US4007615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Key controlled pick resistant lock
Assignee: Individual
•
Filing: 1976-06-01
•
Granted: 1977-02-15
•
Expires: 1996-06-01
Abstract
Abstract A push key type lock mechanism which requires insertion and removal of the key for operating of the associated bolt. The lock mechanism includes an anti-picking device which requires complete key insertion for operation of the lock mechanism to prevent trial and error picking of the lock.
Inventors
- 👤 Knut Nossum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:26
CPC Classifications
E; E05; E05B; E05B35/00; E05B35/006; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/752; Y10T70/7531; Y10T70/7757; Y10T70/778; Y10T70/7791; Y10T70/7842; Y10T70/7859
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
289 words
A lock mechanism operated upon insertion and removal of a key comprising, an enclosing housing and a transversely extending housing containing a latch therein, a shaft mounted in the first housing, an inner cylindrical member journaled on said shaft and having a plurality of spaced apertures therein, a hood carried by said shaft and encircling said inner cylindrical member, said hood having a window therein, an outer cylindrical member journaled on said hood and having a plurality of apertures therein with a spring biased pin mounted in each aperture; said pins being slidably positioned through said outer cylindrical member and adapted to engage the apertures in the inner cylindrical member through said window in said hood; a keyway in said first housing; a key having a surface with a plurality of sequential indentations therein which when inserted into the keyway engage the exposed ends of the pins in the outer cylindrical member to rotate the outer cylindrical member urging said pins into engagement with the apertures with the inner cylindrical member to rotate the inner cylindrical member simultaneously therewith; means included in the inner cylindrical member and the shaft to prevent rotation of the inner and outer cylindrical members in the event the apertures in the key do not cause predetermined engagement of the pins with the inner cylindrical member; means included in part in said enclosing and in part in said outer cylindrical member to prevent rotation of the outer cylindrical member except in a predetermined time sequence with the insertion of said key; and means included in part in said inner cylindrical member and in part with the latch to cause operation of the latch upon complete insertion of the key and subsequent withdrawal of the key.
Claim 2
Dependent Claim
289 words
A lock mechanism operated upon insertion and removal of a key comprising, an enclosing housing and a transversely extending housing containing a latch therein, a shaft mounted in the first housing, an inner cylindrical member journaled on said shaft and having a plurality of spaced apertures therein, a hood carried by said shaft and encircling said inner cylindrical member, said hood having a window therein, an outer cylindrical member journaled on said hood and having a plurality of apertures therein with a spring biased pin mounted in each aperture; said pins being slidably positioned through said outer cylindrical member and adapted to engage the apertures in the inner cylindrical member through said window in said hood; a keyway in said first housing; a key having a surface with a plurality of sequential indentations therein which when inserted into the keyway engage the exposed ends of the pins in the outer cylindrical member to rotate the outer cylindrical member urging said pins into engagement with the apertures with the inner cylindrical member to rotate the inner cylindrical member simultaneously therewith; means included in the inner cylindrical member and the shaft to prevent rotation of the inner and outer cylindrical members in the event the apertures in the key do not cause predetermined engagement of the pins with the inner cylindrical member; means included in part in said enclosing and in part in said outer cylindrical member to prevent rotation of the outer cylindrical member except in a predetermined time sequence with the insertion of said key; and means included in part in said inner cylindrical member and in part with the latch to cause operation of the latch upon complete insertion of the key and subsequent withdrawal of the key.
Claim 3
Dependent Claim
26 words
The lock mechanism of claim 1 in which the means to prevent rotation of the inner and outer cylindrical members is a slot in the shaft.
Claim 4
Dependent Claim
25 words
The lock mechanism of claim 1 in which the window in the hood has a limited arcuate extent and is exposed only adjacent the keyway.
Claim 5
Dependent Claim
71 words
The lock mechanism of claim 2 in which the pins in the outer cylindrical member are advanced into the inner cylindrical member to rotate the same only if the apertures in the key are of a predetermined dimension and in which the pins slide through the apertures in the inner cylindrical member and engage the slot if the depth of the apertures in the key are less than a predetermined dimension.
Claim 6
Dependent Claim
48 words
The lock mechanism of claim 1 in which the means included in the outer cylindrical member and in part in the enclosing housing preventing rotation of the outer cylindrical member is a non-magnetic pendulum suspended from the outer cylindrical member and cooperating with detents in the enclosing housing.
Claim 7
Dependent Claim
40 words
The lock mechanism of claim 5 in which the detents in the enclosing housing have sloped surfaces in the direction permitting counter-rotation of the outer cylindrical member at any timed sequence upon withdrawal of the key from the lock mechanism.
