Implements or apparatus for applying pushing or pulling force – Hoisting truck – Single throw lever
Reexamination Certificate
1999-09-16
2001-01-09
Watson, Robert C. (Department: 3723)
Implements or apparatus for applying pushing or pulling force
Hoisting truck
Single throw lever
Reexamination Certificate
active
06170802
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a convertible lifting device and more particularly pertains to enabling heavy objects to be picked up and moved from one place to another.
Those who work on automobiles sometimes find it necessary to remove the engine from the vehicle. Unfortunately, these engines are extremely heavy and generally require some type of machinery in order to accomplish this task. The machinery used is often complicated and difficult to use and tends take up a significant amount of space. These machines sometimes require more than one person to successfully negotiate the removal of the engine. What is needed is a device that will allow one person to remove an engine from a vehicle and transport the engine to another location if needed. The device could also easily be used to pick up other heavy objects.
The present invention attempts to solve the abovementioned problem by providing a device that is portable and convertible, and can be simply operated by a single person in order to facilitate the removal of an engine from a vehicle or, in the alternative, move some other heavy object.
The use of lifting devices are known in the prior art. More specifically, lifting devices heretofore devised and utilized for the purpose of lifting heavy items are known to consist basically of familiar, expected and obvious structural configurations, notwithstanding the myriad of designs encompassed by the crowded prior art which have been developed for the fulfillment of countless objectives and requirements.
By way of example, U.S. Pat. No. 5,725,112 to Thorby discloses a portable crane for use in conjunction with a motor vehicle comprised of a lifting arm, hook, and telescopic brace. U.S. Pat. No. 5,402,898 to Lute discloses a crane assembly with a turnable attachment for use with a vehicle. U.S. Pat. No. 5,211,297 to Vandervalk discloses a mobile, folding crane. U.S. Pat. No. 4,483,448 to Wittman discloses a heavy duty crane.
While these devices fulfill their respective, particular objective and requirements, the aforementioned patents do not describe a convertible lifting device for enabling heavy objects to be picked up and moved from one place to another.
In this respect, the convertible lifting device 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 enabling heavy objects to be picked up and moved from one place to another.
Therefore, it can be appreciated that there exists a continuing need for a new and improved convertible lifting device which can be used for enabling heavy objects to be picked up and moved from one place to another. In this regard, the present invention substantially fulfills this need.
SUMMARY OF THE INVENTION
In the view of the foregoing disadvantages inherent in the known types of lifting devices now present in the prior art, the present invention provides an improved convertible lifting device. As such, the general purpose of the present invention, which will be described subsequently in greater detail, is to provide a new and improved convertible lifting device and method which has all the advantages of the prior art and none of the disadvantages.
To attain this, the present invention essentially comprises a base comprised of a pair of elongated bars with wheels on opposing ends thereof. A pair of cross plates extend between the elongated bars adjacent one end of the base. The pair of cross plates have a receiving collar secured thereto. The collar has an open forward end directed forwardly with respect to the base. The collar has an aperture through a side wall thereof for removably receiving a locking pin therein. A vertical stanchion is coupled with respect to the base. The vertical stanchion includes a lower portion and an upper portion. The lower portion has an L-shaped support secured to a lower end thereof. The L-shaped support has a horizontal portion dimensioned for being received within the open forward end of the receiving collar of the base. The horizontal portion has an aperture therethrough for aligning with the aperture in the receiving collar for receiving a locking pin therethrough. An open upper end of the lower portion telescopically receives the upper portion therein. The lower portion has a gear disposed therein for engaging threads formed on the upper portion. The gear is connected with a crank whereby rotation of the crank will rotate the gear so as to selectively raise and lower the upper portion with respect to the lower portion. A horizontal stanchion is pivotally coupled with respect to the vertical stanchion. The horizontal stanchion includes an inner portion and an outer portion. The inner portion is pivotally coupled with an upper end of the upper portion of the vertical stanchion. The inner portion has an open outer end for slidably receiving the outer portion therein. The inner portion and the outer portion have a plurality of apertures therethrough for selectively aligning for receiving a locking pin therethrough so as to fix the outer portion with respect to the inner portion. An outer end of the outer portion has a hook coupled thereto. A hydraulic ram is coupled between the vertical stanchion and the horizontal stanchion. The ram has a lower end pivotally secured to the upper portion of the vertical stanchion. An upper end of the ram is couplable to one of a plurality of tabs secured to the inner portion of the horizontal stanchion. A hydraulic pump is coupled with the vertical stanchion in communication with the hydraulic ram. The pump has a handle coupled thereto to facilitate raising and lowering of the hydraulic ram.
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 convertible lifting device which has all the advantages of the prior art lifting devices and none of the disadvantages.
It is another object of the present invention to provide a new and improved convertible lifting device which may be easily and efficiently manufactured and marketed.
It is a further object of the present invention to provide a new and improved convertible lifting device which is of durable and reliable construction.
An even further object of the present invention is to provide a new and improved convertible lifting device 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 convertible lifting device economically available to the buying public.
Even still another object of th
Goldstein & Canino
Watson Robert C.
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