Apparatuses and methods for an improved vehicle jack

• US 8,251,349 B2
• Filed: 10/17/2011
• Issued: 08/28/2012
• Est. Priority Date: 10/24/2008
• Status: Active Grant

• Current Assignee: Mojack Distributors LLC
• Original Assignee: Mojack Distributors LLC
• Inventors: Drake, Daniel Vernon
• Primary Examiner(s): Wilson, Lee D
• Assistant Examiner(s): Hall, Jr., Tyrone V
• Application Number:
  US13/275,234
• Publication Number:
  US 20120032124A1
• Time in Patent Office: 316 Days
• Field of Search: 254/4.C, 254/4.B, 254/4.R, 254/6.C, 254/6.B, 254/6.R, 254/12, 254/112, 254/108, 187/210, 187/208, 187/207, 187/216
• US Class Current: 254/4.C
• CPC Class Codes: B66F 5/02 with mechanical lifting gear
• CPC Class Codes: B66F 7/02 with platforms suspended from ropes, cables, or chains or screws and movable along pillars
• CPC Class Codes: B66F 7/28 Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions

Abstract

Various embodiments of a vehicle jack include a base, an upright support mounted adjacent to and extending upwardly from the base, a toothed rack, a toothed bar pin, and a release handle. The toothed rack has a first end and a second end and defines a plurality of ratchet troughs therebetween, and the toothed rack is mounted adjacent the upright support. The ratchet assembly is adapted to move along a path defined by the upright support, and the toothed bar pin, which is mounted adjacent the ratchet assembly, is adapted to selectively engage a portion of the toothed rack adjacent one of the plurality of ratchet troughs as the ratchet assembly moves along the path. The release handle is mounted adjacent the second end of the toothed rack, and the release handle is adapted to selectively disengage the toothed bar pin from one of the plurality of ratchet troughs.

Claims

1. A wheel engagement mechanism for operation with a jack for engaging two wheels of a multi-wheeled vehicle, comprising:

a base; and

a lift frame mounted adjacent to the base for engaging the wheels, comprising;

a first wheel support assembly and an adjacent second wheel support assembly, each wheel support assembly supporting a wheel, comprising;

a rectangular frame including;

a front support for supporting a front of the wheel;

a rear support for supporting a rear of the wheel;

a ratchet mechanism connected to the lift frame for selectively supporting the lift frame in an elevated position, the ratchet mechanism comprising;

a toothed bar, the toothed bar including a plurality of teeth; and

an engagement member connected to the lift frame; and

a mechanism whereby the toothed bar is movable upwardly and away from the engagement member such that the engagement member disengages from the toothed bar.

2. The wheel engagement mechanism of claim 1 used with a jack, further comprising a lift frame elevation assembly connected to the lift frame for selectively raising and selectively lowering the lift frame.

3. The wheel engagement mechanism of claim 2, wherein the lift frame elevation assembly is an automatic drive.

4. The wheel engagement mechanism of claim 2, wherein the lift frame elevation assembly further comprises a pushing force member having a first end and a second end, in which the first end is connected to the lift frame and the second end is connected to the base.

5. The wheel engagement mechanism of claim 1, wherein:

the plurality of teeth extend outwardly from the toothed bar; and

the engagement member is a pin.

6. The wheel engagement mechanism of claim 1 for use with a jack, further comprising:

an upright support mounted adjacent to the base; and

wherein the lift frame is mounted to the upright support.

7. The wheel engagement mechanism of claim 1 for use with a jack, wherein the front support and back support are wheel support rollers.

8. A jack for lifting two wheels of a four wheeled vehicle off of a support surface, the jack comprising:

a base supported by the support surface;

an upright support having a first end and a second end, the first end mounted adjacent to the base;

a lift frame connected to the upright support, the lift frame comprising a wheel support assembly for engaging the front wheels of the vehicle wherein each wheel front wheel is supported at a front by a wheel front support, and at a rear by a wheel rear support; and

a lift frame elevation assembly connected to the upright support for selectively raising and selectively lowering the lift frame; and

a ratchet mechanism connected to the lift frame for selectively supporting the lift frame in an elevated position, the ratchet mechanism comprising;

a toothed bar, the toothed bar including a plurality of teeth;

an engagement member connected to the lift frame, wherein the toothed bar remains stationary as the engagement member slidably engages the teeth of the toothed bar as the lift frame is elevated; and

a mechanism whereby the engagement member disengages from the toothed bar by moving in a substantially upward direction.

9. The jack of claim 8, wherein the wheel front support and the wheel rear support are spaced apart within the wheel support assembly.

10. The jack of claim 9, wherein the wheel front support is a roller and the wheel rear support is a roller.

11. The jack of claim 8, wherein the wheel support assembly is adjustable on the lift frame for selectively positioning the wheel support assembly under the front wheel.

12. The jack of claim 8, wherein the upright support extends upwardly from the base.

13. The jack of claim 12, wherein the upright support extends substantially perpendicular to the base.

14. The jack of claim 12, wherein the lift frame elevation assembly further comprising a pulling force member having a first end connected to the lift frame and a second end connected adjacent to the second end of the upright support.

15. The jack of claim 12, wherein the lift frame elevation assembly further comprising a pushing force member having a first end and a second end, the first end connected to the lift frame and the second end connected to the base.

16. The jack of claim 12, further comprising a base handle mounted adjacent the second end of the upright support.

17. The jack of claim 12, wherein:

the lift frame further comprises a first roller and a second roller, wherein the first roller is disposed adjacent a front surface of the upright support and the second roller is disposed adjacent a rear surface of the upright support, and a channel is defined between the first and second rollers; and

the upright support extends through the channel.

18. The jack of claim 17, wherein the lift frame further comprises a third roller and a fourth roller, wherein the third roller is disposed adjacent a first side surface of the upright support and the fourth roller is disposed adjacent a second side surface opposing and spaced apart from the first side surface of the upright support, and the channel is further defined between the third and fourth rollers.

19. The jack of claim 12, wherein at least one wheel is mounted adjacent a first end of the upright support.

20. A method of assembling a vehicle jack, comprising the steps of:

providing a base;

providing a wheel engagement mechanism including a first wheel support assembly and an adjacent second wheel support assembly, each wheel support assembly comprising a rectangular frame including a front support and a rear support;

connecting the wheel engagement mechanism to the base;

providing an elevation assembly including a first end and a second end;

connecting the elevation assembly first end to the wheel engagement mechanism;

connecting the elevation assembly second end to the base;

providing a ratchet mechanism comprising teeth connected to the base, and a ratchet engagement member connected to the wheel engagement mechanism, wherein the teeth remain stationary as the ratchet engagement member slidably engages the teeth as the wheel engagement mechanism is elevated; and

providing a mechanism whereby the toothed bar is movable upwardly and away from the engagement member such that the engagement member disengages from the toothed bar.

21. The method of claim 20, wherein the elevation assembly is an automatic drive.

22. A wheel engagement mechanism for operation with a jack for engaging two wheels of a multi-wheeled vehicle, comprising:

a base; and

a lift frame mounted adjacent to the base for engaging the wheels, comprising;

a first wheel support assembly and an adjacent second wheel support assembly, each wheel support assembly supporting a wheel, comprising;

a rectangular frame including;

a front support for supporting a front of the wheel;

a rear support for supporting a rear of the wheel; and

a ratchet mechanism connected to the lift frame for selectively supporting the lift frame in an elevated position, the ratchet mechanism comprising;

a first toothed bar having a plurality of teeth;

a second toothed bar having a plurality of teeth mounted opposite the first toothed bar; and

an engagement member connected to the lift frame and engaging both the first toothed bar and the second toothed bar for selectively supporting the lift frame.