1. A juice extractor, comprising:
a juice extractor base including upper and lower portions spaced in a vertical direction, with a concave surface formed on the upper portion of the juice extractor base and including a front end, a rear end spaced from the front end in a first axial direction perpendicular to the vertical direction, and a middle section intermediate the front and rear ends, with a height of the middle section of the concave surface in the vertical direction being smaller than that of the front end of the concave surface;
a rotating shaft rotatably installed above the concave surface of the juice extractor base and extending in a second axial direction perpendicular to the first axial and vertical directions; and
a juice squeezing wheel including a shaft hole, with the rotating shaft extending through the shaft hole to rotate with the juice squeezing wheel, with the juice squeezing wheel further including first and second ends spaced in a circumferential direction, with an opening defined between the first and second ends of the juice squeezing wheel, with a radial distance between the first end of the juice squeezing wheel and the shaft hole being smaller than that between the second end of the juice squeezing wheel and the shaft hole, with a crushing space defined between the juice squeezing wheel and the middle section of the concave surface of the juice extractor base for receiving a fruit which needs to be squeezed, and with the fruit in the crushing space crushed by the juice squeezing wheel to produce fruit juice when the rotating shaft rotates.
2. The juice extractor according to claim 1, with a radial distance between the second end of the juice squeezing wheel slightly smaller than that between the concave surface of the juice extractor base and the shaft hole, and with the second end of the juice squeezing wheel including a tapered distal portion.
3. The juice extractor according to claim 2, with at least one stopping protrusion disposed on the middle section of the concave surface for positioning the fruit placed in the crushing space of the juice extractor base, and with the juice squeezing wheel further including an outer surface extending gradually from the first end to the second end of the juice squeezing wheel to form an involute surface.
4. The juice extractor according to claim 3, with a height of the middle section of the concave surface in the vertical direction being smaller than that of the rear end of the concave surface, with the height of the front end of the concave surface being greater than that of the rear end of the concave surface, with a feeding inlet disposed above the front end of the concave surface so that the fruit can be placed in the crushing space of the juice extractor base from the feeding inlet, with the rear end of the concave surface extending outwardly to form a recess, with a residue outlet disposed in an outer side of the recess, and with a wing protruded outwardly from the first end of the juice squeezing wheel for pushing a fruit residue out from the residue outlet.
5. The juice extractor according to claim 4, with the juice extractor base further including first and second sides spaced in the second axial direction, with the upper portion of the first side of the juice extractor base including a retaining wall arranged higher than the concave surface, and with a juice outlet formed in a middle of the retaining wall and in communication with the middle section of the concave surface.
6. The juice extractor according to claim 5, with the rotating shaft including inner and outer sections spaced in the second axial direction, with the inner section of the rotating shaft located on the second side of the juice extractor base and operably connected to a motor, and with the outer section of the rotating shaft located above the concave surface of the juice extractor base in the vertical direction.
7. The juice extractor according to claim 5, with a blade extending circumferentially on the outer surface of the juice squeezing wheel.
8. The juice extractor according to claim 2, with at least one stopping protrusion disposed on the middle section of the concave surface for positioning the fruit placed in the crushing space of the juice extractor base, with the juice extractor base further including first and second sides spaced in the second axial direction, with the upper portion of the first side of the juice extractor base including a retaining wall arranged higher than the concave surface, and with a juice outlet formed in a middle of the retaining wall and in communication with the middle section of the concave surface.
9. The juice extractor according to claim 8, with a feeding inlet disposed above the front end of the concave surface, with the rear end of the concave surface extending outwardly to form a recess, with a staircase surface formed on an inner side of the recess, with a residue outlet disposed in an outer side of the recess, and with a wing protruded outwardly from the first end of the juice squeezing wheel for pushing a fruit residue out from the residue outlet.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A drilling head for a tubular shank, the drilling head comprising:
a body comprising an outer surface, and a duct formed from an opening in the outer surface and exiting through a rear of the body; and a replaceable insert affixed to the body by a temporary fastening system, the replaceable insert comprising two cutting edges extending from a rotational axis of the insert in opposing manners for double effective cutting and having an outer edge which extends beyond the axial body when mounted therewith; wherein in use, a drilling fluid is supplied to the area of the two cutting edges and exits though the duct with the opening positioned to receive drilling fluid from each of the two cutting edges.
2. The drilling head according to claim 1, the insert further comprising at least one cutting lip adjacent each of the two cutting edges which forms a predetermined chip of material.
3. The drilling head according to claim 2, where the size and shape of the chip produced may be controlled by altering the position, size andor configuration of the at least one cutting lip.
4. The drilling head according to claim 1, wherein the cutting lip has a cutting geometry having a positive rake angle.
5. The drilling head according to claim 1, the insert further comprising at least one cutting web positioned adjacent a self-centering point, with the at least one cutting web comprising one or more web cutting edges.
6. The drilling head of claim 5, where the at least one cutting web has a positive rake angle.
7. The drilling head according to claim 1, wherein the body has at least one bearing area, with a layer of material thereon to protect the bearing area in operation.
8. The drilling head according to claim 1, the body further comprising:
at least one channel along the outer surface of the body capable of directing fluid toward each of the two cutting edges of the insert.
9. The drilling head according to claim 1, further comprising cladding or wear pads positioned on opposing sides of the body.
10. The drilling head according to claim 1, the bore being a cross bore extending through the body to form openings on opposing sides of the body.
11. The drilling head according to claim 1, wherein the cutting edges provide an included angle between the cutting edges such that radial loads are minimized.
12. The drilling head according to claim 1, where the head is attachable to a single or double tube shank.
13. A drilling head for a tubular shank, the drilling head comprising:
a body comprising an outer surface, and a duct formed from an opening in the outer surface and exiting through a rear of the body; and a replaceable insert affixed to the body by a temporary fastening system, the replaceable insert comprising two cutting edges extending from a rotational axis of the insert in opposing manners for double effective cutting and the body having cladding or wear pads positioned on opposing sides of the body.
14. The drilling head according to claim 13, where the substrate material from which the cutting insert is made is variable.
15. The drilling head according to claim 13, where at least one coating usable in association with the insert are variable.
16. The drilling head according to claim 15, where the at least one coating is selected from the group consisting of diamond film, carbon vapor deposition (CVD) polycrystalline diamond film, titanium aluminum nitride or combinations thereof.
17. The drilling head according to claim 13, where the insert includes a self-centering point geometry provided by a combination of clearance features on the point of the insert between the two cutting edges.
18. A drilling head for a tubular shank, comprising a body having an outer surface, and a duct formed from an opening in the outer surface and exiting through a rear of the body; and a replaceable insert affixed to the body by a temporary fastening system, the replaceable insert comprising two cutting edges extending from a rotational axis of the insert in opposing manners for double effective cutting, and the body having at least one channel along the outer surface of the body capable of directing fluid toward each of the two cutting edges of the insert, and the fluid exiting through the duct.
19. The drilling head according to claim 18, where the at least one channel being approximately parallel to an axis of rotation of the head.
20. The drilling head according to claim 18, where the body has cladding or wear pads positioned on opposing sides of the body