal plates affixed therebetween, the front and rear plates extending over a majority of the area of each door and defining a longitudinally arcuate body portion with a convex inner side and a concave outer side, at least one intermediate plate being offset from the arc of said body portion to form a louver providing a plurality of slots having a substantial vertical component for passage of water through the door from one side to the other as the door is towed through the water, first attaching means affixed to the forward portion of the convex inner side of the door for attaching the forward portion of one of said towlines to the towing vessel, and second attaching means affixed to the aft portion of the concave side of the door for attaching the aft portion of said towline to the net.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
Show drawing descriptions
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| Description: |
Show description
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| Forward References: |
Show 5 U.S. patent(s) that reference this one
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