Hand truck

• US 7,487,976 B1
• Filed: 06/15/2006
• Issued: 02/10/2009
• Est. Priority Date: 06/15/2006
• Status: Active Grant

• Current Assignee: Mychael J. Williams
• Original Assignee: Mychael J. Williams
• Inventors: Williams, Mychael J.
• Primary Examiner(s): Restifo; Jeffrey J
• Application Number:
  US11/453,069
• Time in Patent Office: 971 Days
• Field of Search: 280/43, 280/43.1, 280/43.11, 280/43.13, 280/47.21, 280/47.27, 280/47.22, 280/11.223
• US Class Current: 280/47.27
• CPC Class Codes: B60B 19/00 Wheels not otherwise provided for or having characteristics specified in one of the subgroups of this group
• CPC Class Codes: B60B 2200/43 Carts
• CPC Class Codes: B60B 27/065 characterised by the fixation of the hub to the axle
• CPC Class Codes: B60B 3/001 Lightweight wheels, e.g. for strollers or toys
• CPC Class Codes: B60B 3/048 the rim being rotatably mounted to the wheel disc
• CPC Class Codes: B60B 35/04 straight
• CPC Class Codes: B60Y 2200/48 Stair-climbing vehicles
• CPC Class Codes: B62B 5/028 with excentrically mounted wheels
• CPC Class Codes: B62B 5/049 locking against movement by contacting the floor or a wall

Abstract

A hand truck including a body, a load supporting platform, an axle, and a wheel assembly having a pair of wheels. Each wheel has an inner race that is freely rotatable within an outer ground-engaging portion via bearings disposed there between. Each wheel also includes at least one guide member that is mounted to the inner race so that rotation of the guide member rotates the inner race. A slide member is secured to the guide member so that the slide member is movable along the guide member. The axle is attached to the slide member and to the frame so that the body and the guide member are in a fixed parallel relationship. Accordingly, if the body is inclined, the guide member is likewise inclined to serve as a ramp. Due to this structure, a user can easily tip the hand truck, traverse obstacles, and stabilize the hand truck.

Claims

1. A hand truck comprising:

a body;

a load support platform extending from a lower end of the body;

an axle secured in fixed relationship to the body;

a pair of wheels located at the lower end of the body, each including;

an inner annular race;

an outer annular ground engaging portion that surrounds the inner race;

bearings disposed between the inner and outer races so that the inner and outer races are rotatable relative to each other;

at least one guide member fixedly mounted within an inner area defined by the inner race and fixedly mounted within, and secured at opposite ends thereof to, the inner race so as to be rotatable therewith;

a slide member slidably mounted to the at least one guide member so that the slide member is freely movable across the inner race; and

the axle being mounted to the slide member of each wheel so that the axle is moveable with the slide members across the inner race and between generally opposite sides of the inner race so that the position of the axle is movable relative to a central axis of the wheel and so that the body can pivot with the inner race relative the outer race.

2. The hand truck of claim 1, wherein the axle is a pair of stub shafts.

3. The hand truck of claim 1, wherein each wheel further includes reinforcing means for providing additional support.

4. The hand truck of claim 3, wherein the reinforcing means include a flange located between the at least one guiding member and the inner race.

5. The hand truck of claim 1, wherein the guide member includes two parallel rods that extend between opposite sides of the inner race.

6. The hand truck of claim 5, wherein the parallel rods are equally spaced on opposite sides of a central axis of the inner race.

7. The hand truck of claim 1, wherein the slide member includes at least one channel there through for receiving the at least one guide member.

8. The hand truck of claim 1, wherein the axle is held in position relative to the slide member by securing means.

9. A wheel assembly for a hand truck, comprising:

at least one axle secured in fixed relationship to a body of the hand truck;

a pair of wheels, each including;

an inner annular race;

an outer annular race having a ground engaging portion that surrounds the inner race;

bearings disposed between the inner and outer races so that the inner and outer races are rotatable relative to each other;

at least one guide member extending across an inner area defined by the inner race and fixedly mounted within, and secured at opposite ends thereof to, the inner race so as to be rotatable therewith;

a slide member slidably mounted to the at least one guide member so that the slide member is freely movable from adjacent one side of the inner race to another side thereof; and

the axle being mounted to the slide member of each wheel so that the axle is moveable with the slide members between generally opposite sides of the inner race and so that the body can pivot with the inner race relative the outer race and so that the position of the axle is movable relative to a central axis of the wheels.

10. The wheel assembly of claim 9, wherein the axle is a pair of stub shafts.

11. The wheel assembly of claim 9, wherein each wheel further includes reinforcing means for providing additional support.

12. The wheel assembly of claim 9, wherein the guide member includes two parallel rods that extend between opposite sides of the inner race.

13. The wheel assembly of claim 12, wherein the parallel rods are equally spaced on opposite sides of a central axis of the inner race.

14. The wheel assembly of claim 9, wherein the slide member includes at least one channel there through for receiving the at least one guide member.

15. The wheel assembly of claim 9, wherein the axle is held in position relative to the slide member by securing means.

16. A wheel for a hand truck, wherein the hand truck includes an axle secured in fixed relationship to a body, the wheel comprising:

an inner annular race;

an outer annular ground engaging portion that surrounds the inner race;

bearings disposed between the inner and outer races so that the inner and outer races are rotatable relative to each other;

at least one guide member fixedly mounted within and secured across and inner area defined within the inner race so as to be rotatable therewith;

a slide member freely slidably mounted to the at least one guide member; and

securing means for mounting the axle to the slide member so that the axle is moveable with the slide member between opposite sides of the inner race when the axle is mounted thereto and so that the body can pivot with the inner race relative the outer race and so that the position of the axle is movable relative to a central axis of the wheel.

17. The wheel of claim 16, further comprising reinforcing means for providing additional support.

18. The wheel of claim 16, wherein the guide member includes two parallel rods that extend between opposite sides of the inner race.

19. The wheel of claim 18, wherein the parallel rods are equally spaced on opposite sides of a central axis of the inner race.

20. The wheel of claim 16, wherein the slide member includes at least one channel there through for receiving the at least one guide member.