 |
|
|
|
|
|
 Title: |
US5170190:
Water sportsman's face mask for viewing objects above and below the line of vision
[ Derwent Title ]
|
| Country: |
US United States of America
|
| |
| Inventor: |
Berke, Joseph J.; West Bloomfield, MI 48033
|
| Assignee: |
None
|
| Published / Filed: |
1992-12-08
/ 1990-06-18
|
| Application Number: |
US1990000539195
|
| IPC Code: |
Advanced:
B63C 11/12;
G02C 7/14;
Core:
B63C 11/02;
G02C 7/00;
IPC-7:
A61F 9/02;
G02C 1/00;
|
| U.S. Class: |
Current:
351/043;
002/430;
351/158;
Original:
351/043;
351/158;
002/430;
|
| Field of Search: |
351/043,57,158
002/430
|
| Priority Number: |
| 1990-06-18 |
US1990000539195 |
|
| Abstract: |
A water sportsman's face mask for enabling a swimmer on or below the surface of a body of water to view objects which lie substantially above or below his normal line of vision without rotation of the swimmer's head or body. The mask comprises a frame, a lens mounted in the front 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 a pair of triangular prisms mounted on the lens which enable the swimmer to view objects above or below the swimmer's normal line of vision. One face of the prism is mirrorized and is in oblique relationship to the lens. In one embodiment of the invention the prisms are rotatably mounted to the frame and are selectively adjustable to a forward operative position and to a rearward inoperative position.
|
| Attorney, Agent or Firm: |
Rhodes, Alex ;
|
| Primary / Asst. Examiners: |
Bovernick, Rodney B.;
|
| Maintenance Status: |
E3 Expired Check current status
CC Certificate of Correction issued
|
| INPADOC Legal Status: |
Show legal status actions
|
| Family: |
None
|
First Claim:
Show all 15 claims |
I claim:
1. A face mask for viewing objects substantially above or below the normal forward field of vision of a swimmer, comprising: a frame, said frame having an open front portion for receiving a lens, a flexible member attached to the rear portion of the frame for providing a water-tight seal between said frame and the face of a swimmer, a lens mounted in the open front portion of said frame for enabling said swimmer to view objects ahead of said swimmer in the direction of the swimmer's normal forward line of vision, a means for attaching said mask to the head of said swimmer, and a single optical element mounted on the front of said lens, said optical element being adapted for enabling said swimmer to view objects outside of the swimmer's normal forward field of vision in the direction of a second line of vision which is substantially vertical to the normal forward line of vision of said swimmer, said optical element being comprised of a first planar surface and second substantially totally internally reflecting planar surface disposed at an acute angle equal to or greater than the critical angle with respect to said first planar surface such that the rays entering said optical element are substantially totally internally reflected by said second surface.
|
| Background / Summary: |
Show background / summary
|
| Drawing Descriptions: |
Show drawing descriptions
|
| Description: |
Show description
|
| Forward References: |
Show 9 U.S. patent(s) that reference this one
|
