Patent US5092780A successfully refreshed from Google Patents.
Patent US3804441A successfully refreshed from Google Patents.
US3804441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door latch mechanism
Assignee: Nissan Motor Co Ltd
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Filing: 1972-08-28
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Granted: 1974-04-16
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Expires: 1992-08-28
Abstract
Abstract Herein disclosed is an improved door latch mechanism for typical use on the door of a motor vehicle. The latch mechanism has a toothed latch element and a detent means which has a pawl engageable with the toothed latch element. The latch element has unlatched, half-latched and fully latched positions and is moved for rotation by a striker which is fast on the vehicle body. The pivotal movement of the detent means relative to the latch element is controlled by combined actions of a lever arrangement which can be manually operable from the inside of the vehicle by the use of a garnish button or from the outside of the door with or without use of a key.
Inventors
- 👤 F Kobayashi
- 👤 K Sasai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:48
CPC Classifications
E; E05; E05B; E05B85/00; E05B85/20; E05B85/24; E05B85/243; E05B77/00; E05B77/14; E05B77/18; Y; Y10; Y10S; Y10S292/00; Y10S292/26; Y10T; Y10T292/00; Y10T292/08; Y10T292/1043; Y10T292/1044; Y10T292/1045; Y10T292/1047
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
497 words
A door latch mechanism comprising, in combination, a body block, a latch element pivoted on said block and including a ratchet portion having unlatched, half-latched and fully latched positions which are angularly spaced from each other, first biasing means for urging said latch element to turn from the fully latched position to the unlatched position through the half-latched position, a detent means pivoted on said block and having a pawl portion engageable with said ratchet portion of the latch element for holding the latch element in any one of said positions, said detent means having first and second abutments which are rotatable about an axis of rotation of the detent means, second biasing means for urging said detent means into engagement with said ratchet portion of the latch element, a locking lever pivoted on said block and movable between locked and unlocked positions, a connecting member rotatable on said locking lever and substantially linearly movable with concurrent rotation of said locking lever, said connecting member having an unlocking abutment and an unlatching abutment which are respectively engageable with said first and second abutments of said detent means, a detent actuating lever pivoted on said block and movable between latching and unlatching positions, third biasing means for urging said detent actuating lever to turn froM said unlatching position to said latching position, said connecting member movably engaging said detent actuating lever, said unlatching abutment of said connecting member engaging said first abutment of said detent means for turning the detent means out of engagement with said ratchet portion of said latch element when said detent actuating lever is turned to the unlatching position with said locking lever in said unlocked position, thereby allowing the latch element to turn by the action of said first biasing means, said unlatching abutment of the connecting member being moved out of alignment with said first abutment of the detent means when said locking lever is turned to the locked position, said unlocking abutment of said connecting member being in alignment with said second abutment of said detent means when said detent actuating lever is in said latching position and concurrently said locking lever is in said locked position, said unlocking abutment being out of alignment with said second abutment when said detent actuating lever is in said unlatching position with said locking lever in said locked position, and cam means on said latch element for turning the latch element from said unlatched position to said fully latched position when said latch mechansim is operated for a latched condition, and in which said latch element and said detent means are carried on one face of said block and said locking lever, said detent actuating lever and said connecting member are carried on the other face of the block and in which said first and second abutments of said detent means are in the form of lateral extensions which project appreciably from said other face of the block through slots formed in the block.
Claim 2
Dependent Claim
497 words
A door latch mechanism comprising, in combination, a body block, a latch element pivoted on said block and including a ratchet portion having unlatched, half-latched and fully latched positions which are angularly spaced from each other, first biasing means for urging said latch element to turn from the fully latched position to the unlatched position through the half-latched position, a detent means pivoted on said block and having a pawl portion engageable with said ratchet portion of the latch element for holding the latch element in any one of said positions, said detent means having first and second abutments which are rotatable about an axis of rotation of the detent means, second biasing means for urging said detent means into engagement with said ratchet portion of the latch element, a locking lever pivoted on said block and movable between locked and unlocked positions, a connecting member rotatable on said locking lever and substantially linearly movable with concurrent rotation of said locking lever, said connecting member having an unlocking abutment and an unlatching abutment which are respectively engageable with said first and second abutments of said detent means, a detent actuating lever pivoted on said block and movable between latching and unlatching positions, third biasing means for urging said detent actuating lever to turn froM said unlatching position to said latching position, said connecting member movably engaging said detent actuating lever, said unlatching abutment of said connecting member engaging said first abutment of said detent means for turning the detent means out of engagement with said ratchet portion of said latch element when said detent actuating lever is turned to the unlatching position with said locking lever in said unlocked position, thereby allowing the latch element to turn by the action of said first biasing means, said unlatching abutment of the connecting member being moved out of alignment with said first abutment of the detent means when said locking lever is turned to the locked position, said unlocking abutment of said connecting member being in alignment with said second abutment of said detent means when said detent actuating lever is in said latching position and concurrently said locking lever is in said locked position, said unlocking abutment being out of alignment with said second abutment when said detent actuating lever is in said unlatching position with said locking lever in said locked position, and cam means on said latch element for turning the latch element from said unlatched position to said fully latched position when said latch mechansim is operated for a latched condition, and in which said latch element and said detent means are carried on one face of said block and said locking lever, said detent actuating lever and said connecting member are carried on the other face of the block and in which said first and second abutments of said detent means are in the form of lateral extensions which project appreciably from said other face of the block through slots formed in the block.
