US3783737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal
Assignee: General Electric Co
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Filing: 1972-02-04
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Granted: 1974-01-08
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Expires: 1992-02-04
Abstract
Abstract A liquid propellant gun is provided with a seal and a multi diametered chamber which centripetally deflects the seal to generate a preseating force thereon.
Inventors
- 👤 E Ashley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:04
CPC Classifications
F; F41; F41A; F41A3/00; F41A3/64; F41A3/74; F42; F42B; F42B14/00; F42B14/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
310 words
A combustion apparatus comprising: a vessel having a substantially cylindrical chamber therein, said chamber having an internal wall having an aft entrance portion merging into a forward firing portion, said aft entrance portion having an aft, initial, internal diameter and a forward, final diameter, said initial diameter being greater than said final diameter; a piston for obturating said forward portion of said chamber, said piston having a resilient, integral, annular seal mounted thereon, said seal being transversely annular, with substantially triangular longitudinal cross-section, having an outer annular, approximately cylindrical face and an aft, annular, approximately transverse face, said outer face having a forward-most annular edge, which in the free state of said seal is greater in external diameter than the remaInder of said outer face, and which in the free state is less than said initial internal diameter of said chamber and greater than said final internal diameter of said chamber; whereby, as said piston is advanced longitudinally forwardly through said entrance portion of said chamber, said forwardmost annular edge of said seal and only said forward-most annular edge engages said wall of said chamber, and the external diameter of said forward-most annular edge is progressively reduced thereby, providing a continuous edge sealing between said seal and said wall; and said piston has a forward facing transverse surface aft of and adjacent to said seal; said aft, annular, approximately transverse face of said seal having an inner annular edge which in the free state of said seal is longitudinally forward of the remainder of said aft face, whereby, as said external diameter of said forward-most annular edge of said seal is progressively reduced, said inner annular edge is displaced progressively longitudinally aft, and said inner annular edge, and only said inner annular edge engages said forward facing transverse surface, providing a continuous edge sealing between said seal and said surface.
Claim 2
Dependent Claim
310 words
A combustion apparatus comprising: a vessel having a substantially cylindrical chamber therein, said chamber having an internal wall having an aft entrance portion merging into a forward firing portion, said aft entrance portion having an aft, initial, internal diameter and a forward, final diameter, said initial diameter being greater than said final diameter; a piston for obturating said forward portion of said chamber, said piston having a resilient, integral, annular seal mounted thereon, said seal being transversely annular, with substantially triangular longitudinal cross-section, having an outer annular, approximately cylindrical face and an aft, annular, approximately transverse face, said outer face having a forward-most annular edge, which in the free state of said seal is greater in external diameter than the remaInder of said outer face, and which in the free state is less than said initial internal diameter of said chamber and greater than said final internal diameter of said chamber; whereby, as said piston is advanced longitudinally forwardly through said entrance portion of said chamber, said forwardmost annular edge of said seal and only said forward-most annular edge engages said wall of said chamber, and the external diameter of said forward-most annular edge is progressively reduced thereby, providing a continuous edge sealing between said seal and said wall; and said piston has a forward facing transverse surface aft of and adjacent to said seal; said aft, annular, approximately transverse face of said seal having an inner annular edge which in the free state of said seal is longitudinally forward of the remainder of said aft face, whereby, as said external diameter of said forward-most annular edge of said seal is progressively reduced, said inner annular edge is displaced progressively longitudinally aft, and said inner annular edge, and only said inner annular edge engages said forward facing transverse surface, providing a continuous edge sealing between said seal and said surface.
Claim 3
Dependent Claim
37 words
A combustion apparatus according to claim 1 wherein: said chamber aft entrance portion has a negative taper from its aft initial diameter to said final diameter, said final diameter, being the diameter of said forward firing portion.
Claim 4
Dependent Claim
26 words
A combustion apparatus according to claim 1 wherein: said apparatus is a gun; said vessel is a gun barrel; and said piston is a gun bolt.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |