US3777520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lock assembly of the rotary cylinder type
Assignee: Securitron Magnalock Corp
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Filing: 1972-06-20
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Granted: 1973-12-11
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Expires: 1992-06-20
Abstract
Abstract A rotary cylinder lock assembly is disclosed which includes a plug having radially extending passages, which plug is rotatably mounted within a cylindrical housing having like passages which are adapted to be aligned with the passages in the plug upon rotation thereof. Spring-biased driver tumbler pins are disposed in the passages in the housing and engage follower tumbler pins disposed in the passages in the plug upon alignment therewith. The follower tumbler pins are conically shaped at their outer ends and are staggered along the plug and extend into a keyreceiving slot extending longitudinally of the plug. The conically shaped ends of some of the pins engage the opposite wall of the slot when the key is not in the slot.
Inventors
- 👤 A Crepinsek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:59
CPC Classifications
E; E05; E05B; E05B27/00; E05B19/00; E05B19/0017; E05B19/0041; E05B19/0052; Y; Y10; Y10S; Y10S70/00; Y10S70/60; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7559; Y10T70/7565; Y10T70/7588; Y10T70/7593; Y10T70/7599; Y10T70/7605; Y10T70/7667; Y10T70/7706; Y10T70/7712; Y10T70/778; Y10T70/7791; Y10T70/7881
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
268 words
A rotary cylinder lock assembly comprising: a generally cylindrical housing having a plurality of spaced elongated radially extending tumbler pin-receiving passages extending therethrough; a generally cylindrical plug rotatably disposed in a generally cylindrical opening extending longitudinally of said housing, said plug also having a plurality of spaced elongated radially extending tumbler pin-receiving passages extending therethrough, said latter passages being adapted to be aligned with said first-mentioned passages upon rotation of said plug within said housing; a key-receiving slot having at least a top and spaced side walls extending longitudinally through said plug for receiving a key therein, said passages in said plug opening into communication with said slot; a plurality of driver tumbler pins slidably disposed in at least some of said passages of said housing; a plurality of follower tumbler pins slidably disposed in at least some of said passages of said plug; spring biasing means disposed in the passages in said housing and engaging said driver tumbler pins for biasing all of said pins in a direction toward said slot; and said follower tumbler pins being staggered longitudinally along said slot and at least some of said follower tumbler pins having generally conically shaped outer ends engaging the side wall of said slot opposite from where the passage in which said follower tumbler pin is disposed opens into said slot when said slot is unobstructed by said key, wherein said side wall engaged by said outer ends of at least some of said follower tumbler pins when said slot is unobstructed includes a plurality of conically shaped depressions therein for receiving said conically shaped outer ends.
Claim 2
Dependent Claim
268 words
A rotary cylinder lock assembly comprising: a generally cylindrical housing having a plurality of spaced elongated radially extending tumbler pin-receiving passages extending therethrough; a generally cylindrical plug rotatably disposed in a generally cylindrical opening extending longitudinally of said housing, said plug also having a plurality of spaced elongated radially extending tumbler pin-receiving passages extending therethrough, said latter passages being adapted to be aligned with said first-mentioned passages upon rotation of said plug within said housing; a key-receiving slot having at least a top and spaced side walls extending longitudinally through said plug for receiving a key therein, said passages in said plug opening into communication with said slot; a plurality of driver tumbler pins slidably disposed in at least some of said passages of said housing; a plurality of follower tumbler pins slidably disposed in at least some of said passages of said plug; spring biasing means disposed in the passages in said housing and engaging said driver tumbler pins for biasing all of said pins in a direction toward said slot; and said follower tumbler pins being staggered longitudinally along said slot and at least some of said follower tumbler pins having generally conically shaped outer ends engaging the side wall of said slot opposite from where the passage in which said follower tumbler pin is disposed opens into said slot when said slot is unobstructed by said key, wherein said side wall engaged by said outer ends of at least some of said follower tumbler pins when said slot is unobstructed includes a plurality of conically shaped depressions therein for receiving said conically shaped outer ends.
Claim 3
Dependent Claim
33 words
The lock assembly of claim 1 wherein said depressions are of a depth sufficient to receive substantially all of the conically shaped outer ends of at least some of said follower tumbler pins.
Claim 4
Dependent Claim
67 words
The lock assembly of claim 1 wherein said spring biasing means includes springs of generally the same strength biasing said pins; and all of said follower tumbler pins being staggered along opposite sides of said slot and extending to the opposite side thereof, at least some of the oppositely staggered pins having their outer ends entering said depressions in the oppositely disposed side walls of said slot.
Claim 5
Dependent Claim
87 words
The lock assembly of claim 1 wherein said spring biasing means includes springs of varying strengths biasing said pins; and the weaker of said springs biasing their respective pins toward said slot in a manner whereby their outer ends are not contiguous with the oppositely disposed side wall of said slot and the stronger of said springs bias their respective pins toward said slot in a manner whereby at least some of their outer ends enter said depressions in the oppositely disposed side wall of said slot.
Claim 6
Dependent Claim
72 words
The lock assembly of claim 2 further including a key adapted to be extended into said slot, said key having a plurality of depressions therein of a depth sufficient to receive at least some of said conically shaped outer ends when inserted into said slot in a manner whereby the junction of said follower tumbler pins with said driver tumbler pins is aligned with the junction of said plug with said housing.
Claim 7
Dependent Claim
99 words
The lock assembly of claim 5 wherein said key is generally rectangular in cross section having elongated spaced side walls, and an elongated top and bottom wall and further includes a tumbler pin engaging end, said pin engaging end having an upper portion extending outwardly from a first elongated side wall of said key toward the other elongated side wall of said key to a first tapered point thereon and a lower portion extending outwardly from the other elongated side wall of said key to the first elongated side wall of said key to a second tapered point thereon.
Claim 8
Dependent Claim
178 words
The lock assembly of claim 5 wherein said housing further includes a plurality of spaced elongated linearly aligned tumbler pin receiving passages extending along the portions of said housing aligned with both the top and bottom of said slot; a plurality of spaced elongated linearly aligned tumbler pin receiving passages extending along the portions of said plug adapted to be aligned with said linearly aligned passages in said housing upon rotation thereof; a plurality of driver tumbler pins slidably disposed in at least some of said linearly aligned passages of said housing; a plurality of follower tumbler pins slidably disposed in at least some of said linearly aligned passages of said plug; spring biasing means disposed in the linearly aligned passages in said housing and engaging said driver tumbler pins for biasing all of said pins in a direction toward said slot; and said follower tumbler pins in said linearly aligned passages in said plug having generally conically shaped outer ends which normally extend a short distance into said slot when said slot is unobstructed by said key.
Claim 9
Dependent Claim
48 words
The lock assembly of claim 7 wherein said key further includes a plurality of spaced depressions of varying depths extending linearly along the top and bottom thereof for receiving therein the conically shaped outer ends of said follower tumbler pins in said linearly aligned passages in said plug.
Claim 10
Dependent Claim
116 words
The lock assembly of claim 5 wherein said plug further includes a blind key freely slidable therein and movable from one end of said slot to the other; blind key linear movement limiting means associated with said plug for limiting the linear movement of said blind key in both directions within said slot; and said blind key having a plurality of depressions therein for receiving therein the conically shaped outer ends of said follower tumbler pins which are aligned with said depressions in said blind key when a key is inserted in either end of said slot to a point whereby the depressions in said key are aligned with the follower tumbler pins in said plug.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |