Patent US4280725A successfully refreshed from Google Patents.
US4280725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety closure system
Assignee: Kason Industries Inc
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Filing: 1979-02-06
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Granted: 1981-07-28
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Expires: 1999-02-06
Abstract
Abstract The present invention provides a safety door-mounted latch mechanism available and accessible from within an enclosure that is normally locked by means of the door. A freezer or refrigerator door, for example, may be provided with the latch which is capable of being locked from the outside by means of either a padlock or an integral cylinder which receives a key. A radial tongue of the latch cooperatively engages a striker mechanism. The result is the ability of a person otherwise trapped within the enclosure to reach safety. A novel linkage-type of mechanism having a plurality of pivot points translates rectilinear actuating movement into an arcuate movement of the tongue or keeper member.
Inventors
- 👤 Irving L. Berkowitz
- 👤 John J. Bourgeois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:06
CPC Classifications
E; E05; E05B; E05B65/00; E05B65/0042; E05B15/00; E05B15/02; E05B15/0205; E05B15/024; E05B15/025; E05B65/0053; Y; Y10; Y10S; Y10S292/00; Y10S292/71; Y10T; Y10T292/00; Y10T292/08; Y10T292/1043; Y10T292/1051; Y10T292/1052; Y10T292/1055
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
287 words
A safety latch assembly for use with enclosures or the like, comprising, in combination: a housing; a handle carried by said housing and movable between locking and unlocking positions; a keeper member carried by said housing and having portions thereof remote from said handle and normally movable into and out of a predetermined path of interference with strike means as a result of said handle movement; a lever member supported within said housing and being movable between locking and unlocking positions, and link means disposed within said housing for interconnecting said lever and keeper members, said link means being movable between locking and unlocking positions under the influence of said handle and said lever member, said lever member and said link means being responsive to forces of an actuating member moved from within said enclosure and without the influence of said handle for moving said link means from said locking position to said unlocking position, thereby removing said keeper member portions from said path of interference; means for biasing said link means and lever member toward their respective locking positions; and lock means for preventing said handle movement, said latch assembly further comprising padlock means for receiving a padlock for preventing said handle movement, a key-operated locking assembly including a portion thereof movable into the path of said unlocking movement of a portion of said link means to prevent influencing of said keeper member by said handle when in a locked position, said keeper member portions being movable from said path of interference in response to forces of said actuating member notwithstanding either the presence of a padlock in said padlock means or the presence of said locking assembly portions in said unlocking movement path or both.
Claim 2
Dependent Claim
287 words
A safety latch assembly for use with enclosures or the like, comprising, in combination: a housing; a handle carried by said housing and movable between locking and unlocking positions; a keeper member carried by said housing and having portions thereof remote from said handle and normally movable into and out of a predetermined path of interference with strike means as a result of said handle movement; a lever member supported within said housing and being movable between locking and unlocking positions, and link means disposed within said housing for interconnecting said lever and keeper members, said link means being movable between locking and unlocking positions under the influence of said handle and said lever member, said lever member and said link means being responsive to forces of an actuating member moved from within said enclosure and without the influence of said handle for moving said link means from said locking position to said unlocking position, thereby removing said keeper member portions from said path of interference; means for biasing said link means and lever member toward their respective locking positions; and lock means for preventing said handle movement, said latch assembly further comprising padlock means for receiving a padlock for preventing said handle movement, a key-operated locking assembly including a portion thereof movable into the path of said unlocking movement of a portion of said link means to prevent influencing of said keeper member by said handle when in a locked position, said keeper member portions being movable from said path of interference in response to forces of said actuating member notwithstanding either the presence of a padlock in said padlock means or the presence of said locking assembly portions in said unlocking movement path or both.
Claim 3
Dependent Claim
29 words
A latch assembly according to claim 1, wherein said housing is formed with an opening exposing said lever member to movement of an actuating member from within the enclosure.
Claim 4
Dependent Claim
47 words
A latch assembly according to claim 1, further including a lock assembly carried by said housing and having a locking member movable into the path of said unlocking movement of a portion of said link means, thereby preventing the influencing of said keeper member by said handle.
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) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |