Patent US3738279A successfully refreshed from Google Patents.
US3738279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sabot for sub-calibre projectile
Assignee: United States Department of the Navy
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Filing: 1970-07-24
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Granted: 1973-06-12
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Expires: 1990-07-24
Abstract
Abstract A sabot for locating a finned missile in a rifled gun barrel, consisting of a rear sealing ring, an intermediate wedge unit and a front petal unit. The sealing ring and wedge unit have peripheral grooves to slidably fit a rifled barrel and the petal unit has a smooth periphery for sliding engagement with lands of the rifling. The petal unit and the wedge unit each consists of a set of separable complemental segments and the two units have complementally frusto-conical adjacent end faces so that the wedge segments are urged outwardly and the petal segments inwardly by a forward axial force on the sealing ring.
Inventors
- 👤 F Eyre
- 👤 F Groundwater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:55
CPC Classifications
F; F42; F42B; F42B14/00; F42B14/02; F42B14/06; F42B14/061; F42B14/067; Y; Y10; Y10S; Y10S102/00; Y10S102/703
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
169 words
A sabot for locating a finned missile in a rifled barrel comprising, in combination: a rear sealing ring of elastometric material adapted to seal against the missile and having a grooved periphery for slidable sealing engagement with a rifled barrel; an intermediate wedge unit disposed forwardly of said sealing ring and also having a grooved periphery for sliding engagement with a rifled barrel, said wedge unit comprising a set of separable complemental wedge segments; a front petal unit disposed forwardly of said wedge unit for sliding engagement with the lands of a rifled barrel and comprising a set of separable complemental petal segments, the rear of said petal unit and the front of said wedge unit having complemental frusto-conical faces slanting forwardly and outwardly so that the wedge segments may be urged outwardly and the petal segments inwardly by a forward axial force acting on said sealing ring; and a slip washer interposed between said complemental frustoconical faces to permit relative rotation of said petal, unit and wedge unit.
Claim 2
Dependent Claim
169 words
A sabot for locating a finned missile in a rifled barrel comprising, in combination: a rear sealing ring of elastometric material adapted to seal against the missile and having a grooved periphery for slidable sealing engagement with a rifled barrel; an intermediate wedge unit disposed forwardly of said sealing ring and also having a grooved periphery for sliding engagement with a rifled barrel, said wedge unit comprising a set of separable complemental wedge segments; a front petal unit disposed forwardly of said wedge unit for sliding engagement with the lands of a rifled barrel and comprising a set of separable complemental petal segments, the rear of said petal unit and the front of said wedge unit having complemental frusto-conical faces slanting forwardly and outwardly so that the wedge segments may be urged outwardly and the petal segments inwardly by a forward axial force acting on said sealing ring; and a slip washer interposed between said complemental frustoconical faces to permit relative rotation of said petal, unit and wedge unit.
Claim 3
Dependent Claim
23 words
The device as defined in claim 1 wherein the leading edges of the grooves of said wedge unit are provided with reversed bevels.
Claim 4
Dependent Claim
28 words
The device as defined in claim 1 wherein said sealing ring is provided at the rear thereof with flared lips for sealing against the barrel and the missile.
Claim 5
Dependent Claim
50 words
The device as defined in claim 1 which is further characterized in that the number of segments in said wedge unit is different from the number of segments in said petal unit, and radial interfaces between the wedge segments are always circumferentially spaced from radial interfaces between the petal segments.
Claim 6
Dependent Claim
19 words
The device as defined in claim 4 which is further characterized in that said radial interfaces are complementally serrated.
Claim 7
Dependent Claim
20 words
The device as defined in claim 1 which is further characterized in that said petal unit is made of metal.
Claim 8
Dependent Claim
21 words
The device as defined in claim 1 which is further characterized in that said wedge unit is made of plastic material.
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |