US3799592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dead bolt auxiliary latch
Assignee: Dexter Lock Co
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Filing: 1972-04-23
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Granted: 1974-03-26
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Expires: 1992-04-23
Abstract
Abstract A dead bolt lock mechanism having a locking bolt extendable by a rotary drive arm and locked into extended position by a special latching means. Spring biasing means acting on the latch holds it in position to thereby allow the mechanism to be mounted in virtually any orientation within a panel. A double latch of the bolt is achieved with a combination of the noted latching means with an over-center latch provided by the rotary drive arm.
Inventors
- 👤 J Babb
- 👤 O Maurits
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:34
CPC Classifications
E; E05; E05B; E05B63/00; E05B63/0017; E05B15/00; E05B15/16; E05B15/1614; E05B15/1621; Y; Y10; Y10S; Y10S292/00; Y10S292/52; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0977; Y10T292/0982; Y10T292/0983; Y10T292/1014; Y10T292/1016
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
In a dead bolt lock construction having a frame; a bolt housing; a bolt shiftable between extended and retracted positions; a bolt extension slidably mounted on said frame coNnected to said bolt, extending along said frame; and actuating means operating on said bolt extension for shifting said bolt between said positions, the improvement comprising: latching means for said bolt shiftable between latching and nonlatching positions to hold said bolt in extended position, said latching means including abutment means on said bolt extension; an arm member slidably received in said bolt extension; means pivotally mounting said arm member on said frame at a rearward portion thereof, said arm member extending toward said bolt and shiftable into abutting relationship with said abutment means when said bolt is in extended position, said actuating means having radially outwardly extending arms thereon straddling said arm member and extending into operative engagement with said bolt extension for shifting same; means for shifting said arm member out of abutting relationship with said abutment means with shifting of said bolt to retracted position.
Claim 2
Dependent Claim
175 words
In a dead bolt lock construction having a frame; a bolt housing; a bolt shiftable between extended and retracted positions; a bolt extension slidably mounted on said frame coNnected to said bolt, extending along said frame; and actuating means operating on said bolt extension for shifting said bolt between said positions, the improvement comprising: latching means for said bolt shiftable between latching and nonlatching positions to hold said bolt in extended position, said latching means including abutment means on said bolt extension; an arm member slidably received in said bolt extension; means pivotally mounting said arm member on said frame at a rearward portion thereof, said arm member extending toward said bolt and shiftable into abutting relationship with said abutment means when said bolt is in extended position, said actuating means having radially outwardly extending arms thereon straddling said arm member and extending into operative engagement with said bolt extension for shifting same; means for shifting said arm member out of abutting relationship with said abutment means with shifting of said bolt to retracted position.
Claim 3
Dependent Claim
51 words
The lock construction as defined in claim 1 wherein said shifting means includes a cam fixed on said actuating means, said arm member engageable with said cam to pivot said arm about said frame in response to movement of said actuating means to thereby shift said latching means between said positions.
Claim 4
Dependent Claim
30 words
The lock construction as defined in claim 2 and further including biasing means operative against said latching means to hold said latching means in abutting relationship with said abutment means.
Claim 5
Dependent Claim
49 words
The apparatus as defined in claim 1 wherein said actuating means comprises a radius arm having one end thereof pivotally mounted in said frame; and cam means extending radially outwardly from said one end for operative engagement with said arm member to shift same between latching and nonlatching positions.
Claim 6
Dependent Claim
47 words
The apparatus as defined in claim 4 and further including means on the other end of said radius arm engaging said bolt extension for shifting same between said positions, said means including engaging means cooperably engageable with said bolt extension for locking said bolt in said positions.
Claim 7
Dependent Claim
56 words
The latch bolt mechanism as defined in claim 3 and further including second latching means for said bolt, said second latching means including second abutment means on said bolt extension cooperably engageable with said extending arm member on said actuator means when said bolt is extended, shiftable out of abutting relationship when said bolt is retracted.
Claim 8
Dependent Claim
63 words
The dead bolt lock construction as defined in claim 6 and further including third latching means for said bolt; third abutment means on said retractor bar for said third latching means, said third latching means including means on said actuating means engageable with said third abutment means when said bolt is retracted holding same in retracted position to thereby prevent inadvertent extension thereof.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |