Closure fasteners – Bolts – Sliding
Reexamination Certificate
1998-03-05
2001-10-09
Estremsky, Gary (Department: 3627)
Closure fasteners
Bolts
Sliding
C292S192000, C070S107000, C070S141000
Reexamination Certificate
active
06299222
ABSTRACT:
The present invention relates to an improved latchbolt, and in particular to a latchbolt which is suitable for remote operation, for example electronically.
Electrical and electronic locks comprising latch bolts and dead bolts are known, for use in commercial premises such as shops, hotels and offices. They have not so far been used, to any significant extent, in domestic premises because of the high cost of manufacture and the high cost and complexity of installation. Known electric and electronic locks have the disadvantage that they require a supply of mains electricity to the latch bolt, within the door in which it is installed, and this means that such locks have not so far been suitable for installation in domestic premises.
It is an advantage of electronic locks that they are adapted for operation by means of a remote control device, and this advantage is not currently available in locks which are suitable for general domestic installation.
It is an object of the present invention to provide a latchbolt, and a lock comprising a latchbolt, in which the above disadvantages are reduced or substantially obviated.
The present invention provides a latchbolt which comprises
(i) a latchbolt tail and
(ii) a latchbolt head, mounted on the latchbolt tail, and pivotable relative to the tail, characterised in that the latchbolt further comprises
(iii) stop means forming part of the latchbolt head;
(iv) blocking means, mounted on the latchbolt tail for movement relative to the latchbolt tail, between a first position in which the blocking means engages the stop means to prevent pivoting of the latchbolt head and a second position in which the stop means is not engaged and the latchbolt head is free to pivot relative to the latchbolt tail and
(v) biasing means biasing the blocking means towards the first position.
The present invention further provides a latchbolt assembly which comprises
(A) a latchbolt which comprises
(i) a latchbolt tail constrained to move between an obstruction position and a release position; and
(ii) a latchbolt head, mounted on the latchbolt tail, and pivotable relative to the tail;
(B) biasing means biasing the latchbolt towards the obstruction position and
(C) means operative to displace the latchbolt from the obstruction position towards the release position against the biasing means
characterised in that the latchbolt assembly further comprises
(iii) stop means forming part of the latchbolt head;
(iv) blocking means, mounted on the latchbolt tail for movement relative to the latchbolt tail, between a first position in which the blocking means engages the stop means to prevent pivoting of the latchbolt head and a second position in which the stop means is not engaged and the latchbolt head is free to pivot relative to the latchbolt tail and
(v) biasing means biasing the blocking means towards the first position.
In a preferred embodiment of a latchbolt assembly according to the invention the assembly further comprises means operative to displace the blocking means from the first position towards the second position against the biasing means. The means operative to displace the blocking means from the first position towards the second position against the biasing means preferably comprises a solenoid.
The latchbolt assembly according to the present invention is particularly suitable for incorporation in a lockset, which preferably also contains a deadbolt, which may be either mechanically or electrically operated.
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patent: 5085475 (1992-02-01), Austin
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patent: 2203794 (1988-10-01), None
Del Ponti John D.
Emhart Inc.
Estremsky Gary
Smith Spencer T.
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