US 4,902,057 AGranted

Adjustable deadlatch

AssigneeHing Wai Metal Factory Ltd.

InventorHui P. Ching

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Abstract

An adjustable deadlatch for a lockset for adjusting to either of two backset positions. First and second cylindrical members are located in a telescopic arrangement for allowing a longitudinal telescopic adjustment between the cylindrical members. First longitudinal adjustment structure is interconnected between the cylindrical members and includes a first vertical slot and a first pin member located within the first vertical slot and includes a first rotatable member supporting the first pin member at a radial position. A deadbolt, located within the first cylindrical member includes a longitudinal opening. An actuating member includes a longitudinal portion located within the longitudinal opening. Second longitudinal adjusting structure is coupled between the deadbolt and the actuating member and includes a second vertical slot and a second pin member received within the second vertical slot and mounted on a second rotatable member at a radial position. The adjustment structures are interconnected so that rotation of either provides for rotation of the other for coordinating the longitudinal adjustment between the cylindrical members and between the deadbolt and the actuating member and thereby provides for an adjustment corresponding to the two backset positions.

Claims20

Dependent claims

An adjustable deadlatch for a lockset for adjusting to either of two backset positions for the lockset including,

a first cylindrical member having a first particular diameter,
a second cylindrical member having a second diameter larger than the first diameter and with the first and second cylindrical members located in a telescopic arrangement for allowing longitudinal telescopic adjustment between the cylindrical members,
first longitudinal adjustment means interconnected between the first and second cylindrical members and including a first vertical slot and a first pin member and with the first pin member located within the first vertical slot and further including a first rotatable member for supporting the first pin member in a radial position away from the axis of rotation of the first rotatable member so that rotation of the first rotatable member provides for a camming action of the first pin member within the first vertical slot to produce longitudinal telescopic adjustment between the cylindrical members,
a deadbolt located within the first cylindrical member and including a longitudinal opening in the deadbolt,
an actuating member including a longitudinal portion located within the longitudinal opening in the deadbolt,
second longitudinal adjusting means coupled between the deadbolt and the actuating member and including a second vertical slot and a second pin member received within the second vertical slot and with the second pin member mounted on a second rotatable member at a radial position away from the axis of rotation of the second rotatable member and with rotation of the second rotatable member providing for camming action between the second pin member and the second vertical slot to produce longitudinal movement between the actuating member and the deadbolt, and
means interconnecting the first adjustment means and the second adjustment means so that rotation of either of the adjustment means provides for rotation of the other of the adjustment means for coordinating the longitudinal adjustment between the cylindrical members and between the deadbolt and the actuating member and thereby providing for an adjustment corresponding to the two backset positions.

4 more elements

An adjustable deadlatch for a lockset for adjusting to either of two backset positions for the lockset including,

first and second cylindrical members located in a telescopic arrangement for allowing longitudinal telescopic adjustment between the cylindrical members,
one of the first and second cylindrical members including a first vertical slot and the other including a first pin member and with the first pin member located within the first vertical slot,
a first rotatable member supporting the first pin member in a radial position away from the axis of rotation of the first rotatable member so that rotation of the first rotatable member produces longitudinal telescopic adjustment between the cylindrical members,
a deadbolt located within the first cylindrical member and including a longitudinal opening in the deadbolt,
an actuating member including a longitudinal portion located within the longitudinal opening in the deadbolt,
one of the deadbolt and the actuating member including a second vertical slot and the other including a second pin member received within the second vertical slot,
a second rotatable member supporting the second pin member at a radial position away from the axis of rotation of the second rotatable member so that rotation of the second rotatable member produces longitudinal movement between the actuating member and the deadbolt, and
means interconnecting the first rotatable member and the second rotatable member for coordinating the longitudinal adjustment between the cylindrical members and between the deadbolt and the actuating members and between the deadbolt and the actuating member and thereby providing for an adjustment corresponding to the two backset positions.

5 more elements

Dependencies are inferred from the claim text.