Claim 3
Dependent Claim
469 words
A door latch mechanism comprising, in combination, a body block, a latch element pivoted on said block and including a ratchet portion having unlatched, half-latched and fully latched positions which are angularly spaced from each other, first biasing means for urging said latch element to turn from the fully latched position to the unlatched position through the half-latched position, a detent means pivoted on said block and having a pawl portion engageable with said ratchet portion of the latch element for holding the latch element in any one of said positions, said detent means having first and second abutments which are rotatable about an axis of rotation of the detent means, second biasing means for urging said detent means into engagement with said ratchet portion of the latch element, a locking lever pivoted on said block and movable between locked and unlocked positions, a connecting member rotatable on said locking lever and substantially linearly movable with concurrent rotation of said locking lever, said connecting member having an unlocking abutment and an unlatching abutment which are respectively engageable with said first and second abutments of said detent means, a detent actuating lever pivoted on said block and movable between latching and unlatching positions, third biasing means for urging said detent actuating lever to turn from said unlatching position to said latching position, said connecting member movably engaging said detent actuating lever, said unlatching abutment of said connecting member engaging said first abutment of said detent means for turning the detent means out of engagement with said ratchet portion of said latch element when said detent actuating lever is turned to the unlatching position with said locking lever in said unlocked position, thereby allowing the latch element to turn by the action of said first biasing means, said unlatching abutment of the connecting member being moved out of alignment with said first abutment of the detent means when said locking lever is turned to the locked position, said unlocking abutment of said connecting member being in alignment with said second abutment of said detent means when said detent actuating lever is in said latching position and concurrently said locking lever is in said locked pOsition, said unlocking abutment being out of alignment with said second abutment when said detent actuating lever is in said unlatching position with said locking lever in said locked position, and cam means on said latch element for turning the latch element from said unlatched position to said fully latched position when said latch mechanism is operated for a latched condition, and in which said detent actuating lever has therein a slot which is elongated substantially in the direction of the linear movement of said connecting member and in which said connecting member has a pin which is slidable in said slot in the detent actuating lever.
Claim 4
Dependent Claim
469 words
A door latch mechanism comprising, in combination, a body block, a latch element pivoted on said block and including a ratchet portion having unlatched, half-latched and fully latched positions which are angularly spaced from each other, first biasing means for urging said latch element to turn from the fully latched position to the unlatched position through the half-latched position, a detent means pivoted on said block and having a pawl portion engageable with said ratchet portion of the latch element for holding the latch element in any one of said positions, said detent means having first and second abutments which are rotatable about an axis of rotation of the detent means, second biasing means for urging said detent means into engagement with said ratchet portion of the latch element, a locking lever pivoted on said block and movable between locked and unlocked positions, a connecting member rotatable on said locking lever and substantially linearly movable with concurrent rotation of said locking lever, said connecting member having an unlocking abutment and an unlatching abutment which are respectively engageable with said first and second abutments of said detent means, a detent actuating lever pivoted on said block and movable between latching and unlatching positions, third biasing means for urging said detent actuating lever to turn from said unlatching position to said latching position, said connecting member movably engaging said detent actuating lever, said unlatching abutment of said connecting member engaging said first abutment of said detent means for turning the detent means out of engagement with said ratchet portion of said latch element when said detent actuating lever is turned to the unlatching position with said locking lever in said unlocked position, thereby allowing the latch element to turn by the action of said first biasing means, said unlatching abutment of the connecting member being moved out of alignment with said first abutment of the detent means when said locking lever is turned to the locked position, said unlocking abutment of said connecting member being in alignment with said second abutment of said detent means when said detent actuating lever is in said latching position and concurrently said locking lever is in said locked pOsition, said unlocking abutment being out of alignment with said second abutment when said detent actuating lever is in said unlatching position with said locking lever in said locked position, and cam means on said latch element for turning the latch element from said unlatched position to said fully latched position when said latch mechanism is operated for a latched condition, and in which said detent actuating lever has therein a slot which is elongated substantially in the direction of the linear movement of said connecting member and in which said connecting member has a pin which is slidable in said slot in the detent actuating lever.
Claim 5
Dependent Claim
37 words
A door latch mechanism as claimed in claim 1, further including cover plates which are respectively attached to the both faces of said body block, thereby enclosing therebetween the operating members which are located in the block.
Claim 6
Dependent Claim
56 words
A door latch mechanism as claimed in claim 3, in which each of said latch element and said detent means is carried on one of said cover plates through a headless pin and each of said locking lever and said detent actuating lever is carried on the other of said cover plates through a headless pin.
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) | 1977-04-15 | 1977-10-15 | 1978-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-15 | 1981-10-15 | 1982-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-15 | 1985-10-15 | 1986-04-16 | $7700.00 | Window Closed / Lapsed |