Adjustable deadlatch

• US 4,759,576 A
• Filed: 07/11/1986
• Issued: 07/26/1988
• Est. Priority Date: 07/11/1986
• Status: Expired due to Fees

• Current Assignee: Kambo Security Products Limited
• Original Assignee: Kambo Security Products Limited
• Inventors: Ching, Hui P.
• Primary Examiner(s): Gall, Lloyd A.
• Application Number:
  US06/884,712
• Time in Patent Office: 746 Days
• Field of Search: 292/337, 292/DIG. 60, 292/1, 292/169, 292/DIG. 44, 292/169.23, 70/134, 70/143, 70/461, 70/422, 70/448
• US Class Current: 292/1.5
• CPC Class Codes: E05B 63/06 with lengthwise-adjustable bolts ; with adjustable backset, i.e. distance from door edge
• CPC Class Codes: Y10S 292/60 Adjustment provisions
• CPC Class Codes: Y10T 292/06 Adjustable backset
• CPC Class Codes: Y10T 292/62 Bolt casings

Abstract

An adjustable deadlatch for a lockset for adjusting to either of two backset positions, including a first cylindrical member having a first particular diameter. A second cylindrical member has a second diameter larger than the first diameter and with the first and second cylindrical members located in a telescopic arrangement. A detent is formed between the first and second cylindrical members and has two longitudinal locking detent positions corresponding to the two backset positions. A deadbolt is located within the first cylindrical member and includes a longitudinal opening. A longitudinal portion of an actuating member is located within the longitudinal opening in the deadbolt. The longitudinal portion includes a longitudinal slot having a length corresponding to the distance between the two backset positions. A pin member passes through the deadbolt and has an inner end located in and guided by the slot. A telescopic adjustment of the cylindrical members between the two detent positions provides for an adjustment of the pin in the slot and thereby an adjustment of the deadlatch corresponding to the two backset positions.

Claims

1. An adjustable deadlatch for a lockset for adjusting to either of two backset positions for a 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 providing a telescopic adjustment between the cylindrical members,

detent means interconnected between the first and second cylindrical members and having two longitudinal detent positions corresponding to the two backset positions for locking the cylindrical members together in two detent positions,

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,

the longitudinal portion of the actuating member including a longitudinal slot having a length corresponding to the distance between the two backset positions and additionally including a pin member passing through the deadbolt and with an inner end of the pin member located in and guided by the slot, and

the telescopic adjustment of the cylindrical members between the two detent positions providing for an adjustment of the pin in the slot corresponding to the two backset positions.

2. The adjustable deadlatch of claim 1 wherein,

the detent means is formed by a raised area on one of the two cylindrical members and a pair of opening in the other cylindrical member forming the two detent positions to have either of the openings receive the raised area to lock the cylindrical members in the two detent positions.

3. The adjustable deadlatch of claim 2,

additionally including the raised area formed in a flap portion of the one cylindrical member and with the flap portion forming a spring member to urge the raised area against the other cylindrical member and into either of the two openings.

4. The adjustable deadlatch of claim 3 wherein,

the raised area is formed with at least one cut side to provide a stop against relative movement between the cylindrical members in at leasat one direction when the raised area is received within either of the two openings and with the size of the raised area opposite the cut side curved outwardly to form a ramping surface to allow the raised area to be released from either of the two openings upon relative movement between the cylindrical members in at least the direction opposite to the one direction.

5. The adjustable deadlatch of claim 4 wherein,

the directions of movement to release and lock the raised area from and within either opening is a rotary movement and with the telescopic adjsutment provided by a longitudinal movement between the cylindrical members perpendicular to the rotary movement.

6. The adjustable deadlatch of claim 5 wherein,

the longitudinal slot has upturned end portions to form a U-shaped slot to guide the rotational and longitudinal movement of the cylindrical members and to prevent longitudinal movement between the deadbolt and the actuating member when the pin is located within either of the upturned end portions of the U-shaped slot.

7. The adjustable deadlatch of claim 1 wherein,

the longitudinal opening in the deadbolt is round and along a central axis and forms an inside round surface and the longitudinal poriton of the actuating member is round and has an outside round surface and the slot in the longitudinal portion is formed along the outside round surface.

8. The adjustable deadlatch of claim 7 wherein,

the slot has upturned end portions to form a U-shaped slot to prevent longitudinal movement between the deadbolt and the actuating member when the pin is located within either of the upturned end portions of the U-shaped slot.

9. The adjustable deasdlatch of claim 8 wherein,

the detent means is spring biased.

10. The adjustable deasdlatch of claim 9 wherein,

the spring biased detent means is unlocked only by relative movement between the cylindrical members in the direction to move the pin down the upturned end portions of the U-shaped slot.

11. The adjustable deadlatch of claim 1 wherein,

the deadbolt is contained within the first cylindrical member, the first cylinddrical member is contained within the second cylindrical member and at least the longitudinal portion of the actuating member is contained within the deadbolt and thereby contained within the first and second cylindrical members.

12. An adjustable deadlatch for adjusting to either of two backset positions, including

14. The adjustable deadlatch of claim 12 wherein,

the directions of movement to release and lock the raised area from and within either opening is a rotary movement and with the telescopic adjustment provided by a longitudinal movement between the cylindrical members perpendicular to the rotary movement.

16. The adjustable deadlatch of claim 14 wherein,

the spring biased detent means is unlocked only by relative movement between the cylindrical members in the direction to move the pin down the upturned end portions of the U-shaped slot.

13. 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 providing a telescopic adjustment between the cylindrical members,

detent means interconnected between the first and second cylindrical members and having two longitudinal detent positions corresponding to the two backset positions for locking the cylindrical members together in two detent positions,

a deadbolt located within the first cylindrical member,

an actuating member adjustably coupled to the deadbolt for actuating the deadbolt between open and closed positions,

the telescopic adjustment of the cylindrical members between the two detent positions providing for an adjustment of the coupling between the actuating member and the deadbolt corresponding to the two backset positions,

the detent means formed by a raised area on one of the two cylindrical members and a pair of openings in the other cylndrical member to form the two detent positions to have either of the openings receive the raised area to lock the cylindrical members in the two detent positions,

the raised area formed in a flap portion of the one cylindrical member and with the flap portion forming a spring member to urge the raised area against the other cylindrical member and into either of the two openings, and

the raised area formed with at least one cut side to provide a stop against relative movement between the cylindrical members in at least one direction when the raised area is received within either of the two openings and with the side of the raised area opposite the cut side curved outwardly to form a ramping surface to allow the raised area to be released from either of the two openings upon relative movement between the cylindrical members in at least the direction opposite to the one direction.

15. The adjustable deadlatch of claim 13 wherein,

the adjustable coupling between the deadbolt and actuating member includes a pin within a longitudinal slot and the longitudinal slot having upturned end portions to form a U-shaped slot to guide the rotational and longitudinal movement of the cylindrical members and to prevent longitudinal movement between the deadbolt and the actuating member when the pin is located within either of the upturned end portions of the U-shaped slot.