Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Reexamination Certificate
1999-09-02
2001-06-12
Kramer, Dean J. (Department: 3652)
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
C187S205000, C187S208000, C187S219000, C187S269000
Reexamination Certificate
active
06244390
ABSTRACT:
DESCRIPTION
1. Field of Invention
This invention relates generally to a lift for a vehicle and particularly relates to an inground lift and more specifically relates to an inground lift with a receptacle for housing the lift mechanism which includes scissor arm assemblies.
2. Background Art
There have been a wide variety of lifts which have been heretofore manufactured and designed to raise and lower vehicles from the ground to permit working on said vehicles. Such lifts can include either two post or four posts or scissor lifts.
Generally speaking many of these lifts have been designed to be disposed above ground, that is such post and scissor mechanisms have been located above ground when they are in their collapsed position permitting a vehicle to be driven thereon as well as their extended lift position.
There have been a variety of attempts to include lifting mechanisms below or inground.
For example, U.S. Pat. No. 4,830,147 relates to a jacking device used for lifting a motor vehicle when repairing it and includes at least one jack installed in a floor pit and at least two horizontally spaced apart parallel pairs of links designed for simultaneous movement along two parallel vertical planes respectively.
Another arrangement is shown in U.S. Pat. No. 5,143,179 which relates to a lifting hoist for motor vehicles where the hoist includes a pit having a foundation, side walls and end walls; lifting cylinder means comprising at least one hollow lifting cylinder mounted in the pit and adapted to hold the motor vehicle carrying apparatus on the upper end thereof, the interior of the lifting cylinder being opened to pressurized fluid, the top end of the cylinder being sealed by a cover plate, and a high pressure unit for providing pressurized oil to the lifting means.
Yet another arrangement is shown in U.S. Pat. No. 2,733,777 which illustrates a lifting mechanism comprising a base having means whereby it may be mounted on the upper end of the moveable element of the lifting mechanism, tiltable load supporting members mounted on the base adjacent the respective ends thereof on substantially pivotal axis, each load supporting member having a part extending below the pivotal axis thereof, a connecting member mounted on the base for movement above a vertical axis below the ends thereof, elongated rigid members pivotally connected with the vertical axis and pivotally connected with the downwardly extending parts of the respective load supporting members.
Yet another arrangement is shown in U.S. Pat. No. 5,036,951 which relates to an elevator type storage structure for storing objects received at access level at a vertically spaced storage level.
Furthermore U.S. Pat. No. 5,450,928 shows a lift used for maintenance and repair of automobiles.
Finally an organization identified as “Rotary Lift” from Madison, Ind. manufactures inground lifts having a receptacle below ground sold under the trademark “ROTARY” as model number SL9.
Such prior art devices present relatively complicated structures. Moreover there is a need for a reliable inground scissor mechanism lift which is easier to construct and more reliable and stable.
DISCLOSURE OF INVENTION
It is an aspect of this invention to provide a lift for a vehicle comprising a displaceable support means moveable between a first inground position to a second above ground position for supporting said vehicle; scissor means associated with said displaceable support means for lifting said displaceable support means and said vehicle.
It is a further aspect of this invention to provide an inground lift for lifting a vehicle comprising support frame means adapted to be disposed in a pit; displaceable support means co-operating with said support frame means and moveable between a first inground position to a second support position so as to lift said vehicle; scissor means associated with said displaceable support means for moving said displaceable support means and said vehicle from said first position to said second support position.
It is a further aspect of this invention to provide an inground lift for lifting a vehicle comprising a pit in the ground; a receptacle disposed within said pit and having an upper end substantially level with said ground; an upper stationary support frame fixedly secured to said upper end of said receptacle, and presenting two spaced guide bushings; a lower support frame moveable within said receptacle; an upper and lower pair of scissor assemblies disposed between said stationary support frame and said moveable support frame; each of said upper pair of scissor assemblies comprising first and second arms pivotally connected generally between their ends; said first scissor arm having an upper end slideably secured to said stationary support frame; said second scissor arm having an upper end slideably secured to said stationary support frame; each of said lower pair of scissor arm assemblies comprising first and second scissor arms pivotally connected generally between their ends; said first scissor arm having a lower end slideably secured to said moveable support frame; said second scissor arm having a lower end slideably secured to said moveable support frame; said lower ends of said first and second arms of said upper pair of scissor assemblies pivotally connected to the upper arms of said first and second arms of said lower pair of scissor arm assemblies; a pair of support columns, each said support column having one end secured to said lower moveable support frame and an upper end slideably received by said guide bushings; a hydraulic cylinder having one end connected to one of said first and second scissor arms of said upper pair of scissor arm assemblies and the other end connected to one of said first and second scissor arms of said lower pair of scissor arm assemblies.
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Bruyns Michael
Rzhevsky Helon
Yeo Harold
Chin Paul T.
Gierczak Eugene J.A.
Kramer Dean J.
Wheeltronic Ltd.
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