US3768189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking device for narrow openings
Assignee: Individual
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Filing: 1971-12-06
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Granted: 1973-10-30
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Expires: 1991-12-06
Abstract
Abstract A locking device for narrow openings in which an expandable member is disposed about the shaft of a combination lock mechanism. The combination lock mechanism includes an inner cylinder carrying the shaft and an outer cylinder into which the inner cylinder is threaded. Rotation of the shaft and inner cylinder will cause the inner cylinder to be threaded into the outer cylinder and thus drawn inwardly into the combination lock. This will result in axial compression of the expandable member which, in turn, results in circumferential expansion thereof, so that the expandable member will be urged into pressure engagement with the interior of the narrow opening. The lock mechanism is further adapted to prevent rotation of the shaft and inner cylinder, unless the combination lock is opened, to prevent unauthorized use of the locking device.
Inventors
- 👤 R Goodrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:03
CPC Classifications
B; B65; B65D; B65D55/00; B65D55/02; B65D55/14; F; F41; F41A; F41A17/00; F41A17/44; Y; Y10; Y10T; Y10T70/00; Y10T70/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
100 words
A firearm barrel lock for a firearm having a barrel communicating with a shell chamber comprising a shaft, an expandable member dimensioned to be received in said barrel disposed about said shaft, a stop attached to one end of said shaft adjacent said expandable member and lock means disposed on the otHer end of said shaft, said lock means having locked and unlocked states, in said unlocked state said lock means being movable axially relative said shaft to permit axial compression and expansion of said expandable member and in said locked state said lock means being fixed relative said shaft.
Claim 2
Dependent Claim
100 words
A firearm barrel lock for a firearm having a barrel communicating with a shell chamber comprising a shaft, an expandable member dimensioned to be received in said barrel disposed about said shaft, a stop attached to one end of said shaft adjacent said expandable member and lock means disposed on the otHer end of said shaft, said lock means having locked and unlocked states, in said unlocked state said lock means being movable axially relative said shaft to permit axial compression and expansion of said expandable member and in said locked state said lock means being fixed relative said shaft.
Claim 3
Dependent Claim
43 words
Apparatus according to claim 1, wherein said lock means comprises a threaded member attached to said shaft, a mating member threadably engaging said threaded member and means for preventing relative rotation between said threaded member and said mating member in said locked state.
Claim 4
Dependent Claim
88 words
Apparatus according to claim 2 wherein said means for preventing relative rotation comprises a lock body slidably disposed about said mating member, tumbler means for engaging said mating member to prevent sliding thereof relative said lock body in said locked state, a collar rotatably engaging said threaded member disposed between said expandable member and said lock body and abutting said lock body in said locked state, said collar and said lock body including registration means to prevent relative rotation when said collar and said lock body are abutting.
Claim 5
Dependent Claim
89 words
Apparatus according to claim 3 wherein said mating member is substantially cylindrical and includes at least one protuberance, and wherein said tumbler means comprises at least one tumbler ring rotatably carried in said lock body having a substantially cylindrical opening disposed about said mating member, said opening including a notch dimensioned to clear said protuberance, said tumbler ring being aligned with said protuberance abutting said tumbler ring in said locked state and said tumbler ring being aligned with said notch and said protuberance in registration in said unlocked state.
Claim 6
Dependent Claim
33 words
Apparatus according to claim 4 comprising indicia means to characterize the rotational positions of said tumbler ring whereby a particular indicia will be associated with the registration of said notch and said protuberance.
Claim 7
Dependent Claim
38 words
Apparatus according to claim 1 comprising an extension shaft threadably mounted to said one end of said shaft, said extension shaft being of a length suitable to extend through said barrel into the shell chamber of said firearm.
Claim 8
Dependent Claim
131 words
A firearm barrel lock comprising a shaft, an expandable member disposed about said shaft, a stop attached to one end of said shaft adjacent said expandable member, an inner lock cylinder attached to the other end of said shaft, an outer lock cylinder threadably engaging said inner lock cylinder, a lock body slidably disposed about said outer cylinder, a collar rotatably engaging said inner lock cylinder disposed between said expandable member and said lock body and abutting said lock body in said locked state, said collar and said lock body including registration means to prevent relative rotation thereof when said collar and said lock body are abutting and tumbler means having locked and unlocked states, in said locked state said tumbler means engaging said outer cylinder to prevent axial movement thereof.
Claim 9
Dependent Claim
131 words
A firearm barrel lock comprising a shaft, an expandable member disposed about said shaft, a stop attached to one end of said shaft adjacent said expandable member, an inner lock cylinder attached to the other end of said shaft, an outer lock cylinder threadably engaging said inner lock cylinder, a lock body slidably disposed about said outer cylinder, a collar rotatably engaging said inner lock cylinder disposed between said expandable member and said lock body and abutting said lock body in said locked state, said collar and said lock body including registration means to prevent relative rotation thereof when said collar and said lock body are abutting and tumbler means having locked and unlocked states, in said locked state said tumbler means engaging said outer cylinder to prevent axial movement thereof.
Claim 10
Dependent Claim
79 words
Apparatus according to claim 7 wherein said outer cylinder includes at least one protuberance and said tumbler means comprises at least one tumbler ring carried in said lock body, said tumbler ring having a substantially cylindrical opening disposed about said outer lock cylinder, said opening including a notch dimensioned to clear said protuberance, said protuberance abutting said tumbler ring in said locked and said tumbler ring aligned with said notch and said protuberance in registration in said unlocked state.
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |