US3917329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lock
Assignee: Pioneer Audio Corp
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Filing: 1973-07-30
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Granted: 1975-11-04
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Expires: 1993-07-30
Abstract
Abstract A lock comprises a latch bolt, a working member to be retracted into the lock when a door is closed, a spring for retracting the latch bolt and a spring for returning the latch bolt so repulsive energy is accumulated in the springs by the working member, and a release member for releasing the accumulated energy in the springs. By this releasing of energy, the latch bolt is moved to a retracted position to be unlocked. When the door is opened, another accumulated energy is released, the latch bolt and the working member return to their original projected positions. A casing for the lock comprises an inner casing inserted in notched portions of the door, a pair of outer casings having nipping portions which are touchable with marginal portions of opening of the notched portion, and attaching members to attach the outer casings to the inner casings. The outer casings are attached to the inner casings so as to put the marginal portions of opening of the notched portion strongly between their nipping portions.
Inventors
- 👤 Masaru Fujiki
- 👤 Masahiro Yoshida
- 👤 Hiroshi Fukuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:29
CPC Classifications
E; E05; E05B; E05B55/00; Y; Y10; Y10S; Y10S292/00; Y10S292/37; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0977; Y10T292/098; Y10T292/0999; Y10T292/1003; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5372; Y10T70/80; Y10T70/8432; Y10T70/8459
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
231 words
A lock for latching a door, comprising in combination: a casing; a latch bolt and a working member reciprocatably supported by the casing and movable between a projected position wherein said latch bolt projects from said casing for latching the door and a retracted position wherein said latch bolt is retracted into said casing; an interlocking member having one end connected to the latch bolt and another end located on a line of action of the working member; latch spring means disposed between the interlocking member and the latch bolt and coacting with said interlocking member to bias the latch bolt in the direction of its projection; spring means for retracting the latch bolt and being interconnected between said another end of said interlocking member and the working member; trigger means for releasably blocking movement of the interlocking member in such a manner that a certain repulsive force is accumulated in said spring means for retracting the latch bolt as the working member is retracted when the door is closed, and upon releasing of the interlocking member, effecting release of the spring means for retracting the latch bolt so as to move the latch bolt to its retracted position; and another spring means disposed between the working member and the casing and operable when the door is opened to return the latch bolt and the working member to the projected position.
Claim 2
Dependent Claim
231 words
A lock for latching a door, comprising in combination: a casing; a latch bolt and a working member reciprocatably supported by the casing and movable between a projected position wherein said latch bolt projects from said casing for latching the door and a retracted position wherein said latch bolt is retracted into said casing; an interlocking member having one end connected to the latch bolt and another end located on a line of action of the working member; latch spring means disposed between the interlocking member and the latch bolt and coacting with said interlocking member to bias the latch bolt in the direction of its projection; spring means for retracting the latch bolt and being interconnected between said another end of said interlocking member and the working member; trigger means for releasably blocking movement of the interlocking member in such a manner that a certain repulsive force is accumulated in said spring means for retracting the latch bolt as the working member is retracted when the door is closed, and upon releasing of the interlocking member, effecting release of the spring means for retracting the latch bolt so as to move the latch bolt to its retracted position; and another spring means disposed between the working member and the casing and operable when the door is opened to return the latch bolt and the working member to the projected position.
Claim 3
Dependent Claim
76 words
A lock according to claim 1, further comprising a working piece extending from the side of said working member nearly in parallel with the latch bolt, and a bent piece having a tip portion bent so as to contact with the interlocking member; and compression coil springs between the tip of the working member and the side face of the interlocking member as well as between the bent piece and the side wall of the casing.
Claim 4
Dependent Claim
15 words
A lock according to claim 1, further comprising a push-button for actuating the trigger means.
Claim 5
Dependent Claim
41 words
A lock according to claim 1, further comprising a switch member; and an indicator such as a buzzer or a lamp or the like connected with the switch member and operative to provide an indication that the latch bolt is unlocked.
Claim 6
Dependent Claim
76 words
A lock according to claim 1, further comprising an inner casing; a pair of outer casings having nipping portions formed so as to extend a suitable amount from the inner casing and being provided oppositely to both outsides of the casing; and fastening means for detachably fastening at least one of the outer casings to the inner casing so as to nip the fixing portion of the door between both nipping portions of the outer casings.
Claim 7
Dependent Claim
87 words
A trigger means for a lock, comprising a casing; an interlocking member movable within the casing and provided with a projection at a suitable position thereon; a trigger main body pivotally mounted in the casing and having on one side thereof a shoulder portion detachably engaged with the projection of the interlocking member and having on another side thereof a projection having a slant face; and a working rod provided with a projection having a slant face engageable with the slant face of said trigger main body.
Claim 8
Dependent Claim
87 words
A trigger means for a lock, comprising a casing; an interlocking member movable within the casing and provided with a projection at a suitable position thereon; a trigger main body pivotally mounted in the casing and having on one side thereof a shoulder portion detachably engaged with the projection of the interlocking member and having on another side thereof a projection having a slant face; and a working rod provided with a projection having a slant face engageable with the slant face of said trigger main body.
Claim 9
Dependent Claim
177 words
A lock for latching a door comprising: a casing having a guide hole; a latch bolt and a working member concentrically and reciprocatably guided in the guide hole and movable between a projected position wherein said latch bolt projects from said casing for latching the door and a retracted position wherein said latch bolt is retracted into said casing and mutually formed telescopically; latch spring means disposed between the latch bolt and the casing to continuously bias the latch bolt towards its projected position; an interlocking member coacting with the latch bolt and inserted in a through groove extending to the guide hole of the casing; spring means for retracting the latch bolt; and trigger means for detachably blocking movement of the interlocking member so as to accumulate the repulsive force in the spring means for retracting the latch bolt as the working member is retracted, and for effecting release of the spring means for retracting the latch bolt so as to move the latch bolt to the retracted position by the detachment of the interlocking member.
Claim 10
Dependent Claim
177 words
A lock for latching a door comprising: a casing having a guide hole; a latch bolt and a working member concentrically and reciprocatably guided in the guide hole and movable between a projected position wherein said latch bolt projects from said casing for latching the door and a retracted position wherein said latch bolt is retracted into said casing and mutually formed telescopically; latch spring means disposed between the latch bolt and the casing to continuously bias the latch bolt towards its projected position; an interlocking member coacting with the latch bolt and inserted in a through groove extending to the guide hole of the casing; spring means for retracting the latch bolt; and trigger means for detachably blocking movement of the interlocking member so as to accumulate the repulsive force in the spring means for retracting the latch bolt as the working member is retracted, and for effecting release of the spring means for retracting the latch bolt so as to move the latch bolt to the retracted position by the detachment of the interlocking member.
Claim 11
Dependent Claim
153 words
A lock according to claim 7 comprising a guide pin, a driver pin connected at one end of the guide pin; spring means contacting with the driver pin and biasing the driver pin in the direction of the guide pin; a casing having holes therein which extend at nearly a right angle to and intersect with the guide hole, said holes being dimensioned such that one receives therein the guide pin, another receives therein the driver pin and the spring means, and a further intersects a through hole in said casing at nearly a right angle therewith; a working rod inserted in the through hole and provided with a curved recess at a portion thereof where the through hole intersects said further hole; and a ball interposed between the recess and another end of the guide pin and acts so as to press the guide pin by the action of the working rod.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |