Patent US3974671A successfully refreshed from Google Patents.
US3974671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder locks
Assignee: Individual
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Filing: 1975-02-13
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Granted: 1976-08-17
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Expires: 1995-02-13
Abstract
Abstract A cylinder lock comprises two barrels in axial alignment on either side of a web. Each barrel is formed as two opposed elements disposed in either side of a longitudinal plane in which the keyhole is formed by confronting surfaces of the opposed elements. The web is engageable with internal end parts of the barrel elements and each barrel comprises tumblers received in the barrel and operable by a key inserted in the keyhole. A one-piece lock block has a central recess through which the web passes and two rectangular parts on either side of the recess each having a narrow top surface contiguous with one of the barrels. Pins are received in bores in the lock block and the pins are spring-biased to lock the barrels when the key is absent. Two housing members each engage over one of the rectangular parts and the corresponding barrel to maintain the barrels in contact with these parts.
Inventors
- 👤 Charles Rossetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:03
CPC Classifications
E; E05; E05B; E05B9/00; E05B9/04; E05B9/041; E05B9/042; E05B27/00; E05B27/0003; E05B27/0007; E05B27/0014; E05B9/10; Y; Y10; Y10S; Y10S70/00; Y10S70/60; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7559; Y10T70/7667; Y10T70/7684; Y10T70/7706; Y10T70/7712
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
202 words
A cylinder lock comprising two barrels in axial alignment, each barrel being formed as two opposed elements disposed on either side of a longitudinal plane, a web between the barrels and engageable with internal end parts of the barrel elements, the barrels being in alignment on either side of the web and each barrel comprising tumblers received in the barrel and operable by a key engageable in a longitudinal keyhole slot in the barrel, the keyhole slot lying in said longitudinal plane and confronting surfaces of said opposed elements forming the keyhole slot, a lock block formed in one piece and comprising a central recess through which the web is able to pass and two parts of generally rectangular cross section on either side of the central recess, each having a narrow top surface contiguous with one of the barrels pins received in bores in the lock block extending to the latter surfaces, the pins being spring-biased so that the pins normally engage in recesses in the barrels to lock the same when the key is absent, and two housing members each engaging over one of said rectangular parts and the corresponding barrel to maintain the barrels in contact with said parts.
Claim 2
Dependent Claim
202 words
A cylinder lock comprising two barrels in axial alignment, each barrel being formed as two opposed elements disposed on either side of a longitudinal plane, a web between the barrels and engageable with internal end parts of the barrel elements, the barrels being in alignment on either side of the web and each barrel comprising tumblers received in the barrel and operable by a key engageable in a longitudinal keyhole slot in the barrel, the keyhole slot lying in said longitudinal plane and confronting surfaces of said opposed elements forming the keyhole slot, a lock block formed in one piece and comprising a central recess through which the web is able to pass and two parts of generally rectangular cross section on either side of the central recess, each having a narrow top surface contiguous with one of the barrels pins received in bores in the lock block extending to the latter surfaces, the pins being spring-biased so that the pins normally engage in recesses in the barrels to lock the same when the key is absent, and two housing members each engaging over one of said rectangular parts and the corresponding barrel to maintain the barrels in contact with said parts.
Claim 3
Dependent Claim
73 words
A lock as set forth in claim 1 wherein each of the housing members is formed with a recess having a top portion in the form of a hollow cylinder extending right through the housing and in which the barrel is received, and a bottom portion which is substantially rectangular in cross section and which extends to an inside surface of the housing in which the corresponding part of the block is received.
Claim 4
Dependent Claim
52 words
A lock as set forth in claim 2 wherein a rib which projects from the narrow top surface of said part of said lock block and which is engaged in a groove in the corresponding barrel determines the axial position of each barrel relative to the corresponding part of said lock block.
Claim 5
Dependent Claim
17 words
A lock set forth in claim 1 wherein the lock block is made of sintered powder metal.
Claim 6
Dependent Claim
54 words
A lock as set forth in claim 1, which additionally comprises lengthwise extending ribs on said barrel elements by way of which said elements abut one another, said ribs cooperating to define the top surface of the keyhole slot, two semicylindrical recesses provided one in each of the barrel elements defining the barrel recesses.
Claim 7
Dependent Claim
19 words
A lock as set forth in claim 1, wherein the two barrel elements are made of sintered powdered metal.
References Cited (Backward Citations)
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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) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |