Patent US3848442A successfully refreshed from Google Patents.
US3848442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bi-directional cylinder lock
Assignee: Abloy Oy
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Filing: 1973-11-12
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Granted: 1974-11-19
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Expires: 1993-11-12
Abstract
Abstract A cylinder lock mechanism is disclosed comprising a cylinder housing with a cylindrical opening and a cylinder turnable in this opening. At the turning axis of the cylinder there are a plurality of locking discs each provided with a central opening forming the keyway of the lock mechanism. The locking discs are turnable by means of a key of the lock mechanism relative to the cylinder both in clockwise and in counter clockwise direction from a key insertion position into a cylinder-releasing position. The lock mechanism also includes a turnable reset member connected through a slip clutch to the key of the lock when the key is in operating position in the keyway. Turning of the key from its cylinder-releasing position back to its insertion and removal position causes a corresponding turning movement of the reset member which is provided with contact surfaces arranged to engage the locking discs and to return them due to the movement of the reset member to their initial position, allowing removal of the key from the lock mechanism.
Inventors
- 👤 P Mertanen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:37
CPC Classifications
E; E05; E05B; E05B21/00; E05B21/06; E05B21/066; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7559; Y10T70/7588; Y10T70/7627; Y10T70/7633; Y10T70/7667
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
160 words
A cylinder lock mechanism comprising a cylinder housing with a cylindrical opening, a cylinder turnable in said opening and providing at its turning axis a free space for a plurality of locking discs provided with a central opening forming the keyway of the lock mechanism and being turnable by means of a key of the lock mechanism relative to said cylinder both in clockwise and in counter clockwise direction from a key insertion position into a cylinder-releasing position, said lock mechanism including a turnable reset member, connected through a slip clutch to said key of the lock when the key is in operating position in said keyway, so that turning of said key from its cylinder-releasing position back to its insertion position, causes a corresponding turning movement of said reset member which is provided with contact surfaces engaging said locking disc and returning them during said movement to their initial position allowing removal of said key from said lock mechanism.
Claim 2
Dependent Claim
160 words
A cylinder lock mechanism comprising a cylinder housing with a cylindrical opening, a cylinder turnable in said opening and providing at its turning axis a free space for a plurality of locking discs provided with a central opening forming the keyway of the lock mechanism and being turnable by means of a key of the lock mechanism relative to said cylinder both in clockwise and in counter clockwise direction from a key insertion position into a cylinder-releasing position, said lock mechanism including a turnable reset member, connected through a slip clutch to said key of the lock when the key is in operating position in said keyway, so that turning of said key from its cylinder-releasing position back to its insertion position, causes a corresponding turning movement of said reset member which is provided with contact surfaces engaging said locking disc and returning them during said movement to their initial position allowing removal of said key from said lock mechanism.
Claim 3
Dependent Claim
21 words
A lock mechanism according to claim 1, in which said reset member is located in said keyway of the lock mechanism.
Claim 4
Dependent Claim
21 words
A lock mechanism according to claim 1, in which said reset member is located at the periphery of said locking discs.
Claim 5
Dependent Claim
35 words
A lock mechanism according to claim 1, in which said reset member operates in an opening provided in said locking discs between said keyway of the lock mechanism and the periphery of said locking discs.
Claim 6
Dependent Claim
21 words
A lock mechanism according to claim 1, in which said clutch is located at an end portion of said lock cylinder.
Claim 7
Dependent Claim
46 words
A lock mechanism according to claim 1, in which said clutch comprises a first part having a number of recesses and a second part having protruding members fitting into said recesses, and a spring member arranged to press said parts of the clutch towards each other.
Claim 8
Dependent Claim
39 words
A lock mechanism according to claim 1, in which said clutch has several coupling positions, two of which correspond the extreme positions of said key relative to said cylinder and one corresponds to said insertion position of said key.
Claim 9
Dependent Claim
45 words
A lock mechanism according to claim 1, in which each locking disc, in the keyway of the lock mechanism, has a radially inwards extending protrusion having contact surfaces to be engaged by corresponding combination surfaces on said key for turning said discs into cylinder-releasing position.
Claim 10
Dependent Claim
58 words
A lock mechanism according to claim 1, having intermediate discs between said locking discs, which intermediate discs are non-rotatably fixed relative to said cylinder, the radial dimension of said intermediate discs in a direction towards said reset member exceeding the corresponding dimension of said locking discs, thus preventing radial contact between said reset member and said locking discs.
References Cited (Backward Citations)
US3621689A
Cited
US3771340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |