US4669186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Twin bladed survival knife
Assignee: Individual
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Filing: 1985-06-12
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Granted: 1987-06-02
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Expires: 2005-06-12
Abstract
Abstract A twin bladed survival knife having a pair of knife blades and a hollow handle incorporating a plurality of separate compartments for containment of sundry survival objects. The knife has a secondary blade affixed to the handle and a hollow primary blade disposed telescopically over the secondary blade and connected releasably to the handle. A spring actuated, slidable detent disposed in the handle is operative to securely connect the primary blade to the handle and, upon being depressed, is operative to permit removal of the primary blade from the handle. The several compartments in the handle may contain a compass, a fishing reel, an electric light bulb and batteries for furnishing electric power to the bulb. A pivotal, longitudinally extending door on the handle provides access to at least some of the compartments in the handle. A hollow end cap is releasably affixed to the handle and includes one of the compartments as well as a lens for permitting visual access to the end cap compartment.
Inventors
- 👤 Nan T. Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:58
CPC Classifications
F; F21; F21V; F21V33/00; F21V33/0064; B; B26; B26B; B26B11/00; B26B11/008; F21V33/0004; F21V33/0024; F21V33/0036
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
189 words
A twin bladed survival knife having a pair of knife blades and a hollow handle, said handle including an enlarged finger guard disposed adjacent said blades, comprising (a) a secondary blade affixed to the handle, (b) a hollow primary blade adapted to be disposed telescopically over the secondary blade and connected releasably to the handle, (c) notches disposed on the primary blade for connecting said blade to the interior of the handle, (d) retractable detent means disposed internally of the handle operable to engage the primary blade notches and securely connect the primary blade to the handle, (e) said detent means being movable to disengage said notches to permit removal of the primary blade from the handle, (f) a plurality of separate compartments disposed within the handle for containment of sundry survival objects, (g) a door mounted pivotally on the handle and extending longitudinally thereof, said pivotal door providing access to at least one of said storage compartments and (h) an end cap attached releasably to the handle at a location remote from the finger guard, said end cap including an interior compartment for containment of a survival object.
Claim 2
Dependent Claim
189 words
A twin bladed survival knife having a pair of knife blades and a hollow handle, said handle including an enlarged finger guard disposed adjacent said blades, comprising (a) a secondary blade affixed to the handle, (b) a hollow primary blade adapted to be disposed telescopically over the secondary blade and connected releasably to the handle, (c) notches disposed on the primary blade for connecting said blade to the interior of the handle, (d) retractable detent means disposed internally of the handle operable to engage the primary blade notches and securely connect the primary blade to the handle, (e) said detent means being movable to disengage said notches to permit removal of the primary blade from the handle, (f) a plurality of separate compartments disposed within the handle for containment of sundry survival objects, (g) a door mounted pivotally on the handle and extending longitudinally thereof, said pivotal door providing access to at least one of said storage compartments and (h) an end cap attached releasably to the handle at a location remote from the finger guard, said end cap including an interior compartment for containment of a survival object.
Claim 3
Dependent Claim
67 words
The knife of claim 1, further including: (a) a compartment disposed in the finger guard for containment of an electric light bulb, (b) a bulb disposed in said compartment, (c) batteries disposed in one of said separate compartments aforesaid, said battery compartment being accessed to by means of the pivotal door aforesaid, and (d) electric conductors connecting said batteries to said bulb to provide electric power thereto.
Claim 4
Dependent Claim
31 words
The knife of claim 1 further including a compartment disposed in the finger guard for containment of a rotatable fishing reel, said compartment includng a pivotal closure for closing said compartment.
Claim 5
Dependent Claim
18 words
The knife of claim 1 further including a compass disposed in the interior compartment of the end cap.
Claim 6
Dependent Claim
51 words
The knife of claim 1 having at least five of said separate compartments including (a) a compartment for containment of a compass, (b) a compartment for containment of a fishing reel, (c) a compartment for containment of an electric light bulb and (d) a compartment for containment of electric storage batteries.
Claim 7
Dependent Claim
57 words
The knife of claim 1 wherein (a) the primary blade is insertable into and removable from the handle in a direction longitudinally of the handle and (b) the retractable detent is disposed transversely of the knife handle within the enlarged finger guard thereof, (c) said detent being spring biased and slidable laterally relative to the primary blade.
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) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |