Closure fasteners – Trippers
Reexamination Certificate
2000-05-08
2001-10-16
Luu, Teri Pham (Department: 3627)
Closure fasteners
Trippers
C292S034000, C292S165000, C070S107000, C070S109000, C070S110000, C070S15100R
Reexamination Certificate
active
06302456
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a latch-and-bolt block in which the actuation of the bolt into the closure position occurs simultaneously with the closure actuation of the latch.
In latch-and-bolt locks, actuation of the bolt into the closure position can occur only after the latch has already engaged the corresponding selvage, particularly after closing a door from the outside. When a door provided with a latch-and-bolt lock is closed from the outside, the door is first of all set ajar until the latch snaps into the position for engaging the corresponding selvage and then the bolt is actuated into the closure position by means of the key.
However, it can be convenient to have the bolt move into the closure position automatically, i.e., without having to use the key, when the door is closed from outside. The key would be used only to open the door from outside.
SUMMARY OF THE INVENTION
The aim of the present invention is to provide a lock which allows to actuate the bolt into the closure position simultaneously with the engagement of the latch in the corresponding selvage.
Within the scope of this aim, an object of the present invention is to provide a lock in which actuation of the bolt simultaneously with the latch occurs both when closing the door and when opening it.
Another object of the present invention is to provide a lock which is capable of achieving the above aim and object with a structure which is constructively simple and therefore economical and highly reliable in operation.
This aim and these objects are achieved with a lock of the latch-and-bolt type, as defined in claim
1
.
REFERENCES:
patent: 3769822 (1973-11-01), Yolkowski
patent: 4118056 (1978-10-01), Alexander
patent: 4890870 (1990-01-01), Miron
patent: 5083448 (1992-01-01), Kärkkäinen et al.
patent: 5263749 (1993-11-01), Errani
patent: 5782114 (1998-07-01), Zeus et al.
patent: 5813255 (1998-09-01), Tell, III et al.
patent: A1-19514742 (1996-10-01), None
patent: A1- 0682167 (1995-11-01), None
patent: 115927 (1946-02-01), None
Costruzioni Italiane Serrature Affini C.I.S.A. S.p.A.
Josif Albert
Luu Teri Pham
Modiano Guido
O'Byrne Daniel
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