AU2010100107A4

AU2010100107A4 - Cutting tool for a shelled-nut

Info

Publication number: AU2010100107A4
Application number: AU2010100107A
Authority: AU
Inventors: Pao-Nan Chang
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-02-02
Filing date: 2010-02-02
Publication date: 2010-03-04
Anticipated expiration: 2018-02-02

Description

Regulation 3.2 AUSTRALIA PATENTS ACT 1990 COMPLETE SPECIFICATION FOR AN INNOVATION PATENT ORIGINAL Name of Applicant: Pao-Nan Chang Actual Inventor: Pao-Nan Chang Address for Service: C/- MADDERNS, First Floor, 64 Hindmarsh Square, Adelaide, South Australia, Australia Invention title: CUTTING TOOL FOR A SHELLED-NUT The following statement is a full description of this invention, including the best method of performing it known to us.

2 CUTTING TOOL FOR A SHELLED-NUT 1. Field of the Utility model The present utility model relates to a cutting tool for a shelled-nut, and 5 more particularly to a cutting tool that can cut hard shells of shelled-nuts easily and conveniently. 2. Description of Related Art In general, a shelled-nut has a hard shell to protect the kernel in the shelled-nut. When a person wants to eat the kernel, a hammer or a nutcracker is 10 needed to break the hard shell. However, the breaking force applied on the hard shell of the shelled-nut by the hammer or the nutcracker is controlled by the user. If the breaking force is insufficient to break the hard shell, the user has to operate the hammer or the nutcracker several times to break the hard shell, and this is arduous. If the 15 breaking force applied on the hard shell is too large, the kernel in the hard shell may be easily damaged. Additionally, hammers or nutcrackers are inconvenient for mass production of kernels in a factory. To overcome the shortcomings, the present utility model provides a cutting tool for a shelled-nut to mitigate or obviate the aforementioned problems. 20 IN THE DRAWINGS: Fig. 1 is a perspective view of a cutting tool for a shelled-nut in accordance with the present utility model; Fig. 2 is an exploded perspective view of the cutting tool in Fig. 1; Fig. 2A is an enlarged perspective view of the cutting tool in Fig. 2; and 3 Fig. 3 is a cross sectional side view of the cutting tool in Fig. 1, showing a shelled-nut being broken. With reference to Figs. 1, 2 and 2A, a cutting tool for a shelled-nut in accordance with the present utility model comprises a base (10) and a plunger 5 (20). The base (10) has an inner end, a middle, an outer end, an external surface, a mounting recess (11), a first blade (12), two guiding grooves (13), two holding protrusions (14), a positioning slot (15) and a mounting head (16). The mounting recess (11) is concave, is formed in the inner end of the 10 base (10) and has a bottom face. The first blade (12) is mounted on and protrudes from the bottom face of the mounting recess (11) and has two free ends. The guiding grooves (13) are longitudinally formed in the external surface of the base (10) from the inner end to the middle and communicate with 15 the mounting recess (11) near the free ends of the first blade (12). The holding protrusions (14) are formed on and protrude from the bottom face of the mounting recess (11) beside the first blade (12). The positioning slot (15) is longitudinally formed in the external surface of the base (10) near the outer end. 20 The mounting head ('16) is formed on and protrudes from the outer end of the base (10). The plunger (20) is detachably attached to the base (10) and has an attaching end, a mounting end, an external surface, two guiding arms (21), a second blade (23), a positioning slot (24) and a mounting head (25).

4 The attaching end of the plunger (20) is movably attached to the inner end of the base (10) and has a curved surface (22) facing the bottom face of the mounting recess (11) of the base (10) for holding a shelled-nut (30) inside. The guiding arms (21) are longitudinally formed on and protrude from 5 the attaching end of the plunger (20), are respectively mounted in the guiding grooves (13) of the base (10) and each guiding arm (21) has an inner surface formed with the curves surface (22) of the attaching end of the plunger (20). The second blade (23) may be U-shaped, is mounted on and protrudes from the curve surface (22) of the attaching end of the plunger (20) and the inner 10 surfaces of the guiding arms (21) to form an annular knife ring in cooperation with the first blade (12) when the knife tubes (10, 20) are connected to each other. Preferably, the second blade (23) on the curved surface (22) of the attaching end of the plunger (20) is wider than the second blade (23) on the inner surfaces of the guiding arms (21). 15 The positioning slot (24) is longitudinally formed in the external surface of the plunger (20) near the mounting end. The mounting head (25) is formed on and protrudes from the mounting end of the plunger (20). With reference to Figs. 2 and 3, when the cutting tool in accordance with 20 the present utility model is used to split a shelled-nut (30), the mounting heads (16, 25) of the knife tubes (10, 20) are respectively and securely connected to two ends of a driving machine. The positioning slots (15, 24) are also connected to the driving machine to provide an orientation effect to make the guiding arms (21) aligning with the guiding grooves (13).