Claim 8
Dependent Claim
81 words
The lock mechanism in claim 1 in which the means included in part on the inner cylindrical member and in part on the latch includes a first and second gear member mounted respectively in the enclosing housing and the transversely extending housing and including detent means on the inner cylindrical member cooperating with gripper means on the first gear causing the first gear member to be driven by the inner cylindrical member in a predetermined direction of movement with key withdrawal.
Claim 9
Dependent Claim
38 words
The lock mechanism of claim 7 in which the second gear member includes a pivoted lever attached to the latch and rotating with the second gear member through slightly greater than 180° with each withdrawal of the key.
Claim 10
Dependent Claim
16 words
The lock mechanism of claim 8 in which the first and second gear members rotate unidirectionally.
Claim 11
Dependent Claim
52 words
The lock mechanism of claim 1 in which the latch means includes a pivoted lever attached to the end of a bolt and a second bolt pivoted thereon to slide into an angular flanged recess in the transversely extending housing with the bolt sliding in the end of the transversely extending housing.
Claim 12
Dependent Claim
35 words
The lock mechanism of claim 10 and including spring means positioned between the enclosing housing and the outer cylindrical member biasing the outer cylindrical member in a direction opposite the rotation caused by key insertion.
Claim 13
Dependent Claim
21 words
The lock mechanism of claim 1 in which the spring biased pins in the outer cylindrical member are of different lengths.
Claim 14
Dependent Claim
41 words
The lock mechanism of claim 12 in which the spring biased pin has a spring positioned in an aperture in the outer cylindrical member encircling the pin and bearing against the flange on the pin and against the outer cylindrical member.
Claim 15
Dependent Claim
21 words
The lock mechanism of claim 1 in which the apertures in the inner cylindrical member extends through the inner cylindrical member.
Claim 16
Dependent Claim
21 words
The lock mechanism of claim 2 in which the slot in the shaft is positioned behind the window in the hood.
Claim 17
Dependent Claim
31 words
The lock mechanism of claim 1 in which the apertures in the inner and outer cylindrical members are aligned with respect to one another and staggered with respect to one another.
Claim 18
Dependent Claim
248 words
A lock mechanism operated upon insertion and removal of a key comprising, an enclosing housing and a transversely extending housing containing a latch therein, a shaft mounted in the first housing, an inner cylindrical member journaled on said shaft and having a plurality of spaced apertures therein, a hood carried by said shaft and encircling said inner cylindrical member, said hood having a window therein, an outer cylindrical member journaled on said hood and having a plurality of apertures therein with a spring biased pin mounted in each aperture, said pins being slidably positioned through said outer cylindrical member and adapted to engage the apertures in the inner cylindrical member through said window in said hood; a keyway in said first housing; a key having a surface with a plurality of sequential indentations therein which when inserted into the keyway engage the exposed ends of the pins in the outer cylindrical member to rotate the outer cylindrical member urging said pins into engagement with the apertures with the inner cylindrical member to rotate the inner cylindrical member simultaneously therewith; means included in part in said enclosing and in part in said outer cylindrical member to prevent rotation of the outer cylindrical member except in a predetermined time sequence with the insertion of said key; and means included in part in said inner cylindrical member and in part with the latch to cause operation of the latch upon complete insertion of the key and subsequent withdrawal of the key.
Claim 19
Dependent Claim
248 words
A lock mechanism operated upon insertion and removal of a key comprising, an enclosing housing and a transversely extending housing containing a latch therein, a shaft mounted in the first housing, an inner cylindrical member journaled on said shaft and having a plurality of spaced apertures therein, a hood carried by said shaft and encircling said inner cylindrical member, said hood having a window therein, an outer cylindrical member journaled on said hood and having a plurality of apertures therein with a spring biased pin mounted in each aperture, said pins being slidably positioned through said outer cylindrical member and adapted to engage the apertures in the inner cylindrical member through said window in said hood; a keyway in said first housing; a key having a surface with a plurality of sequential indentations therein which when inserted into the keyway engage the exposed ends of the pins in the outer cylindrical member to rotate the outer cylindrical member urging said pins into engagement with the apertures with the inner cylindrical member to rotate the inner cylindrical member simultaneously therewith; means included in part in said enclosing and in part in said outer cylindrical member to prevent rotation of the outer cylindrical member except in a predetermined time sequence with the insertion of said key; and means included in part in said inner cylindrical member and in part with the latch to cause operation of the latch upon complete insertion of the key and subsequent withdrawal of the key.
