Method and apparatus for transporting work objects

• US 5,120,184 A
• Filed: 04/26/1990
• Issued: 06/09/1992
• Est. Priority Date: 04/26/1990
• Status: Expired due to Term

• Current Assignee: Gerawan Farming, LLC
• Original Assignee: Daniel J. Gerawan
• Inventors: Gerawan, Daniel J.
• Primary Examiner(s): Bucci, David A.
• Application Number:
  US07/514,935
• Time in Patent Office: 775 Days
• Field of Search: 414/495, 414/786, 254/93 HP, 187/8.71, 187/8.72, 187/17, 187/18, 410/87, 410/88, 410/119, 410/125, 198/955
• US Class Current: 414/495
• CPC Class Codes: B60P 1/02 with parallel up-and-down movement of load supporting or containing element in combination with tipping B60P1/34; devices for lifting or lowering bulky or heavy goods for loading or unloading purposes, movable on wheels or the like, e.g. fork-lift trucks, B66F9/06 ; suspensions with electronic levelling control during loading or unloading B60G17/0157
• CPC Class Codes: B60P 7/16 Protecting against shocks B60P7/065 takes precedence
• CPC Class Codes: B61D 45/008 Shock absorbing devices

Abstract

A method and apparatus for transporting a work object including a frame adapted to be mounted on a vehicle having a supporting surface, a platform for receiving the work object in rested relation thereon disposed in overlaying relation to the supporting surface of the vehicle, an inflatable reservoir disposed between the supporting surface and the platform, and a system for selectively inflating the reservoir to move the platform and thus the work object borne thereby to a suspended position cushioned against damage during transport by the vehicle.

Claims

1. An apparatus for transporting a work object comprising a frame adapted to be mounted on a means of conveyance having a supporting surface, a platform for receiving sad work object in rested relation thereon disposed in overlaying relation to said supporting surface of the means of conveyance, an inflatable reservoir disposed between said supporting surface and the platform, at least two spaced corresponding portions of said platform and frame individually linked by guide plates individually extending substantially vertically between the platform and the frame to define a path of movement for said platform toward and from the frame, rotational guide assemblies individually engageable with said guide plates for guiding movement of the platform in said path, and means for selectivity inflating said reservoir to move the platform and thus the work object borne thereby from the frame to a suspended position cushioned against damage during transport by said means of conveyance.

2. The apparatus of claim 1 wherein said means of conveyance is a vehicle, the supporting surface is a substantially horizontal bed of said vehicle and said frame is adapted to be mounted on said bed with the platform disposed thereabove.

3. The apparatus of claim 2 wherein said platform and frame are so interconnected by the guide plates and guide assemblies to define a range of movement of the platform toward and from the frame.

4. The apparatus of claim 2 wherein said platform and frame are so interconnected that the platform is movable from a first position, wherein the platform and bed of the vehicle are spaced from each other to define a chamber therebetween, to a second position, wherein the platform is spaced farther above said bed of the vehicle substantially insulated from motion potentially damaging to said work object.

5. The apparatus of claim 4 wherein said reservoir is an air bag disposed in said chamber between the platform and the bed of the vehicle and is inflatable by the inflating means to move the platform between the first and second positions.

6. The apparatus of claim 5 wherein said platform and frame are interconnected by the guide plates and guide assemblies so as to limit movement of the platform to a range of vertical movement limited to the coextensive with said first and second positions and to a range of horizontal movement permitting sufficient play in movement of the platform between the first and second positions to absorb motion potentially damaging to said work object.

7. An apparatus for transporting a work object comprising a frame of a rectangular configuration having four corners adapted to be mounted on a substantially horizontal bed of a vehicle;

a platform of a rectangular configuration substantially conforming to said rectangular configuration of the frame and having four corners individually substantially overlaying the four corners of the frame for receiving said work object in rested relation thereon disposed in overlaying relation to said bed of the vehicle, said platform being movable from a first position, wherein the platform and bed of the vehicle are spaced from each other to define a chamber therebetween, to a second position, wherein the platform is spaced farther above the bed of the vehicle than in said first position;

an air bag disposed in the chamber between the platform and the bed of the vehicle;

means for selectively inflating the air bag to move the platform, and thus the work object borne thereby, between the first and second positions cushioned against damage during transport by said vehicle in said second position; and

at least two corresponding corners of the frame and platform individually linked by guide plates individually extending substantially vertically between the platform and frame to define a path of movement of said platform between said first and second positions and rollers individually engageable with said guide plates to guide movement therealong.

8. The apparatus of claim 7 wherein each of said guide plates is substantially right angular in cross section to provide a pair of guide surfaces and rollers are individually engageable with said guide surfaces of each guide plate to limit lateral movement of the platform in said path of movement between said first and second positions.

9. The apparatus of claim 8 wherein a stop is mounted on each guide surface of each guide plate extending beneath the respective roller thereof for engagement therewith substantially upon said platform reaching the second position to terminate movement beyond said second position.

10. The apparatus of claim 9 wherein each guide plate has a terminal end disposed for rested engagement with the frame substantially upon the platform reaching the first position to terminate movement beyond the said first position thereby to define said chamber between the platform and the bed of the vehicle.

11. The apparatus of claim 7 wherein there are four air bags disposed in said chamber individually adjacent to the four corners of the frame and platform and said inflating means includes a pneumatic system connected to a source of pneumatic pressure and individually to said air bags through individually operable valves whereby the air bags can be inflated to individual amounts of inflation to adjust the attitude of said platform in said second position and thereby the work object borne thereby.

12. The apparatus of claim 11 wherein said pneumatic system has four air release valves individual to the four air bags and individually operable to release air pressure from the air bags to return said platform to the first position in the desired attitude and thus the work object borne thereby.

13. The apparatus of claim 12 wherein the vehicle has a pneumatic brake system and said source of pneumatic pressure of the apparatus is said pneumatic brake system.