A shelled-nut (30) is put in the mounting recess (11) of the base (10) and contacts with the first blade (12) and the holding protrusions (14). Then, the knife tubes (10, 20) are moved toward each other by the driving machine to make the second blade (23) pressing against the shelled-nut (30) in the mounting recess (11) 5 of the base (10). When the shelled-nut (30) is pressed between the knife tubes (10, 20), the hard shell of the shelled-nut (30) can be broken by the blades (12, 23). During movements of the knife tubes (10, 20) toward each other, the guiding arms (21) of the plunger (20) slide in the guiding slots (13) of the base (30) to actually align the second blade (23) with the first blade (12) to form an 10 annular knife ring around the hard shell of the shelled-nut (30). In addition, the second blade (23) on the inner surfaces of the guiding arms (21) can pre-cut cutting lines on the hard shell of the shelled-nut (30) before the blades (12, 23) are pressed against the hard shell of the shelled-nut (30). Consequently, the cutting tool in accordance with the present utility model can break the shelled-nut 15 (30) easily by moving the knife tubes (10, 20) toward each other. Furthermore, the knife tubes (10, 20) are moved toward each other by the driving machine with the same breaking force for the shelled-nut (30) to prevent repeated operation and prevent the kernel of the shelled-nut (30) from damaging, and this is convenient in use. 20 Even though numerous characteristics and advantages of the present utility model have been set forth in the foregoing description, together with details of the structure and features of the invention, the disclosure is illustrative only. Changes may be made in the details, especially in matters of shape, size, and arrangement of parts within the principles of the utility model to the full 6 extent indicated by the broad general meaning of the terms in which the appended claims are expressed.

Claims

1. A cutting tool for a shelled-nut comprising a base having an inner end; 5 a middle; an outer end; an external surface; a mounting recess being concave, formed in the inner end of the base and having a bottom face; and 10 a first blade mounted on and protruding from the bottom face of the mounting recess and having two free ends; and a plunger attached to the base and having an attaching end movably attached to the inner end of the base and having a curved surface facing the bottom face of the mounting recess of the 15 base; a mounting end; an external surface; two guiding arms; a curve surface formed in attaching end of the plunger; and 20 a second blade mounted on and protruding from the curve surface of the plunger and facing to the first blade.

2. The cutting tool for a shelled-nut as claimed in claim 1, wherein the base has two guiding grooves longitudinally formed in the external surface of the base from the inner end to the middle and communicating with the 8 mounting recess near the free ends of the first blade; the plunger has two guiding arms longitudinally formed on and protruding from the attaching end of the plunger, respectively mounted in the guiding grooves of the base and each guiding arm having an inner surface formed 5 with the curves surface of the attaching end of the plunger; and the second blade is U-shaped, is formed on and protrudes from the curve surface of the attaching end of the plunger and the inner surfaces of the guiding arms to form an annular knife ring with the first blade when the knife tubes are connected to each other. 10

3. The cutting tool for a shelled-nut as claimed in claim I or 2, wherein the base has two holding protrusions formed on and protruding from the bottom face of the mounting recess beside the first blade.

4. The cutting tool for a shelled-nut as claimed in claim 3, wherein the base has 15 a positioning slot longitudinally formed in the external surface of the base near the outer end; and a mounting head formed on and protruding from the outer end of the base; and the plunger has 20 a positioning slot longitudinally formed in the external surface of the plunger near the mounting end; and a mounting head formed on and protruding from the mounting end of the plunger.

5. The cutting tool for a shelled-nut as claimed in claim 4, wherein the 9 second blade on the curved surface of the attaching end of the plunger is wider than the second blade on the inner surfaces of the guiding arms.