Leveling device

• US 7,774,950 B2
• Filed: 10/03/2008
• Issued: 08/17/2010
• Est. Priority Date: 10/03/2008
• Status: Expired due to Fees

• Current Assignee: Matthew W. Lasley
• Original Assignee: Matthew W. Lasley
• Inventors: Lasley, Matthew W.
• Primary Examiner(s): Bennett; G. Bradley
• Application Number:
  US12/245,465
• Publication Number:
  US 20100084523A1
• Time in Patent Office: 683 Days
• Field of Search: 335/142, 335/15, 335/21, 335/33, 335/611, 335/612, 335/613
• US Class Current: 33/533
• CPC Class Codes: A47B 9/06 with vertical toothed rack
• CPC Class Codes: A47B 91/10 adapted to mounting on inclined floor

Abstract

A leveling device comprises a generally horizontal frame configured to hold a number of parallel, closely spaced support legs in a generally vertical configuration. The support legs are slidably mounted in collars formed in the frame such that the legs may slide up and down within the collars. The support legs are configured to move independently of one another and to be locked into place using a locking mechanism configured to frictionally or mechanically engage the support legs once the legs are positioned to match the contour of the ground or other uneven surface. Multiple embodiments of the locking mechanism are disclosed. The leveling device of the present invention not only may be used to level an object on an uneven surface, but also can be used to adjust the height of an object on a even or uneven surface by adjusting the length of the support legs.

Claims

1. A leveling device for leveling an object on an uneven surface, the leveling device comprising:

a frame having a top surface, a bottom surface, a closed side, an open side and a length, wherein the top surface and the bottom surface each have a single row of closely spaced collars formed therein along the length of the frame, the collars formed in the top surface being vertically aligned with corresponding collars formed in the bottom surface;

a plurality of support legs extending through the frame, each of the support legs extending through one of the collars formed in the top surface and the corresponding collar formed in the bottom surface, and each of the support legs having a plurality of protuberances formed along a length thereof; and

a pressure plate rotatably and hingedly mounted to the frame, the pressure plate configured to close the open side of the frame and to engage the plurality of support legs, wherein the pressure plate is configured with a plurality of mating protuberances, the mating protuberances configured to matingly engage the protuberances of the support legs to lock the support legs into a fixed position,

wherein when the pressure plate is rotated to close the open side of the frame, the plurality of mating protuberances of the pressure plate engage the plurality of protuberances of the support legs thereby locking the support legs into the fixed position.

2. The leveling device in accordance with claim 1 wherein the frame is linear.

3. The leveling device in accordance with claim 1 wherein the frame is non-linear.

4. The leveling device in accordance with claim 1 wherein the plurality of support legs have a circular cross-section.

5. The leveling device in accordance with claim 1 wherein the plurality of support legs have a non-circular circular cross-section.

6. The leveling device in accordance with claim 1 wherein the plurality of protuberances of the support legs comprise teeth.

7. The leveling device in accordance with claim 1 wherein the plurality of mating protuberances of the pressure plate comprise teeth.

8. The leveling device in accordance with claim 1 wherein the pressure plate is hingedly mounted to the frame above the open side of the frame.

9. The leveling device in accordance with claim 1 wherein the pressure plate further comprises a handle, the handle configured to matingly engage a latch disposed on the frame.

10. The leveling device in accordance with claim 1 wherein the plurality of support legs further comprise caps configured to prevent the plurality of support legs from fully passing through the collars formed in the top surface of the frame.

11. The leveling device in accordance with claim 1 wherein the plurality of support legs further comprise a flat bottom surface.

12. The leveling device in accordance with claim 1 wherein the pressure plate further engages the plurality of support legs by forcing the plurality of support legs into frictional engagement with the collars formed in the top surface of the frame.

13. The leveling device in accordance with claim 1 wherein the pressure plate further engages the plurality of support legs by forcing the plurality of support legs into frictional engagement with the collars formed in the bottom surface of the frame.

14. The leveling device in accordance with claim 1 wherein the pressure plate further engages the plurality of support legs by forcing the plurality of support legs into simultaneous frictional engagement with the collars formed in the top surface of the frame and the collars formed in the bottom frame.

15. The leveling device in accordance with claim 1 wherein the the plurality of protuberances of the support legs are formed along at least one side of the support legs.

16. The leveling device in accordance with claim 1 wherein the device is configured to adjust a distance between the object and the uneven surface.

17. A leveling device for leveling an object on an uneven surface, the leveling device comprising:

a frame having a top surface, a bottom surface, a closed side, an open side and a length, wherein the top surface and the bottom surface each have a single row of closely spaced collars formed therein along the length of the frame, the collars formed in the top surface being vertically aligned with corresponding collars formed in the bottom surface;

a plurality of support legs extending through the frame, each of the support legs extending through one of the collars formed in the top surface and the corresponding collar formed in the bottom surface, and each of the support legs having a plurality of protuberances formed along a length thereof; and

a pressure plate disposed parallel to the closed side of the frame and the open side of the frame, and disposed adjacent to and spaced apart from the open side of the frame, the pressure plate configured to close the open side of the frame by moving toward the open side of the frame and to engage the plurality of support legs,

wherein the pressure plate is configured with a plurality of mating protuberances, the mating protuberances configured to matingly engage the protuberances of the support legs to lock the support legs into a fixed position, and

wherein movement of the pressure plate is controlled by a cam mechanism.