US4779511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposal dearmer for EOD applications
Assignee: United States Department of the Navy
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Filing: 1985-07-09
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Granted: 1988-10-25
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Expires: 2005-07-09
Abstract
Abstract A disposable EOD dearmer (10) includes an propellant charge (36) permanen affixed to a tubular body (14) for propelling a dearmer slug (40) against a dud casing (12). The pressure versus time characteristic (60, 70) of the charge can be selected to provide a preselected velocity for the slug at impact with the casing, and the initial position (60', 70") of the slug can be selected to provide a preselected delay between ignition of the charge and impact between the slug and the casing.
Inventors
- 👤 Paul W. Proctor
- 👤 Robert L. Dow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:20
CPC Classifications
F; F42; F42B; F42B33/00; F42B33/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A method of dearming explosive ordnance by disabling a fuze inside a casing thereof comprising the steps of: selecting a open ended elongatged tubular body of lightweight, non-magnetic material; selecting an appropriate charge for the tubular body fore for use against particular ordnance; positioning a dearmer slug in the tubular body bore in front of the explosive charge and at a distance therefrom selected to provide upon detonation of the charge an appropriate pressure build up versus time to provide delay time between detonation of the charge and impact of the slug on the casing; attaching the body to a casing with the open end in the vicinity of the fuze to be disabled; and firing the charge to expell the slug out the open end at a velocity and delay just sufficient to disable the fuze inside the casing of that particular ordnance.
Claim 2
Independent Claim
144 words
A method of dearming explosive ordnance by disabling a fuze inside a casing thereof comprising the steps of: selecting a open ended elongatged tubular body of lightweight, non-magnetic material; selecting an appropriate charge for the tubular body fore for use against particular ordnance; positioning a dearmer slug in the tubular body bore in front of the explosive charge and at a distance therefrom selected to provide upon detonation of the charge an appropriate pressure build up versus time to provide delay time between detonation of the charge and impact of the slug on the casing; attaching the body to a casing with the open end in the vicinity of the fuze to be disabled; and firing the charge to expell the slug out the open end at a velocity and delay just sufficient to disable the fuze inside the casing of that particular ordnance.
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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) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |