US4512537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Canard control assembly for a projectile
Assignee: Lockheed Martin Corp
•
Filing: 1973-08-10
•
Granted: 1985-04-23
•
Expires: 1993-08-10
Abstract
Abstract Control is provided to conventional gun-fired projectiles by substituting for the standard fuze thereof a device comprising a canard frame and a main housing, which threads into the fuze well of the projectile, with the canard frame being rotatable with respect to the main housing and having deflectable canards thereon for providing vernier correction on the trajectory to the projectile.
Inventors
- 👤 George Sebestyen
- 👤 Ronald R. Sinclair
- 👤 John A. Smith
- 👤 Timothy B. Sands
- 👤 Theodore J. Nussdorfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:11
CPC Classifications
F; F41; F41G; F41G7/00; F41G7/20; F41G7/22; F41G7/222; F41G7/2253; F41G7/2273; F41G7/2293
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
90 words
Apparatus for providing precision correction to the trajectory of a standard gun-fired projectile by providing a device which is adapted to be screwed into the fuze well of the standard projectile, comprising: a main housing having means for inserting same into the fuze well of the gun-fired projectile thereby adapting the projectile to supply guidance thereto; a canard frame coupled to said main housing for relative rotation thereto about the longitudinal axis thereof; said canard frame having deflectable canards thereon; and means for deflecting said canards to guide the projectile.
Claim 2
Dependent Claim
90 words
Apparatus for providing precision correction to the trajectory of a standard gun-fired projectile by providing a device which is adapted to be screwed into the fuze well of the standard projectile, comprising: a main housing having means for inserting same into the fuze well of the gun-fired projectile thereby adapting the projectile to supply guidance thereto; a canard frame coupled to said main housing for relative rotation thereto about the longitudinal axis thereof; said canard frame having deflectable canards thereon; and means for deflecting said canards to guide the projectile.
Claim 3
Dependent Claim
14 words
Apparatus as recited in claim 1, said canard frame further including fixed canards thereon.
Claim 4
Dependent Claim
18 words
Apparatus as recited in claim 2, said canard frame being disposed at the forward portion of said apparatus.
Claim 5
Dependent Claim
52 words
Apparatus as recited in claim 2, wherein said fixed canards are pitched at a slight angle from the line of flight of the projectile such that forces acting thereon despin said canard frame when the projectile is fired thereby generating a relative counter rotation between said canard frame and said main housing.
Claim 6
Dependent Claim
38 words
Apparatus as recited in claim 4, further including means coupling said main housing and said canard frame to generate electrical power from the relative rotation between said main housing and said canard frame when said projectile is fired.
Claim 7
Dependent Claim
48 words
Apparatus as recited in claim 5, further including means for sensing a target and means responsive to said sensing means for rotating said canard frame to align the deflectable canards in a direction whereby said deflecting canards can be used to deflect the projectile in a desired direction.
Claim 8
Dependent Claim
31 words
Apparatus as recited in claim 6, said deflecting canards and said fixed canards each numbering two, each type canard being disposed opposite each other about the periphery of said canard frame.
Claim 9
Dependent Claim
27 words
Apparatus as recited in claim 1, said main housing having external threads thereon such that it can be threaded into the standard fuze well of a projectile.
Claim 10
Dependent Claim
27 words
Apparatus as recited in claim 6, wherein said means for deflecting said deflectable canards includes means responsive to said sensing means and coupled to said deflectable canards.
Claim 11
Dependent Claim
22 words
Apparatus as recited in claim 1 wherein the gun-fired projectile is a spinning projectile, said main housing rotating with the spinning projectile.
References Cited (Backward Citations)
US3000307A
Cited
US3455243A
Cited
US3072365A
Cited
US3065931A
Cited
US3072055A
Cited
US3067681A
Cited
US3111088A
Cited
US3154015A
Cited
US3711040A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-22 | 1988-10-22 | 1989-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-22 | 1992-10-22 | 1993-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-22 | 1996-10-22 | 1997-04-23 | $7700.00 | Window Closed / Lapsed |