Patent Grant
7243419
None.
This invention was not federally sponsored.
1. Field of the Invention
The invention generally relates to the field of hand-held mechanical devices. More particularly, the present invention involves a hand-held tool for removing a spark plug boot from a spark plug.
2. Description of the Related Art
Removing the boot from around a spark plug has been a concern for mechanics since the first spark was used to fire up a car engine. The boot must be removed carefully, as the spark plug and the threads with which it is inserted into the engine block are a delicate and essential part of the engine. Pulling on the spark plug wire itself may break an internal electrical connection, preventing the timing signal from ever reaching the spark plug in the future. At the same time, spark plugs are located fairly deep within the hood of a car, making them difficult to reach. In addition, sparks plugs in many vehicles are slanted at various angles, so even if a mechanic grasps the boot with his or her hand, there is a danger that in removing the boot the mechanic's hand will be injured as the hand smashes into the car body after the boot releases its hold on the spark plug.
Therefore, there is a present need for a hand-held device for quickly and efficiently removing a spark plug boot from a spark plug that is easy to use, helps to prevent damage to the spark plug, and minimizes the risk of injury to the user.
In this respect, before explaining at least one embodiment of the invention in detail it is to be understood that the invention is not limited in its application to the details of construction and to the arrangement of the components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced and carried out in various ways. In addition, it is to be understood that the phraseology and terminology employed herein are for the purpose of description and should not be regarded as limiting.
A primary object of this invention is to provide a quick and efficient tool for removing the boot from a spark plug attached to an engine.
It is a further object of this invention to accomplish the removal of the spark plug boot with minimum damage to the boot, spark plug, spark plug wire, and the hand of the user.
It is another object of this invention that a user be able to maneuver the flexible shaft of the invention to avoid engine obstacles.
It is a still another object of this invention to provide a unique hand-held spark plug boot removal device to the field of hand-held mechanical devices.
These objects and further objects and features of the invention will be apparent to one skilled in the art from the disclosure of the present invention as set forth herein.
The present invention involves a spark plug boot removal tool having a handle portion, an extension portion, and a grasping portion. The handle portion includes a spring-loaded trigger. The grasping portion includes a fixed grasping member and a rotatable grasping member. The extension portion includes an elongated flexible shaft enclosing a control rod that is attached to a triangular block. When the grasping portion is positioned over a spark plug boot, the trigger is compressed, causing the control rod to pull the block, causing the rotatable grasping member to join with the fixed grasping member to clamp around the spark plug boot. Both grasping members have an angular bend that allows the user to position the elongated flexible shaft outside of the engine compartment when exerting a force on the handle portion to remove the spark plug boot, thus minimizing the risk of injury.
There has thus been outlined, rather broadly, the more important features of the invention in order that the detailed description thereof may be better understood, and in order that the present contribution to the art may be better appreciated. There are additional features of the invention that will be described hereinafter and which will form the subject matter of the claims appended hereto.
The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principals of this invention.
Referring now to the drawings,
Grasping portion 50 includes a fixed grasping member 60 and a rotatable grasping member 70. Fixed grasping member 60 is attached to a grasping body 80 at attachment points 82, while rotatable grasping member 70 is attached to grasping body 80 at attachment point 84. Attachment point 84 serves as a pivot point for rotatable grasping member 70. The unattached portion of fixed grasping member 60 contains a bend 62. Similarly, the unattached portion of rotatable grasping member 70 contains a bend 72. Bend 62 and bend 72 offset the respective portions of fixed grasping member 60 and rotatable grasping member 70 that are contained within grasping body 80, approximately 20 degrees from fixed grasping member end 64 and rotatable grasping member end 74. End 64 and end 74 are curved surfaces intended to, when pushed toward each other, form a circle of a diameter slightly smaller than the boot which covers a spark plug (not shown).
Fixed grasping member 60 also contains an indentation 66 located on one side 68 of the portion contained within grasping body 80. Similarly, rotatable grasping member 70 also contains an indentation 76 located on one side 78 of the portion contained within grasping body 80. Indentation 66 and indentation 76 are angular depressions that, when both contacted by a triangular pull block 90, cause the portion of rotatable grasping member 70 contained within grasping body 80 to move outwardly from fixed grasping member 60 (shown by arrow 85), to cause rotatable grasping member end 74 to move inwardly toward fixed grasping member 60 (shown by arrow 86). When pull block 90 is not being pulled back by a user compressing trigger 24, a return spring 98 returns pull block 90 to its normal position, in which rotatable grasping member 70 is in the “open” position.
Extension portion 40 is comprised of a flexible shaft 42. Shaft 42 contains an outer body 44. Shaft 42 allows a mechanic to maneuver spark plug boot removal tool 10 around obstacles in a vehicle engine and still be able to effectively remove the boot from a spark plug. Outer body 44 encloses a control rod 46. Control rod 46 is preferably a piece of metal that begins in pull block 90 and can be secured within pull block 90 by untwisting its wires (not shown) and allowing the wires to cool in pull block 90 as pull block 90 is cooling after having been poured into a mold. Alternatively, if pull block 90 is comprised of two pieces that are hammered or pressed together, the wires can be positioned between the pieces before the hammering or pressing for secure attachment. Control rod 46 extends from pull block 90 into handle portion 20, passing over a control rod guide 38, terminating at trigger 24. Control rod guide 38 rotates freely within handle portion 20, ensuring that control rod 46 can move freely. Thus, when a user pulls back on trigger 24, trigger 24 rotates about trigger pivot 25 in a clockwise direction (shown by arrow 18) and exerts a pull on control rod 46 in a direction shown by arrow 19, causing rotatable grasping member 70 to move inward toward fixed grasping member 60.
Because of the angular positioning of fixed grasping member 60 and rotatable grasping member 70, a user can pull the invention upward in a purely vertical manner and still remove the boot. This allows the user to exert the force from an area outside of the engine compartment, where there is no risk of injuring a user's hand against the engine or car. Previous devices require a user to pull in the opposite direction to which the spark plug is attached to the engine, which often requires still pulling within the engine and hood region, thereby increasing the chance that when the boot disengages from the spark plug the user's hand will smash into other engine components or the car body itself.
With respect to the above description it is to be realized that the optimum dimensional relationships for the parts of the invention, including variations in size, materials, shape, form, function and manner of operation, assembly, and use, are deemed readily apparent and obvious to one skilled in the art, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed by the present invention. Therefore, the foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described. Accordingly, all suitable modifications and equivalents fall within the scope of the present invention.
The above description, together with the objects of the invention and the various features of novelty which characterize the invention, are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and the specific advantages attained by its uses, reference should be made to the accompanying drawings and descriptive matter in which there are illustrated preferred embodiments of the invention.
Further, the purpose of the foregoing abstract is to enable the U.S. Patent and Trademark Office and the public generally, and especially the scientists, engineers, and practitioners in the art who are not familiar with patent or legal terms or phraseology, to determine quickly from a cursory inspection the nature and essence of the technical disclosure of the application. The abstract is neither intended to define the invention of the application, which is measured by the claims, nor is it intended to be limiting, as to the scope of the invention in any way.
This application claims the benefit of U.S. Provisional Patent Application Ser. No. 60/665,225 filed on Mar. 28, 2005.
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| Number | Date | Country | |
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| Number | Date | Country | |
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| 60665225 | Mar 2005 | US |
