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 Title: |
US3835493:
SWIM FIN
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Grivna, Gerald J.; Littleton, CO
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| Assignee: |
Clark; J. Wickham, Golden, CO
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| Published / Filed: |
1974-09-17
/ 1973-04-19
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| Application Number: |
US1973000352784
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| IPC Code: |
Advanced:
A63B 31/08;
Core:
A63B 31/00;
IPC-7:
A63B 31/04;
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| U.S. Class: |
Current:
441/056;
441/059;
Original:
009/307;
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| Field of Search: |
009/301,303,307,308
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| Priority Number: |
| 1973-04-19 |
US1973000352784 |
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| Abstract: |
A swim fin of fabric type material that is applied to a swimmer's appendages for extension between the operative extremity and a location closer the trunk or body of the swimmer. The fin at its midpoint is of a width corresponding to or slightly larger than the associated appendage at such position with fore and aft extensions therefrom being of various shape, size and configurations. The fin is to be attached to the swimmer at its fore and aft ends thereby providing a ballooning effect between the points of attachment during power stroke type swimming movements for the delivery of an increased propulsion effect. Preferably the fin is made permeable to water so a through flow of water will provide a desirable fin shaping effect and fin control.
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| Attorney, Agent or Firm: |
Messenger, C. B. ;
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| Primary / Asst. Examiners: |
Blix, Trygve M.; O'Connor, Gregory W.
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| Family: |
None
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First Claim:
Show all 9 claims |
I claim:
1. A swim fin for application to a swimmer's lower arm to provide an increased propulsion effect comprising a lower support for engagement adjacent the swimmer's hand, an upper band support for engagement on the arm at a position adjacent the elbow of the swimmer, a body element of flexible water pervious sheet material that is of cross-sectional width corresponding to the projected width of the swimmer's arm at a midpoint of said body element attached to said lower support adjacent each edge of said body element and extending loosely between said edges and said upper and lower supports for water induced movement to alternate positions either collapsed to conform with the swimmer's arm during return stroke movements or billowing therefrom when the arm is moved through water in an opposite direction during power stroke movements to provide the increased propulsion effect.
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| Background / Summary: |
Show background / summary
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| 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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