Patent US4458436A successfully refreshed from Google Patents.
US4458436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sight for shotguns
Assignee: Individual
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Filing: 1982-03-22
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Granted: 1984-07-10
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Expires: 2002-03-22
Abstract
Abstract Sight for shotguns with a forwardly widening conic frustum fixed to a mounting on the gun and having in its forward portion a ring extending inwardly from the frustum wall to define with its interior surface a sighting cone coaxial to the conic frustum. The ring emits red or orange light for example towards the shooter's eye, which contrasts with the background to the target. In a daylight version the translucent ring material is treated with a fluorescent agent and/or pigment, and in a night version light diodes are arranged in the ring.
Inventors
- 👤 Thomas G. Bohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:33
CPC Classifications
F; F41; F41G; F41G1/00; F41G1/42; F41G1/32
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
131 words
A sight for a shotgun having a barrel and a swarm shot pattern comprising a forwardly widening conic frustum adapted to be mounted on the gun, the axis of said conic frustum being substantially parallel to the axis of the barrel of the gun, the conic frustum defining a space for the user's eye within which a moving target at commonly occurring speeds up to the range of the gun can be hit by the shot swarm from the barrel, and a translucent ring in the forward portion of the conic frustum, the ring extending inwardly from the wall of the conic frustum to define with its inner ring surface a sighting cone coaxial with the conic frustum to assist the user in keeping his eye on the axis of sight.
Claim 2
Dependent Claim
131 words
A sight for a shotgun having a barrel and a swarm shot pattern comprising a forwardly widening conic frustum adapted to be mounted on the gun, the axis of said conic frustum being substantially parallel to the axis of the barrel of the gun, the conic frustum defining a space for the user's eye within which a moving target at commonly occurring speeds up to the range of the gun can be hit by the shot swarm from the barrel, and a translucent ring in the forward portion of the conic frustum, the ring extending inwardly from the wall of the conic frustum to define with its inner ring surface a sighting cone coaxial with the conic frustum to assist the user in keeping his eye on the axis of sight.
Claim 3
Dependent Claim
39 words
The sight of claim 1, in which the rearwardly facing surface of the ring is luminous and emits towards the eye of the user light of a color that contrasts with the color of the background of the target.
Claim 4
Dependent Claim
35 words
The sight of claim 2, wherein the ring is of an acrylic plastic, treated with a fluorescent agent, so that daylight entering the forward portion of the ring lights the rear face of the ring.
Claim 5
Dependent Claim
15 words
The sight of claim 3, in which the fluorescent agent is mixed into the plastic.
Claim 6
Dependent Claim
39 words
The sight of claim 2, including at least one light source in the ring adapted to light the rearwardly directed face of the translucent ring and a current source connected to the light source via a current regulator means.
Claim 7
Dependent Claim
53 words
The sight of any one of claims 1-4 in which the tip angle of the conic frustum is selected so that a target with the highest occurring speed transverse to its axis will be hit by the shot swarm when the target is visible at the inner ring surface of the translucent ring.
Claim 8
Dependent Claim
20 words
The sight of claim 1 in which the rearwardly facing surface of the ring has a width of 2-4 mm.
Claim 9
Dependent Claim
14 words
The sight of claim 1 wherein the rearwardly facing surface has a mat finish.
Claim 10
Dependent Claim
14 words
The sight of claim 1 wherein the ring is interchangeable in the conic frustum.
Claim 11
Dependent Claim
45 words
The sight of claim 1 including an inner ring concentrically mounted in the conic frustum between the eye of the user and the translucent ring, the inner ring having a radius of approximately one-half the radius of the inner ring surface of the translucent ring.
Claim 12
Dependent Claim
23 words
The sight of claim 10 wherein the inner ring is a circular line scribed on a transparent disc fixed in the conic frustum.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |