Metal working – Means to assemble or disassemble – With work-holder for assembly
Reexamination Certificate
2000-03-23
2001-08-14
Watson, Robert C. (Department: 3723)
Metal working
Means to assemble or disassemble
With work-holder for assembly
C029S283000
Reexamination Certificate
active
06272724
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a new and improved blade removing tool for rotary lawn mowers and, more particularly, pertains to facilitating the safe and convenient removal of a bolt holding the rotary blade to the motor of a lawn mower.
2. Description of the Prior Art
The use of lawn mover tools of known designs and configurations is known in the prior art. More specifically, lawn mover tools of known designs and configurations heretofore devised and utilized for the purpose of changing lawn mower blades through known methods and apparatuses are known to consist basically of familiar, expected, and obvious structural configurations, notwithstanding the myriad of designs encompassed by the crowded prior art which has been developed for the fulfillment of countless objectives and requirements.
The prior art discloses a large number of Lawn mower tools of known designs and configurations. By way of example, U.S. Pat. No. 4,564,991 to Harold E. Taylor discloses a tool for holding a blade for installation and removal thereof. U.S. Pat. No. 4,736,544 to Lawrence Greenquist discloses a blade holder for sharpening lawnmower blades. U.S. Pat. No. 4,956,905 to Leonard D. Davidson discloses a tool for holding a rotatable lawn mower blade. Lastly, U.S. Pat. No. 5,865,018 to Todd R. Wanie discloses a cutter blade removal tool.
In this respect, the blade removing tool for rotary lawn mowers according to the present invention substantially departs from the conventional concepts and designs of the prior art, and in doing so provides an apparatus primarily developed for the purpose of facilitating the safe and convenient removal of a bolt holding the rotary blade to the motor of a lawn mower.
Therefore, it can be appreciated that there exists a continuing need for a new and improved blade removing tool for rotary lawn mowers which can be used to facilitate the safe and convenient removal of a bolt holding the rotary blade to the motor of a lawn mower. In this regard, the present invention substantially fulfills this need.
SUMMARY OF THE INVENTION
In view of the foregoing disadvantages inherent in the known types of lawn mower tools of known designs and configurations now present in the prior art, the present invention provides a new and improved blade removing tool for rotary lawn mowers. As such, the general purpose of the present invention, which will be described subsequently in greater detail, is to provide a new and improved blade removing tool for rotary lawn mowers and method which have all the advantages of the prior art and none of the disadvantages.
To attain this, the present invention essentially comprises a lawn mower blade remover. First provided is a bolt. The bolt holds the rotary blade to the motor of a lawn mower. Next provided is a central support assembly. The central support assembly has a short horizontal upper plate and a a long horizontal lower plate. The central support assembly also has a horizontal intermediate plate located between the upper and lower plates. A circular aperture is formed in each of the plates in axial alignment to form a vertical guide through the plates. The assembly has tapering sides plates coupling the horizontal plates together to hold the support assembly in a rigid trapezoidal orientation. The support assembly and apertures form a guide and are adapted to be positioned over a bolt holding a rotary lawn mower blade in position and to allow the passage of a socket wrench through the apertures for loosening and/or tightening a bolt axially aligned beneath the aperture of the lower plate. An elongated handle is next provided. The elongated handle has an interior end extending through one of the side plates. The elongated handle also has an exterior end adapted to held by a user. The handle functions to retain the support assembly against rotation during operation and use. A pair of projections, each in an inverted T-shaped configuration, extend downwardly from the lower plate parallel with the handle. The projections are adapted to be positioned on opposite sides of a blade during operation and use to contact the blade when a socket wrench tends to turn a bolt and the blade with resistance being provided by the user through the handle. An optional adapter is provided. The adapter is formed of an elongated plate. The adapter has an upper surface in contact with the lower surface of the lower plate. A central aperture is provided in the adapter adjacent to the aperture of the lower plate. The adapter has downwardly extending end sections adapted to contact the lawn mower blade during the loosening and/or tightening of the bolt. The end sections extend away from the lower plate a greater distance than the pair of projections. Small apertures are provided in the optional adapter and lower plate. The small adapters are in mutual alignment. Associated bolts are provided. The bolts extend through the small apertures. Associated nuts are coupled to the bolts to hold the supplemental plate in position.
There has thus been outlined, rather broadly, the more important features of the invention in order that the detailed description thereof that follows may be better understood and in order that the present contribution to the art may be better appreciated. There are, of course, additional features of the invention that will be described hereinafter and which will form the subject matter of the claims appended hereto.
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 arrangements 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. Also, 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.
As such, those skilled in the art will appreciate that the conception upon which this disclosure is based may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention.
It is therefore an object of the present invention to provide a new and improved blade removing tool for rotary lawn mowers which has all the advantages of the prior art lawn mower tools of known designs and configurations and none of the disadvantages.
It is another object of the present invention to provide a new and improved blade removing tool for rotary lawn mowers which may be easily and efficiently manufactured and marketed.
It is a further object of the present invention to provide a new and improved blade removing tool for rotary lawn mowers which is of a durable and reliable construction.
An even further object of the present invention is to provide a new and improved blade removing tool for rotary lawn mowers which is susceptible of a low cost of manufacture with regard to both materials and labor, and which accordingly is then susceptible of low prices of sale to the consuming public, thereby making such a blade removing tool for rotary lawn mowers economically available to the buying public.
Even still another object of the present invention is to facilitate the safe and convenient removal of a bolt holding the rotary blade to the motor of a lawn mower.
Lastly, it is an object of the present invention to provide a new and improved blade removing tool for rotary lawn mowers including a central support assembly. The support assembly has guides adapted to be positioned over a bolt holding a rotary lawn mower blade in position and to allow the passage of a socket wrench there through. An elongated handle has an interior end coupled to the support assembly. It also has an exterior end a
Holstein Laurence E.
Sterling Kevin R.
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