Patent US3667264A successfully refreshed from Google Patents.
US3667264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lock core
Assignee: Newfrey LLC
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Filing: 1970-02-10
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Granted: 1972-06-06
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Expires: 1990-02-10
Abstract
Abstract A removable or interchangeable figure-8 pin tumbler lock core adapted to be received and locked in a housing and for operating an associated lock mechanism. The core has a body supporting a key plug and a locking element arranged for limited angular movement relative to the body and the key plug to lock the core in or release it from the housing when a control key is inserted in the plug. The lock mechanism is operated by inserting an operating key to rotate the plug relative to the body without effecting movement of the locking element. A line of shear between the locking element and the body is formed by a planar surface of the body and an arcuate surface of the locking element generally tangent thereto. Lugs on the locking element cooperate with grooves in the body to prevent escape of pin tumblers from the locking element or the body when the locking element is rotated between its locking and releasing positions.
Inventors
- 👤 Walter E Surko Jr
- 👤 James W Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:01
CPC Classifications
E; E05; E05B; E05B9/00; E05B9/08; E05B9/084; E05B9/086; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7559; Y10T70/7638; Y10T70/765
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
434 words
A lock core adapted to be received and locked in a housing and for operating an associated lock mechanism comprising a body having a cylindrical bore extending longitudinally therein and including a recess communicating with said bore and partially defined by a generally planar surface parallel to the axis of said bore, a generally cylindrical key plug received in said bore, means for retaining said plug in assembly with said body for rotation therein, a locking element received in said recess and having an outwardly projecting locking shoulder and arcuate inner and outer surface portions generally concentric with the surface of said plug, said arcuate inner surface portion in mating engagement with the surface of said plug, said arcuate outer surface portion generally tangent to said planar surface, pin tumbler holes extending through said locking element and into said body at general points of tangency between said planar surface and said arcuate outer surface portion and extending into said key plug, said planar surface and said arcuate outer surface portion forming one line of shear between said body and said locking element where said tumbler holes intersect said planar surface and said arcuate outer surface portion, said inner surface portion and said plug surface forming another line of shear between said plug and said locking element where said pin tumbler holes intersect said inner surface portion and said plug surface, a stack of pin tumblers received in each of said pin tumbler holes and having breaks between the individual tumblers thereof, said pin tumblers being adapted for movement to one position wherein one of said breaks is aligned with said one line of shear by insertion of one key in said plug to permit rotation of said locking element with said plug and relative to said body between a locking position wherein said shoulder is disposed in one location relative to said body and engagable with the housing to prevent removal of the core therefrom and a releasing position wherein said shoulder is disposed in another location relative to said body to permit insertion of said core into said housing and removal of said core therefrom, said pin tumblers being adapted for movement to another position wherein one of said breaks is aligned with said other line of shear by insertion of another key in said plug to permit rotation of said plug relative to said locking element and said body for operating the lock mechanism, and means for preventing escape of said pin tumblers from said locking element and said body when said locking element is rotated between its locking and releasing positions.
Claim 2
Dependent Claim
434 words
A lock core adapted to be received and locked in a housing and for operating an associated lock mechanism comprising a body having a cylindrical bore extending longitudinally therein and including a recess communicating with said bore and partially defined by a generally planar surface parallel to the axis of said bore, a generally cylindrical key plug received in said bore, means for retaining said plug in assembly with said body for rotation therein, a locking element received in said recess and having an outwardly projecting locking shoulder and arcuate inner and outer surface portions generally concentric with the surface of said plug, said arcuate inner surface portion in mating engagement with the surface of said plug, said arcuate outer surface portion generally tangent to said planar surface, pin tumbler holes extending through said locking element and into said body at general points of tangency between said planar surface and said arcuate outer surface portion and extending into said key plug, said planar surface and said arcuate outer surface portion forming one line of shear between said body and said locking element where said tumbler holes intersect said planar surface and said arcuate outer surface portion, said inner surface portion and said plug surface forming another line of shear between said plug and said locking element where said pin tumbler holes intersect said inner surface portion and said plug surface, a stack of pin tumblers received in each of said pin tumbler holes and having breaks between the individual tumblers thereof, said pin tumblers being adapted for movement to one position wherein one of said breaks is aligned with said one line of shear by insertion of one key in said plug to permit rotation of said locking element with said plug and relative to said body between a locking position wherein said shoulder is disposed in one location relative to said body and engagable with the housing to prevent removal of the core therefrom and a releasing position wherein said shoulder is disposed in another location relative to said body to permit insertion of said core into said housing and removal of said core therefrom, said pin tumblers being adapted for movement to another position wherein one of said breaks is aligned with said other line of shear by insertion of another key in said plug to permit rotation of said plug relative to said locking element and said body for operating the lock mechanism, and means for preventing escape of said pin tumblers from said locking element and said body when said locking element is rotated between its locking and releasing positions.
