US4091711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary bolt liquid propellant gun
Assignee: United States Department of the Navy
•
Filing: 1977-05-26
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Granted: 1978-05-30
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Expires: 1997-05-26
Abstract
Abstract A liquid propellant gun loading, propellant injection and firing mechanismharacterized by a rotating breech block having a generally spherical contour. The breech block is intermittently rotated to and locked in sequential loading, fuel injection and firing positions.
Inventors
- 👤 Gary L. Petersen
- 👤 John W. Holtrop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:26
CPC Classifications
F; F41; F41A; F41A1/00; F41A1/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
197 words
A liquid propellant gun breech loading, injection and firing mechanism comprising; a liquid propellant gun body including a rearward loading portion, a forward barrel portion and a rotatable breech block intermediate said rearward and forward portion; said gun body having oppositely facing contoured portions between said rearward and forward portion; said rotatable breech block mechanism comprising contoured surfaces complimentary to said contoured surfaces on said rearward loading and forward barrel portions so that said breech block may be closely confined between said contoured surfaces for rotary motion around an axis perpendicular to the axis of said barrel portion; said breech block further comprising a fuel transfer housing having a cylindrical inner bore coaxial with said rotational axis for receiving therein a fuel transfer tube; said breech block further comprising a central bore, at least one injection valve mechanism and at least one firing device each having an axis of symmetry within a plane passing through the barrel axis and perpendicular to the axis of said fuel transfer housing; and means for incrementally moving said breech block to serially position said bore, said injection valve mechanism and said firing mechanism respectively in line and register with said barrel.
Claim 2
Dependent Claim
197 words
A liquid propellant gun breech loading, injection and firing mechanism comprising; a liquid propellant gun body including a rearward loading portion, a forward barrel portion and a rotatable breech block intermediate said rearward and forward portion; said gun body having oppositely facing contoured portions between said rearward and forward portion; said rotatable breech block mechanism comprising contoured surfaces complimentary to said contoured surfaces on said rearward loading and forward barrel portions so that said breech block may be closely confined between said contoured surfaces for rotary motion around an axis perpendicular to the axis of said barrel portion; said breech block further comprising a fuel transfer housing having a cylindrical inner bore coaxial with said rotational axis for receiving therein a fuel transfer tube; said breech block further comprising a central bore, at least one injection valve mechanism and at least one firing device each having an axis of symmetry within a plane passing through the barrel axis and perpendicular to the axis of said fuel transfer housing; and means for incrementally moving said breech block to serially position said bore, said injection valve mechanism and said firing mechanism respectively in line and register with said barrel.
Claim 3
Dependent Claim
52 words
The apparatus of claim 1 wherein said breech block contains diametrically opposed injector valve mechanisms and two diametrically opposed igniter mechanisms and wherein the axis of symmetry of said injector valve mechanisms and said igniter devices are spaced thirty degrees from the axis of symmetry of said bore and from each other.
Claim 4
Dependent Claim
16 words
The apparatus of claim 1 wherein said contoured surfaces of said breech block are substantially spherical.
Claim 5
Dependent Claim
28 words
The apparatus of claim 1 wherein said means for incrementally moving said breech block is a six lobed Geneva-type mechanism locking said breech block in six respective positions.
Claim 6
Dependent Claim
53 words
The apparatus of claim 4 wherein said breech block contains two diametrically opposed injector valve mechanisms and two diametrically opposed igniter mechanisms and wherein the axis of symmetry of said injector valve mechanisms and said igniter devices are space thirty degrees from the axis of symmetry of said bore and from each other.
Claim 7
Dependent Claim
16 words
The apparatus of claim 5 wherein said contoured surfaces of said breech block are substantially spherical.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |