WOOD SPLITTING AID

Abstract

The wood splitting aid of the invention includes a resilient bucket that attaches at its bottom to a base block bucket of similar shape and size to be used in conjunction with a hand-splitter such as an ax or splitting-mall. The resilient or flexible upper bucket holds a plurality of split pieces of corded firewood in an upright position for hand chopping and absorbs both horizontal and vertical forces of wood splitting. The split wood pieces are maintained in a general upright position adjacent their neighboring pieces. The base block bucket provides both a safe and ergonomic chopping height which absorbs and distributes the predominantly remaining vertical force of wood-splitting action against solid ground. The buckets are detachably connected bottom to bottom and are nesting when disconnected for easy portability, use, storage and reuse in an urban environment.

Claims

1. A firewood splitting aid comprising: (a) a pair of generally right-cylindrical receptacles adapted to be secured base to base upright along a common vertical axis central to each of said receptacles for chopping, (b) the receptacle pair comprising: i. an upper firewood work piece receptacle including: A. an open top, B. a flexible, resilient and continuous side wall, and, C. a base coupled to the work piece receptacle side wall, D. adapted as a structure: to resiliently restrain a collection of firewood pieces against forces and movement associated with a chopping action, and, to transmit vertical forces and movement associated with a chopping action through said base, ii. a lower chopping block receptacle including: A. an open bottom, B. a substantially rigid continuous side wall, and, C. a base coupled to the block receptacle side wall, D. adapted as a structure to transmit chopping forces, when inverted, from the upper receptacle, through the lower chopping block receptacle to a ground plane surface adjacent the open bottom, (c) mating base-to-base structure adapted: i. to secure and hold the receptacle base structures in contiguous contact with each other for chopping, and, ii. to disengage the receptacles for storage.

2. A firewood splitting aid as claimed in claim 1 wherein the base-to-base structure includes male and female threaded portions.

3. A firewood splitting aid as claimed in claim 2 wherein the base-to-base structure intimately mates the base structures together for chopping.

4. A firewood splitting aid as claimed in claim 3 wherein the base-to-base structure includes circular contact regions on at least one of said bases centered on the vertical axis.

5. A firewood splitting aid as claimed in claim 4 wherein the base-to-base structure includes annular contact regions on each of said bases centered upon the vertical axis.

6. A firewood splitting aid as claimed in claim 4 wherein the threaded portions are adapted to draw the bases into secure intimate contact with each other.

7. A firewood splitting aid as claimed in claim 6 wherein the upper receptacle base includes stiffening structure.

8. A firewood splitting aid as claimed in claim 7 wherein the block receptacle includes stiffening structure in at least one of its side wall or its base.

9. A firewood splitting aid as claimed in claim 6 wherein the threaded portions are aligned with the respective side walls at the extremity of respective bases.

10. A firewood splitting aid as claimed in claim 9 wherein base-to-base structure includes a male or female threaded portion integral with each of the receptacles and an annular collar.

11. A firewood splitting aid as claimed in claim 10 wherein the annular collar includes a threaded portion.

12. A firewood splitting aid as claimed in claim 11 wherein the annular collar is adapted to receive each receptacle threaded portion to the extent of a central line perpendicular to the common vertical axis.

13. A firewood splitting aid as claimed in claim 12 wherein the annular collar portion is adapted to intimately contact the side walls.

14. A firewood splitting aid as claimed in claim 3 wherein the upper receptacle side wall is tapered outwards from base to top.

15. A firewood splitting aid as claimed in claim 14 wherein the upper receptacle includes annular stiffeners perpendicular to the common vertical axis.

16. A firewood splitting aid as claimed in claim 15 wherein the block receptacle is tapered outwards from base to open bottom.

17. A firewood splitting aid as claimed in claim 15 wherein the block receptacle includes horizontal and axial stiffeners.

18. A firewood splitting aid as claimed in claim 1 wherein the upper and lower receptacles are adapted to nest when separated for storage.

Description

DRAWINGS

[0035] FIG. 01 is an overall perspective view of an embodiment of the invention in a fully assembled ready-to-use condition

[0036] FIG. 02 is another perspective view of the embodiment of FIG. 1 with a supply of choppable work pieces.

[0037] FIG. 03 is a interior plan view of the 2 components of the embodiment of FIGS. 1 and 2, shown disassembled.

[0038] FIG. 04 is a exterior plan view of the 2 components of the embodiment of FIG. 3.

[0039] FIG. 05 is a central vertical cross-section of an alternative embodiment of the invention shown exploded along the vertical axis and ready for assembly, then use.

[0040] FIG. 06 is a further cross-section of the embodiment of FIG. 5, shown ready dis-assembled and ready for storage by telescoping along the vertical axis.

[0041] FIG. 07 is a further vertical central cross-section of the embodiment of FIGS. 5 and 6, shown with the upper receptacle upright, the lower receptacle inverted and ready for use by threading the assembly together along a vertical axis.

[0042] FIGS. 08 and 08A are a cross-section of a preferred embodiment of FIG. 5, shown fully assembled by rotation of the upper and lower receptacles to lock the threads, and disassembled, in partial perspective.

DESCRIPTION OF THE PREFERRED EMBODIMENT

[0043] A preferred embodiment of the firewood chopping aid of the invention 1 is shown pictorially in FIGS. 1 through 4. In FIGS. 01 and 02 the aid 1 is shown fully assembled and ready for use. In FIGS. 03 and 04 the aid is shown disassembled on its way to storage. An upper chopping receptacle 2 (preferably in the form of an upstanding bucket) is formed of resilient and tear resistant material with a generally right-cylindrical (preferably continuous) outer wall 3 and an impact resisting floor 4 (See FIGS. 3 and 4). The upper receptacle in use is shown in FIGS. 01 and 02 upstanding with its open top 5 upright on a main aid axis 6 with a upwardly opening tapered configuration 7. Chopping forces upon impact and upon splitting are transmitted vertically and absorbed horizontally by the resilient outer wall 3.

[0044] Floor 7 is in turn supported upon a lower block receptacle 8 which is preferably cylindrical and formed of impact resisting non-resilient material so as to transmit.

[0045] Firewood pieces 9 are inserted into the upper bucket 2 where they are held in a generally upright condition ready for safe and convenient chopping action by the user, as shown in FIG. 2. The continuous thin side walls 3 of the upper bucket 2 restrain the chopped wood pieces 9 and any stray equipment actions by resiliently resisting non-vertical impact forces and returning to their original configuration (as shown in FIG. 02) once the impact forces have subsided. Preferably upper bucket receptacle 2 is flared or tapered outward from base to open top.

[0046] Preferably receptacles 2 and 8 are secured together in intimate contiguous contact as by threading so as to be co-axial along main vertical axis 6 and perpendicular to a ground plane surface when in use. FIG. 02 shows the chopping aid in its best-use condition with a variety of wood pieces 9 mutually self-supporting with the outer wall 3 and ready for reduction in to kindling.

[0047] FIG. 03 shows the aid 1 in disassembled condition with lower receptacle 8 inverted to show its interior. Main aid axis 6 includes upper receptacle central axis 10 and lower receptacle central axis 11 co-axially upon re-assembly as per FIGS. 01 and 02.

[0048] FIGS. 3 and 4 the base 4 surface of the upper bucket 2 is reinforced with a circular horizontal stiffener such as plywood which is adapted to absorb and transmit vertical chopping forces and restrain lateral movement. A threaded connection 13 in FIGS. 03 and 04 is added to the circular stiffener surface 4 for rotation of the upper bucket 2 about a vertical central axis 10 which screws the upper bucket 2 to the lower bucket 8 co-axially along main axis 6, thereby providing the working completed configuration of FIGS. 01 and 02.

[0049] The lower bucket of FIG. 4 is formed of sturdy non-resilient material and may be further reinforced by vertical, preferably inside mounted, support struts 14 as shown in FIG. 3. The bottom of the lower bucket is fitted with a female threaded connector 15 to be removably joined with threaded connection 13 on upper bucket 2 by being drawn in to intimate contiguous contact and secured there until release by the opposite motion. Preferably, the lower bucket receptacle is also tapered with a larger open bottom and a smaller base while remaining generally in the form of a tight-circular cylinder.

[0050] When assembled as shown in FIGS. 01 and 02 upper bucket 02 and lower bucket 8 are threadably abutted one to the other along main axis 6 for full support contiguous contact between upper floor 4 and lower base 12 and locked in place. The embodiment provides a unitary safe and ergonomic work platform and materials container. When disassembled, unthreaded, one bucket may be placed inside the other for convenient storage, other uses and immediate retrieval for use on a next occasion.

[0051] The outer wall 3 of the upper portion 2 is more flexible (rubberized), to absorb the increased horizontal forces of wood-splitting, than the lower portion 8 which is more rigid to absorb the reduced horizontal and increased vertical force of wood-splitting. The upper edge 16 alternatively incorporates a metal ring to prevent tearing during prolonged wood-splitting. The base 12 replicates the absorption and distribution of vertical force from wood-splitting of a traditional corded log, ie the chopping block. Together the receptacles 2 and 12 may be readily and simply manufactured, and then used and stored on an as needed basis, increasing safety.

[0052] FIGS. 05 through 07 show an alternative embodiment in which the receptacles may be molded. Both upper and lower buckets 20 and 21 are formed as individual units with integral exterior locking mating threads 22. The buckets include reinforced, preferably thickened, bottoms 4 and 12 formed into and as part of their respective side walls 3. Threading 22 is sufficient to provide a positive locking in the fully threaded condition wherein the bottom surfaces of the upper and lower buckets abut each other over some, or preferably their entire, contact surfaces. FIG. 05 shows the aid 1 ready for assembly. Firstly, axes 10 and 11 are aligned vertically co-axially along axis 6 and brought together a distance A along vertical direction 23. Secondly, the buckets 20 and 21 are threaded together in direction 24 until annular mating surface 25, 26 and circular mating surfaces 27 and 28 firmly abut one another.

[0053] In FIG. 06 the aid of FIGS. 05 and 07 is disassembled as by being unthreaded and the upper receptacle 20 inverted. In this position the upper receptacle 20 may be telescoped or nested over lower receptacle 21 by motion B along main axis 6 for a highly collapsed mutually contained storage of the aid as a single unit, or alternatively used as a separated pair of buckets for transportation of solid or liquid materials.

[0054] In FIG. 07 the chopping aid of FIGS. 05 and 06 is shown fully assembled and resting on ground plane 29 with main axis 6 vertical and perpendicular to ground plane 29. Chopping forces initially and nominally along axis 6 has resolved into vertical forces along direction E-E and horizontal forces along directions C and D. D direction forces are absorbed in to resilient outer wall 3. C direction forces are restrained in the bases 4 and 12. The majority of impact and other forces are transmitted along directions F-F through the abutting mating surfaces 25, 26, 27 and 28 along outer wall 30 of lower block receptacle 8 into the ground plane substantially isolated from lateral forces along directions C and D. The open circular form of lower block receptacle 21 and its non-resilient material add further restraint against horizontal forces H along the ground plane.

[0055] FIGS. 08 and 08a show the preferred embodiment of the invention. Upper and lower receptacle buckets 36 are formed identically as by the same mold but of resilient and non-resilient materials respectively. Reinforcing corners 34 may be provided. Identical male threads 30 and 31 respectively are formed in the upper and lower receptacles at their bases. A co-operating annular collar 32 (see particularly FIG. 08a) is provided with a single female thread 37 on its interior adapted to receive the male threads 30 and 31 by co-rotation of receptacles 36 about main axis 6 in direction 36. This treading brings upper and lower mating surfaces 34 and 35 into intimate bearing contact along direct A and locks the receptacles together. Preferably, collar 32 is threaded equally in respect of mating surfaces 34 and 35 so that mating surfaces 34 and 35 meet continuously along collar center line 33 and along the mating surfaces shown as 25 and 26 in FIG. 05.

[0056] Included here is a table showing the drawing references for convenience:

TABLE-US-00001 1 Embodiment FIG. 1-4 2 Upper receptacle 3 Outer wall 4 Upper floor 5 Open top 6 Main aid axis 7 Upwardly opening taper 8 Lower block receptacle 9 Firewood pieces 10 Upper receptacle axis 11 Lower receptacle axis 12 Lower base 13 Threaded connection 14 Interior support struts 15 Female threaded connector 16 Upper edge reinforcing wire 20 Upper bucket 21 Lower bucket 22 Exterior locking thread 23 Assembly direction 24 Threading direction 25 Upper annular contact surface 26 Lower annular contact surface A distance B telescoping C-H forces 27 Upper circular mating surface 28 Lower circular mating surface 29 Ground plane 30 Upper male thread 31 Lower male thread 32 Annular collar 33 Collar center line 34 Upper mating surface 35 Lower mating surface 36 Identical receptacles 37 Female thread for collar

[0057] Although the present invention has been disclosed and described with reference to certain embodiments thereof, it should be noted that other variations and modifications may be made, and it is intended that the description, drawings and claims cover the variations and modifications within the true scope of the invention.