Claim 3
Dependent Claim
44 words
A lock core as set forth in claim 1 wherein said body has grooves formed therein and said locking element has outwardly projecting lugs thereon extending into said grooves, said lugs and said grooves comprising said means for preventing escape of said pin tumblers.
Claim 4
Dependent Claim
91 words
A lock core as set forth in claim 2 wherein said grooves extend transversely of said body in axially spaced relation and open through said planar surface, each of said grooves intersecting an associated one of said pin tumbler holes, and said locking element has a plurality of pairs of axially spaced lugs, each of said pairs including two circumaxially spaced radially outwardly extending lugs, said lugs comprising each of said pairs extending into an associated one of said grooves at opposite sides of an associated one of said pin tumblers.
Claim 5
Dependent Claim
23 words
A lock core as set forth in claim 1 including means for limiting rotation of said element between said locking and releasing position.
Claim 6
Dependent Claim
27 words
A lock core as set forth in claim 2 wherein said lugs cooperate with said pin tumbleRs and comprise means for limiting rotation of said locking element.
Claim 7
Dependent Claim
30 words
A lock core as set forth in claim 4 wherein said body and said locking element have coengageable abutment surfaces thereon, said abutment surfaces comprising said means for limiting rotation.
Claim 8
Dependent Claim
44 words
A lock core as set forth in claim 1 wherein said recess comprises a downwardly opening notch, said planar surface defines the upper surface of said notch, and said locking element comprises a generally cylindrical part surrounding an associated portion of said key plug.
Claim 9
Dependent Claim
45 words
A lock core as set forth in claim 1 wherein said shoulder in said locking position is disposed outside of said recess and projects outwardly beyond the peripheral surface of said body and said shoulder in said releasing position is disposed wholly within said recess.
Claim 10
Dependent Claim
36 words
A lock core as set forth in claim 1 wherein said recess comprises a generally rectangular opening extending transversely through said body and opening through opposite sides thereof and said locking element comprises a parti-cylindrical part.
Claim 11
Dependent Claim
33 words
A lock core as set forth in claim 9 including means for preventing escape of pin tumblers from said plug when said plug is rotated relative to said locking element and said body.
Claim 12
Dependent Claim
87 words
A lock core as set forth in claim 10 wherein said locking element has a plurality of axially spaced apart circumaxially extending fingers and said body has a plurality of notches formed therein, each of said notches being adapted to receive an associated one of said fingers when said locking element is rotated to said locking position, said fingers and said notches comprising said means for preventing escape of pin tumblers from said plug when said plug is rotated relative to said locking element and said body.
Claim 13
Dependent Claim
34 words
A lock core as set forth in claim 3 including means for limiting rotation of said locking element between said locking and releasing position and for preventing said lugs from engaging said pin tumblers.
Claim 14
Dependent Claim
43 words
A lock core as set forth in claim 12 wherein said body and said locking element have coengageable abutment surfaces thereon, said abutment surfaces comprising said means for limiting rotation of said locking element and preventing said lugs from engaging said pin tumblers.
Claim 15
Dependent Claim
44 words
A lock core as set forth in claim 13 wherein said planar surface comprises the upper surface of said recess and said coengageable abutment surfaces are defined by generally upwardly facing surfaces on said body and generally downwardly facing surfaces on said locking element.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |