Backset adjustment structure of dead bolt assembly for door lock

• US 6,318,769 B1
• Filed: 11/19/1999
• Issued: 11/20/2001
• Est. Priority Date: 03/11/1999
• Status: Expired due to Term

• Current Assignee: Hyundae DL, Inc.
• Original Assignee: Hyundae Metal Co., Ltd.
• Inventors: Kang, Eui Shik
• Primary Examiner(s): ESTREMSKY, GARY WAYNE
• Application Number:
  US09/443,143
• Time in Patent Office: 732 Days
• Field of Search: 292/1.5, 292/337, 292/DIG.60, 292/DIG.37
• US Class Current: 292/1.5
• CPC Class Codes: E05B 63/0017 Locks with sliding bolt without provision for latching
• CPC Class Codes: E05B 63/06 with lengthwise-adjustable bolts ; with adjustable backset, i.e. distance from door edge
• CPC Class Codes: Y10T 292/06 Adjustable backset
• CPC Class Codes: Y10T 292/62 Bolt casings

Abstract

A backset adjustment structure for a dead bolt assembly having a dead bolt connected with an operating plate, a support tube connected to support plates, and an operating lever operating the dead bolt, including cover plates enclosing the support plates and each having a hole for receiving the operating lever; a catch plate installed next to the operating plate to be moved along with the cover plates, and having catch grooves in which a given sized catch boss, provided to the operating plate, is fitted; the operating plate having a front end connected with the dead bolt by a pin and able to be turned down, and a space with a slant at its middle; and a button with a protruded slant formed on one of the cover plates, and operating to turn the operating plate down.

Claims

1. A deadbolt assembly having a backset adjustment structure, the dead bolt assembly comprising:

a dead bolt connected with an operating plate;

a support tube connected to support plates;

an operating lever operating the dead bolt;

cover plates enclosing the support plates each cover plate having a hole for receiving the operating lever;

a catch plate installed next to the operating plate to be moved along with the cover plates, said catch plate having catch grooves in which a catch boss with a predetermined size formed on the operating plate is fitted;

said operating plate having a front end connected with the dead bolt by a pin and able to be turned down, and a space with a slant at its middle; and

a button with a protruded slant inserted into one of the cover plates, and operating to turn the operating plate down.

2. The deadbolt assembly according to claim 1, wherein each of the support plates has concavities that correspond with the holes while the cover plates are moved forward and backward between backset positions a distance of 10 mm while two middle ones of said concavities are connected to each other, and one of the support plates has a guide groove leading the movement of the catch plate while another one of the support plates has a projection.

3. The deadbolt assembly according to claim 1, wherein the catch plate has a pair of catch grooves and an operating groove defined by four bent portions of its upper section, and a guide boss formed on its side surface to be fitted in a guide groove.

4. The deadbolt assembly according to claim 1, wherein the operating plate supports a plate spring with the front end.