Granted Patent B2

US 12,504,673 · App. 18/738,121 · Granted Dec 23, 2025

Inventor: Michael Trøst Steffensen (Frederiksberg C, DK)

G03B17/08

Abstract

Claims (16)

1 . A lightweight underwater camera assembly to be pulled through water in a forward direction, comprising:

an elongated main body having a substantially cylindrical shape with radius, r, and a front-end part and a rear-end part and an upper part and a lower part, the main body holding a camera in a waterproof manner with a camera aperture being aligned with a backward facing window in the rear-end part;

a line attachment system configured to secure the main body to a section of a line, wherein the line attachment system is positioned on the lower part of the main body;

a lip extending downwardly and forwardly from the lower part of the front-end part, wherein the lip comprises an upper surface part that has a width W t with W t =2r±20%, is forward-facing and directly attached to the lower part of the front-end part of the main body and configured to exert a downward force on the main body when the assembly is pulled through water in the forward direction; and

at least two stabilizers extending laterally from the rear-end part at symmetrical angles between 10-80 degrees from a vertical direction;

wherein a downward slope of the lip relative to a longitudinal center axis of the elongated main body is between 5-30 degrees and

wherein the lightweight underwater camera assembly has positive buoyancy in freshwater and a mass of less than 100 grams.

2 . The lightweight underwater camera assembly according to claim 1 , wherein the upper surface part of the lip has a surface area A t =(2r) 2 ±50%.

3 . The lightweight underwater camera assembly according to claim 1 , wherein the upper surface part of the lip involves oblique surface parts, symmetrically slanting sideways and downwardly from a forward-backward center axis of the upper surface part.

4 . The lightweight underwater camera assembly according to claim 3 , wherein a downward angle of the oblique surface parts is between 5-25 degrees.

5 . The lightweight underwater camera assembly according to claim 1 , wherein the symmetrical angles of the at least two stabilizers are between 45-75 degrees from a vertical direction.

6 . The lightweight underwater camera assembly according to claim 1 , wherein the stabilizers extend at least a length L s =2r±20% from the rear-end part of the elongated body.

7 . The lightweight underwater camera assembly according to claim 1 , wherein the camera assembly comprises at least one stabilizer extending laterally and in a vertical direction from the lower part of the rear-end part and a metal weight, and wherein the at least one stabilizer is configured to hold the metal weight.

8 . The lightweight underwater camera assembly according to claim 1 , wherein the lip and the stabilizers are detachable.

9 . The lightweight underwater camera assembly according to claim 1 , wherein the line attachment system comprises an elongated tubular element, and wherein the line attachment system is configured to secure the main body to the line section by threading the line section through the elongated tubular element.

10 . The lightweight underwater camera assembly according to claim 1 , wherein no fishing hook is attached to the main body.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (39)