US3597949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antitheft lock device
Assignee: Individual
•
Filing: 1970-04-28
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Granted: 1971-08-10
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Expires: 1990-04-28
Abstract
Abstract A vehicle trunk-locking system having a latching mechanism and including a frangible tail extension member coupled to a lock cylinder, the tail extension being adapted to engage the latching mechanism to operate a locking latch. Unauthorized removal of a lock cylinder from the vehicle will fracture the tail extension member leaving a portion thereof within the latching mechanism to thereby prevent insertion of an instrument into the latching mechanism for operating the locking latch.
Inventors
- 👤 Gus T Nigrelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:13
CPC Classifications
E; E05; E05B; E05B17/00; E05B17/0054; E05B17/0058; E05B17/0062; E05B83/00; E05B83/16; Y; Y10; Y10T; Y10T70/00; Y10T70/20; Y10T70/70; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7559; Y10T70/7588; Y10T70/7915; Y10T70/7949
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
An antitheft lock device locking system comprising a lock cylinder housing mounted in a body, a lock cylinder rotatably positioned within the housing, a latching mechanism spaced from the lock cylinder, frangible tail extension insertable into the latching mechanism for operating same, flexible coupling means for attaching said tail extension to the lock cylinder, retaining means for securing said tail extension within the latching mechanism such that upon unauthorized forcible removal of the lock cylinder and housing from the vehicle body, the frangible tail extension will fracture leaving a portion thereof within the latching mechanism to thereby prevent the insertion of a burglary tool into said latching mechanism to operate same.
Claim 2
Dependent Claim
111 words
An antitheft lock device locking system comprising a lock cylinder housing mounted in a body, a lock cylinder rotatably positioned within the housing, a latching mechanism spaced from the lock cylinder, frangible tail extension insertable into the latching mechanism for operating same, flexible coupling means for attaching said tail extension to the lock cylinder, retaining means for securing said tail extension within the latching mechanism such that upon unauthorized forcible removal of the lock cylinder and housing from the vehicle body, the frangible tail extension will fracture leaving a portion thereof within the latching mechanism to thereby prevent the insertion of a burglary tool into said latching mechanism to operate same.
Claim 3
Dependent Claim
63 words
An antitheft lock device as claimed in claim 1, wherein the frangible tail extension has a latch-release-receiving end and a lock-cylinder-receiving end and further comprising a zigzag section intermediate said ends defining at least one angular stress concentration portion whereat said tail extension will be fracturable upon the application of an axial tensile force sufficient to remove the cylinder housing from the body.
Claim 4
Dependent Claim
49 words
An antitheft lock device as claimed in claim 2, wherein the coupling means is flexible and comprises a notch formed in the lock-cylinder-receiving end of the tail extension member, and a bifurcated portion on said lock cylinder for engagement with the lock-cylinder-receiving end and cooperating means engaging the notch.
Claim 5
Dependent Claim
39 words
An antitheft lock device as claimed in claim 3, further including a biasing spring for rotating the lock cylinder to an idle position and also for retaining the lock-cylinder-receiving end of the tail extension member within the bifurcated portion.
Claim 6
Dependent Claim
35 words
An antitheft lock device as claimed in claim 4, further including a rotatable latch release within the latching mechanism, said latch release having a slotted opening accommodating the latch-release-receiving end of the tail extension member.
Claim 7
Dependent Claim
34 words
An antitheft lock device as claimed in claim 5, wherein the retaining means includes a clampinG ring positioned on the tail extension adjacent the latch release for retaining said member within the latch release.
Claim 8
Dependent Claim
53 words
An antitheft lock device as claimed in claim 6, wherein a clamping ring is positioned between the latch release and the lock cylinder, the latch release end of the tail extension member extends through the latch release and a further clamping ring is positioned between the latch release end and the latch release.
Claim 9
Dependent Claim
35 words
An antitheft lock device as claimed in claim 7, wherein the tail extension member contains at least one pivotal connection for providing pivotal movement for the tail extension to permit alignment with the latch release.
Claim 10
Dependent Claim
42 words
An antitheft lock device as claimed in claim 8, wherein the tail extension member contains two pivotal connections on opposite sides of the zigzag section and disposed at 90* to each other to thus provide universal movement for the tail extension movement.
Claim 11
Dependent Claim
39 words
An antitheft lock device as claimed in claim 9, wherein the clamping ring includes a slotted opening, the tail extension member being positioned within said opening and a setscrew within the clamping ring bearing against the tail extension member.
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |