Plug and pencil for engine

• US 20050025608A1
• Filed: 10/05/2004
• Published: 02/03/2005
• Est. Priority Date: 10/05/2004
• Status: Active Grant

• Current Assignee: Michael E. Fedor
• Original Assignee: Michael E. Fedor
• Inventors: Fedor, Michael E.
• Granted Patent: US 6,997,660 B2
• Time in Patent Office: Days
• US Class Current: 411/337
• CPC Class Codes: B63H 21/10 relating to condensers or engine-cooling fluid heat-exchangers
• CPC Class Codes: C23F 13/18 Means for supporting electrodes
• CPC Class Codes: C23F 2213/31 Immersed structures, e.g. submarine structures
• CPC Class Codes: F02F 2007/0041 Fixing Bolts
• CPC Class Codes: F16B 2033/025 with left-hand thread
• CPC Class Codes: Y10T 29/49826 Assembling or joining
• CPC Class Codes: Y10T 29/49996 Successive distinct removal operations
• CPC Class Codes: Y10T 29/49998 Work holding

Abstract

A first portion or plug and a second portion or pencil are provided, for use in a device, such as a marine engine. The first portion or plug may have an outer surface with external threads and a cavity with internal threads. The external threads of the first portion or plug may be threaded oppositely from the internal threads inside the cavity of the first portion or plug. The opposite threading allows the plug and pencil combination to be detached and unscrewed from an engine without the plug and pencil coming apart.

Claims

1. An apparatus comprising:

a first portion;

a second portion;

wherein the first portion has an outer surface having external threads and an inner cavity having internal threads, and wherein the external threads and internal threads are threaded in opposite directions.

and wherein the second portion has an end having external threads and wherein the external threads of the second portion can be screwed into the internal threads of the first portion to attach the second portion to the first portion.

2. The apparatus of claim 1 wherein

the first portion is a plug;

and

and the second portion is a pencil.

3. The apparatus of claim 2 wherein

the second portion is a zinc pencil.

4. The apparatus of claim 1 further comprising

a device having a cavity with internal threads,

and wherein the external threads of the first portion can be screwed into the internal threads of the device so that the first portion is attached to the device, and wherein while the external threads of the first portion are screwed into the internal threads of the device, at least part of the second portion lies inside of the cavity of the device.

5. The apparatus of claim 4 wherein

the first portion is a plug;

and

and the second portion is a pencil.

6. The apparatus of claim 5 wherein

the second portion is a zinc pencil.

7. The apparatus of claim 4 wherein

the device is part of an engine.

8. The apparatus of claim 7 wherein

the device is part of a marine engine.

9. A method comprising the steps of:

providing a first portion with an outer surface having external threads and an inner cavity having internal threads, and wherein the external threads and internal threads are threaded in opposite directions; and

providing a second portion having an end having external threads and wherein the external threads of the second portion can be screwed into the internal threads of the first portion to attach the second portion to the first portion.

10. The method of claim 9 wherein

the first portion is a plug;

and

and the second portion is a pencil.

11. The method of claim 10 wherein

the second portion is a zinc pencil.

12. The method of claim 9 further comprising

providing a device having a cavity with internal threads,

and wherein the external threads of the first portion can be screwed into the internal threads of the device so that the first portion is attached to the device, and wherein while the external threads of the first portion are screwed into the internal threads of the device, at least part of the second portion lies inside of the cavity of the device.

13. The method of claim 12 wherein

the first portion is a plug;

and

and the second portion is a pencil.

14. The method of claim 13 wherein

the second portion is a zinc pencil.

15. The method of claim 12 further comprising

providing the device as part of an engine.

16. The method of claim 15 further comprising

providing the device as part of a marine engine.