Patent US3060988A successfully refreshed from Google Patents.
Patent US3698182A successfully refreshed from Google Patents.
Patent US4402516A successfully refreshed from Google Patents.
US4402516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fully consumable remotely operated seal
Assignee: United States Department of the Navy
•
Filing: 1983-01-03
•
Granted: 1983-09-06
•
Expires: 2003-01-03
Abstract
Abstract A method for sealing ports, ducts and the like using a fully consumable mrial as the sealing medium and utilizing the consumable capability to provide remote removal of the seal without damage to the sealed areas and with no remaining obstruction in the port, duct or the like. The fully consumable seal may be configured to the geometry of the aperture to be sealed and has thickness determined by pressure difference across the seal and time required to remove the seal.
Inventors
- 👤 Werner A. Gans
- 👤 Frank G. Borgardt
- 👤 George A. Lo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:32
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/40; Y; Y10; Y10S; Y10S277/00; Y10S277/931; Y10S277/933; Y10S277/935; Y10S277/944; Y10T; Y10T156/00; Y10T156/11
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
110 words
A technique for sealing apertures of varying geometric configurations such that the seal may be removed remotely and completely in a non-explosive manner and without requiring oxygen comprising the steps of: (a) fabricating a mounting frame configured to hermetically fit within said aperture, said mounting frame having substantially the same open area as said aperture; (b) forming a piece of fully consumable material such that said material fits within said mounting frame; (c) locating said mounting frame holding said fully consumable material within said aperture; and (d) attaching an ignitor to said frame such that said ignitor is in direct communication with said consumable material and may be activated remotely.
Claim 2
Dependent Claim
110 words
A technique for sealing apertures of varying geometric configurations such that the seal may be removed remotely and completely in a non-explosive manner and without requiring oxygen comprising the steps of: (a) fabricating a mounting frame configured to hermetically fit within said aperture, said mounting frame having substantially the same open area as said aperture; (b) forming a piece of fully consumable material such that said material fits within said mounting frame; (c) locating said mounting frame holding said fully consumable material within said aperture; and (d) attaching an ignitor to said frame such that said ignitor is in direct communication with said consumable material and may be activated remotely.
Claim 3
Dependent Claim
24 words
A seal as recited in claim 1 wherein said consumable material is a propellant chosen from the class of nitrocelluloseammonium perchlorate or polybutadiene-ammonium perchlorate-diisocyanate.
Claim 4
Dependent Claim
25 words
A seal as recited in claim 1 wherein said consumable material is an intermetallic composite chosen from the class of palladium-aluminum, platinum-aluminum, titanium-boron or zirconium-boron.
Claim 5
Dependent Claim
15 words
A seal as recited in claim 1 wherein said consumable material is polyurethane with RDX.
References Cited (Backward Citations)
US1815418A
Cited
US3088478A
Cited
US3472254A
Cited
US3109553A
Cited
US3638573A
Cited
US3861690A
Cited
US3777772A
Cited
US3860678A
Cited
US3869132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-05 | 1987-03-07 | 1987-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-05 | 1991-03-07 | 1991-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-05 | 1995-03-07 | 1995-09-06 | $7700.00 | Window Closed / Lapsed |