MULTI-FUNCTIONAL AND CONVERTIBLE HAND TRUCK

• US 20110057402A1
• Filed: 08/09/2010
• Published: 03/10/2011
• Est. Priority Date: 09/09/2009
• Status: Abandoned Application

• Current Assignee: Keith Jewell
• Original Assignee: Keith Jewell
• Inventors: Jewell, Keith
• Application Number:
  US12/852,842
• Publication Number:
  US 20110057402A1
• Time in Patent Office: Days
• US Class Current: 280/47.18
• CPC Class Codes: B62B 1/002 convertible from a one-axled vehicle to a two-axled vehicle
• CPC Class Codes: B62B 1/12 involving parts being adjustable, collapsible, attachable, detachable, or convertible
• CPC Class Codes: B62B 1/206 and capable of being completely disassembled
• CPC Class Codes: B62B 2205/006 dismountable
• CPC Class Codes: B62B 2205/104 Detachable wheel units, e.g. together with the wheel shaft
• CPC Class Codes: B62B 2301/10 Adjusting the position of the wheel axles to increase stability

Abstract

A multi-functional and convertible hand truck has a combination of release and trigger mechanism to dump the load when operated in wheelbarrow or trailer mode, a damping system and a four wheel brake mechanism. The damping system comprises of a bar that is pulled against the tires of the wheelbarrow through a spring and a mount to hold the assembly. To best fulfill the usability requirement, wheel axle can be positioned slightly forward to the center of gravity. An automatic dumping can be achieved by moving the wheel barrow box relative to the box pivot. The hand truck plate assembly has a pair of brackets welded onto the wheel carriage such that the plate and tires flush when the hand truck is upright. The wheel carriage can be stiffened by using a cross brace.

Claims

1. A multi-functional and convertible hand truck, comprising:

a wheel carriage assembly for supporting a two pair of wheels comprising a wheel carriage and a brake assembly, wherein said brake assembly is secured inside said wheel carriage assembly and said wheel carriage having a cross brace for stiffening said wheel carriage assembly;

a handle assembly for lifting the said hand truck, wherein said handle assembly comprises of a attachment bar and a handle bar;

a plate assembly comprising a pair of wheel brackets for connecting a plate and said wheel carriage; and

a carriage attachment assembly comprising said plate assembly for connecting the said carriage assembly with said wheel carriage assembly.

2. The hand truck of claim 1 can function as a wheelbarrow with automatic dumping by moving said wheelbarrow box relative to a box pivot.

3. The hand truck of claim 1 can function as a wheelbarrow by positioning an axle of said two pair of wheels slightly forward relative to center of gravity of said wheelbarrow on whole.

4. The hand truck of claim 1, wherein said brake assembly comprises of a brake bar and a mount, wherein said bar is pulled against at least one tier of said two pair of wheels.

5. The hand truck of claim 1, wherein said plate and said at least one tires are flushed when said hand truck is upright.

6. The hand truck of claim 1 further comprises of a custom latch with hand lever to reduce force supplied by user.

7. The hand truck of claim 1, wherein said handle bar is thick and comprises of a cap or plate welded at ends.

8. The hand truck of claim 1, wherein said wheel carriage assembly can be quickly rearranged using a plurality of removable cotter pins.

9. The hand truck of claim 1, wherein said carriage attachment assembly can be a hand truck attachment assembly.

10. The hand truck of claim 1, wherein said carriage attachment assembly can be a wheelbarrow attachment assembly.

11. The hand truck of claim 1, wherein said carriage attachment assembly can be a wagon frame attachment assembly.

12. The hand truck of claim 1, wherein said carriage attachment assembly can be a fork truck attachment assembly.

13. The hand truck of claim 1, wherein said carriage attachment assembly can be a trailer attachment assembly.

14. The hand truck of claim 1, wherein said pair of wheel brackets does not provide enough stopping force, spring rate can be increased or a knurl can be placed on said brake bar.