Sleeve for dead bolt

• US 5,316,353 A
• Filed: 10/24/1991
• Issued: 05/31/1994
• Est. Priority Date: 07/11/1988
• Status: Expired due to Fees

• Current Assignee: John L. Mckernan
• Original Assignee: John L. Mckernan
• Inventors: McKernan, John L.
• Primary Examiner(s): Gall, Lloyd A.
• Application Number:
  US07/782,974
• Time in Patent Office: 950 Days
• Field of Search: 70/416-418, 70/448, 70/451, 292/142, 292/337
• US Class Current: 292/337
• CPC Class Codes: E05B 15/1614 of hard materials, to prevent drilling E05B67/04, E05B67/38 take precedence
• CPC Class Codes: E05B 55/005 Cylindrical or tubular locks
• CPC Class Codes: E05B 63/0017 Locks with sliding bolt without provision for latching
• CPC Class Codes: Y10T 292/62 Bolt casings
• CPC Class Codes: Y10T 70/7915 Tampering prevention or attack defeating
• CPC Class Codes: Y10T 70/7921 Armoring
• CPC Class Codes: Y10T 70/8459 Housings

Abstract

A structure is provided to prevent access to the latch pin of a dead bolt or latch lock. For dead bolts, a sleeve is provided which is received over the bolt frame in which the latch pin reciprocates. The sleeve is secured to the frame in such a manner that the latch pin cannot be accessed without removing the sleeve. For latch locks, a sleeve is provided with an extending tongue, which tongue covers the ears of the latch pin and denies access to the ears.

Claims

1. A sleeve having a tongue extending from one end thereof, the sleeve being tubular, the sleeve configured to enclose a barrel of a latch lock, the lock including ears, the tongue spaced apart from and configured to shield the ears of the latch to thereby deny access to the ears from a location exterior of the lock.

2. The sleeve of claim 1 wherein the tongue lies in substantially the same plane as the sleeve wall from which is extends.

3. A protective sleeve adapted to be secured within a dead bolt assembly, the assembly having a bolt frame a bolt actuating hub and a latch pin, the sleeve spaced apart from and extending over the latch pin, which sleeve comprises:

an upper wall having upper and lower smooth surfaces, the upper wall having a pair of outer edges;

a side wall having inner and outer planar surfaces free of recesses, the side wall having upper and lower edges, the upper edge of the side wall joined to one of the outer edges of the upper wall, the upper wall spaced apart from the latch pin a sufficient distance to allow the latch pin to reciprocate, the upper wall in combination with the side wall dimensioned to be received over the bolt frame of the dead bolt assembly and the latch pin, the side wall including means to secure the sleeve within the bolt assembly.

4. The sleeve of claim 3 wherein the means to secure the sleeve within the dead bolt assembly comprises a first aperture formed in the side wall through which a fastener passes to secure the sleeve therein.

5. The sleeve of claim 4 which includes:

second apertures which are in register with the bolt actuating hub.

6. The sleeve of claim 5 wherein the second apertures are of a diameter larger than the diameter of the bolt actuating hub.

7. The sleeve of claim 4 wherein the side wall is a first side wall and wherein the sleeve comprises a second side wall spaced apart from and in parallel relationship with the first side wall, said second side wall having inner and outer planar surfaces.

8. The sleeve of claim 7 wherein the walls include first paired apertures which are in register for the passage of threaded fasteners therethrough and the walls comprise paired second apertures which are in register with the bolt actuating hub.

9. The sleeve of claim 7 wherein the side walls each have a leading edge and recesses are formed in the leading edges of said side walls.

10. The sleeve of claim 7 wherein the side walls are substantially rectangular in shape.

11. The sleeve of claim 7 which includes:

a bottom wall joined to at least one of said side walls.