Claim 20
Dependent Claim
254 words
A lock mechanism operated upon insertion and removal of a key comprising, an enclosing housing and a transversely extending housing containing a latch therein, a shaft mounted in the first housing, an inner cylindrical member journaled on said shaft and having a plurality of spaced apertures therein, a hood carried by said shaft and encircling said inner cylindrical member, said hood having a window therein, an outer cylindrical member journaled on said hood and having a plurality of apertures therein with a spring biased pin mounted in each aperture, said pins being slidably positioned through said outer cylindrical member and adapted to engage the apertures in the inner cylindrical member through said window in said hood; a keyway in said first housing; a key having a surface with a plurality of sequential indentations therein when inserted into the keyway to engage the exposed ends of the pins in the outer cylindrical member to rotate the outer cylindrical member urging said pins into engagement with the apertures with the inner cylindrical member to rotate the inner cylindrical member simultaneously therewith; means included in the inner cylindrical member and the shaft to prevent rotation of the inner and outer cylindrical members in the event the apertures in the key do not cause predetermined engagement of the pins with the inner cylindrical member; and means included in part in said inner cylindrical member and in part with the latch to cause operation of the latch upon complete insertion of the key and subsequent withdrawal of the key.
Claim 21
Dependent Claim
254 words
A lock mechanism operated upon insertion and removal of a key comprising, an enclosing housing and a transversely extending housing containing a latch therein, a shaft mounted in the first housing, an inner cylindrical member journaled on said shaft and having a plurality of spaced apertures therein, a hood carried by said shaft and encircling said inner cylindrical member, said hood having a window therein, an outer cylindrical member journaled on said hood and having a plurality of apertures therein with a spring biased pin mounted in each aperture, said pins being slidably positioned through said outer cylindrical member and adapted to engage the apertures in the inner cylindrical member through said window in said hood; a keyway in said first housing; a key having a surface with a plurality of sequential indentations therein when inserted into the keyway to engage the exposed ends of the pins in the outer cylindrical member to rotate the outer cylindrical member urging said pins into engagement with the apertures with the inner cylindrical member to rotate the inner cylindrical member simultaneously therewith; means included in the inner cylindrical member and the shaft to prevent rotation of the inner and outer cylindrical members in the event the apertures in the key do not cause predetermined engagement of the pins with the inner cylindrical member; and means included in part in said inner cylindrical member and in part with the latch to cause operation of the latch upon complete insertion of the key and subsequent withdrawal of the key.
Claim 22
Dependent Claim
248 words
A lock mechanism operated upon insertion and removal of a key comprising, an enclosing housing and a transversely extending housing containing a latch therein, a shaft mounted in the first housing, an inner cylindrical member journaled on said shaft and having a plurality of spaced apertures therein, a hood carried by said shaft and encircling said inner cylindrical member, said hood having a window therein, an outer cylindrical member journaled on said hood and having a plurality of apertures therein with a spring biased pin mounted in each aperture, said pins being slidably positioned through said outer cylindrical member and adapted to engage the apertures in the inner cylindrical member through said window in said hood; a keyway in said first housing; a key having a surface with a plurality of sequential indentations therein which when inserted into the keyway engage the exposed ends of the pins in the outer cylindrical member to rotate the outer cylindrical member urging said pins into engagement with the apertures with the inner cylindrical member to rotate the inner cylindrical member simultaneously therewith; and means included in part in said inner cylindrical member and in part with the latch to cause operation of the latch upon complete insertion of the key and subsequent withdrawal of the key; and means coupling the inner cylindrical member to said latch after the inner and outer cylindrical members have been rotated with complete key insertion and upon the withdrawal of the key to operate the latch.
Claim 23
Dependent Claim
248 words
A lock mechanism operated upon insertion and removal of a key comprising, an enclosing housing and a transversely extending housing containing a latch therein, a shaft mounted in the first housing, an inner cylindrical member journaled on said shaft and having a plurality of spaced apertures therein, a hood carried by said shaft and encircling said inner cylindrical member, said hood having a window therein, an outer cylindrical member journaled on said hood and having a plurality of apertures therein with a spring biased pin mounted in each aperture, said pins being slidably positioned through said outer cylindrical member and adapted to engage the apertures in the inner cylindrical member through said window in said hood; a keyway in said first housing; a key having a surface with a plurality of sequential indentations therein which when inserted into the keyway engage the exposed ends of the pins in the outer cylindrical member to rotate the outer cylindrical member urging said pins into engagement with the apertures with the inner cylindrical member to rotate the inner cylindrical member simultaneously therewith; and means included in part in said inner cylindrical member and in part with the latch to cause operation of the latch upon complete insertion of the key and subsequent withdrawal of the key; and means coupling the inner cylindrical member to said latch after the inner and outer cylindrical members have been rotated with complete key insertion and upon the withdrawal of the key to operate the latch.
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) | 1980-02-15 | 1980-08-16 | 1981-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-15 | 1984-08-16 | 1985-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-15 | 1988-08-16 | 1989-02-15 | $7700.00 | Window Closed / Lapsed |