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Equalized pivot mount for riflescope

Imported: 23 Feb '17 | Published: 22 Oct '02

Rodney H. Otteman

USPTO - Utility Patents

Abstract

A force-equalized pivot mount for a telescopic sight such as a riflescope includes a lens holder having a pivot end positioned between a fixed half-socket and an opposing movable half-socket. A resilient member biases the movable half-socket toward the fixed half-socket to pivotally capture the pivot end therebetween. Rotation of the lens holder generates first lateral friction forces at a first sliding interface between the fixed half-socket and the pivot end that are equalized by oppositely-directed second friction forces generated at a second sliding interface between the movable half-socket and the pivot end. Force-equalization prevents the lens holder from walking within the pivot mount, reduces wear at the sliding interfaces, and improves aiming accuracy.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic cross sectional view of a riflescope including a half-socket pivot mount in accordance with the prior art;

FIG. 2A is a partial cross sectional view of a riflescope and equalized pivot mount in accordance with the present invention;

FIG. 2B is an enlarged view of the riflescope of FIG. 2A showing detail of the equalized pivot mount; and

FIG. 3 is a schematic cross sectional view of the riflescope of FIGS.

2A and

2B.

Claims

1. In a riflescope of the type including an elongate tubular housing having a longitudinal axis and a lens holder pivotally mounted within the tubular housing, the lens holder including a pivot end, and the riflescope including an adjustment device in operative engagement with the lens holder for rotating the lens holder about its pivot end transversely of the longitudinal axis, an improved pivot mount comprising:

2. The improved pivot mount of claim 1 in which the fixed and movable half-sockets and the first and second pivot surfaces are sized and shaped so that rotation of the lens holder about its pivot end transversely of the longitudinal axis results in substantially equal and opposite lateral friction forces at the respective first and second pivot surfaces, thereby preventing the lens holder from walking within the pivot mount.

3. The improved pivot mount of claim 1 in which the resilient member includes a spring, and further comprising a lock ring threaded into the interior of the housing to retain and compress the spring.

4. The improved pivot mount of claim 1, further comprising:

5. The improved pivot mount of claim 4 in which the riflescope has an optical power and further including:

6. The improved pivot mount of claim 1 in which the fixed half-socket is frusto-conical in shape.

7. The improved pivot mount of claim 1 in which the movable half-socket is frusto-conical in shape.

8. The improved pivot mount of claim 1 in which the first and second pivot surfaces are integrated in a ball-shaped joint of the lens holder.

9. The improved pivot mount of claim 1 in which the first and second pivot surfaces comprise at least two oppositely facing frusto-spherical surfaces.

10. A telescopic sight, comprising:

11. The telescopic sight of claim 10 in which:

12. The telescopic sight of claim 10 in which the resilient member includes a spring, and further comprising a lock ring threaded into the bore of the housing to retain and compress the spring.

13. The telescopic sight of claim 10, further comprising:

14. The telescopic sight of claim 10 in which the telescopic sight has an optical power and further comprising:

15. The telescopic sight of claim 10 in which the fixed half-socket is frusto-conical in shape.

16. The telescopic sight of claim 10 in which the movable half-socket is frusto-conical in shape.

17. The telescopic sight of claim 10 in which the pivot end includes a substantially spherical outer surface.

18. The telescopic sight of claim 10 in which the pivot end includes:

19. The telescopic sight of claim 18 in which the fixed half-socket and the movable half-socket are frusto-conical in shape.