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 Title: |
US5216454:
Water sportsman's face mask for viewing objects in the opposite direction of the normal line of vision
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Berke, Joseph J.; West Bloomfield, MI 48033
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| Assignee: |
None
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| Published / Filed: |
1993-06-01
/ 1990-07-13
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| Application Number: |
US1990000553885
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| IPC Code: |
Advanced:
A63B 33/00;
B63C 11/12;
Core:
B63C 11/02;
more...
IPC-7:
G02C 1/00;
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| U.S. Class: |
Current:
351/043;
002/430;
351/158;
Original:
351/043;
351/158;
002/430;
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| Field of Search: |
351/158,43,50,442,57
002/430
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| Priority Number: |
| 1990-07-13 |
US1990000553885 |
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| Abstract: |
A water sportsman's face mask for enabling a person swimming on or below the surface of a body of water to view objects in the opposite direction to his normaI line of vision. The mask comprises a frame, a lens mounted in the front portion of the frame, a flexible seal attached to the rear of the frame for forming a water-tight seal between the frame and the face of the swimmer, an adjustable strap for attaching the mask to the swimmer's head, and at least one prism in front of the lens having a pair of complementary faces which are inclined to the lens and internally reflect rays from objects behind the swimmer into his forward field of vision. In a second embodiment, a module is mounted on the front of a mask and has a pair of prisms, each having one member of a pair of complementary inclined faces for viewing objects behind a swimmer.
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| Attorney, Agent or Firm: |
Rhodes, Alex ;
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| Primary / Asst. Examiners: |
Bovernick, Rodney B.; Dang, Hung Xuan
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| Maintenance Status: |
E2 Expired Check current status
CC Certificate of Correction issued
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| INPADOC Legal Status: |
Show legal status actions
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| Family: |
None
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First Claim:
Show all 13 claims |
I claim:
1. A face mask for viewing object in a direction opposite to the normal line of visions comprising: a frame, said frame having an open font portion for receiving a lens; a lens mounted in said open front portion for enabling a swimmer to view object ahead of said swimmer; a flexible member attached to the rear portion of said frame for sealing said frame against the face of said swimmer; a means for attaching said mask to the head of said swimmer; and an optical means mounted on the front of said mask substantially at the eye level of said swimmer and having at lest one pair of complementary planar faces which are in inclined relationship to said lens, said faces cooperating to enable said swimmer to view objects behind him when he is facing forward without shifting the swimmer's eyes vertically up or down away from the normal line of visions of said swimmer.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 9 U.S. patent(s) that reference this one
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