1. A gas hot air gun comprising:
a main body including a barrel and a handle, with a heating chamber and a mixing chamber in said barrel, and a battery set and a gas can inside said handle, wherein the gas can contains burnable fluid;
an air blower installed internally on an end of said barrel and powered by the battery set;
an ignition device installed inside said barrel;
a nozzle installed inside said main body, wherein one end of said nozzle is connected to the gas can to spray gas; and
a switch set installed inside said main body, said switch set comprises a power switch and an ignition switch, wherein users press said power switch and have gas spray out from said nozzle into said mixing chamber to mix with air which then is sent to said heating chamber, said ignition switch has said ignition device ignite the mixed gas and air and generate a heat source, wherein said blower blows hot air inside said heating chamber out of the barrel, wherein a first and a second container are installed in said handle to hold the battery set in said first container and the gas can in said second container, wherein a movable cover is on a bottom of said handle to cover said first and said second container.
2. The gas hot air gun according to claim 1, wherein several intakes are installed on the end of said barrel for fresh air to come in.
3. The gas hot air gun according to claim 1, wherein a holder is installed on a front of said barrel for faster heating effect.
4. The gas hot air gun according to claim 1, wherein the gas can is a refill type can.
5. The gas hot air gun according to claim 1, wherein said switch set contains a regulation valve.
6. The gas hot air gun according to claim 1, wherein said switch set is installed on said handle of said main body.
7. The gas hot air gun according to claim 1, wherein said power switch connects to the battery set and said air blower with electrical wires, said power switch also has a control rod to open and close the gas can.
8. The gas hot air gun according to claim 1, wherein said ignition switch connects to said ignition device.
9. The gas hot air gun according to claim 5, wherein said regulation valve controls the gas flow amount of the gas can.
10. The gas hot air gun according to claim 1, wherein said heating chamber interlinks to said mixing chamber.
11. The gas hot air gun according to claim 1, wherein said heating chamber is installed on a front of said barrel, said mixing chamber is installed on said heating chamber near the end of said barrel.
12. The gas hot air gun according to claim 1, wherein a shrink is formed in said mixing chamber near said heating chamber, the diameter of said shrink is smaller on an end near said nozzle.
13. The gas hot air gun according to claim 1, wherein several air inhalation holes are around said mixing chamber for fresh air to come in to achieve better gas-air ratio.
14. The gas hot air gun according to claim 1, wherein a metal slice is inside said heating chamber with good heat exchange rate and heat conductivity to be heated up and cooled down rapidly, said metal slice also has an air flow direction regulation effect.
15. The gas hot air gun according to claim 1, wherein a catalyst is installed in said heating chamber to help the mixed gas burn completely and to reduce the generation of carbon monoxide to lift temperature and avoid flame coming out from said nozzle.
16. The gas hot air gun according to claim 14, wherein a burning chamber is installed on one end of said metal slice, said burning chamber interlinks to said mixing chamber.
17. A gas hot air gun comprising:
a main body including a barrel and a handle, with a heating chamber and a mixing chamber in said barrel, and a battery set and a gas can inside said handle, wherein the gas can contains burnable fluid;
an air blower installed internally on an end of said barrel and powered by the battery set;
an ignition device installed inside said barrel;
a nozzle installed inside said main body, wherein one end of said nozzle is connected to the gas can to spray gas; and
a switch set installed inside said main body, said switch set comprises a power switch and an ignition switch, wherein users press said power switch and have gas spray out from said nozzle into said mixing chamber to mix with air which then is sent to said heating chamber, said ignition switch has said ignition device ignite the mixed gas and air and generate a heat source, wherein said blower blows hot air inside said heating chamber out of the barrel, wherein a metal slice is inside said heating chamber with rood heat exchange rate and heat conductivity to be heated up and cooled down rapidly, said metal slice also has an air flow direction regulation effect, wherein a burning chamber is installed on one end of said metal slice, said burning chamber interlinks to said mixing chamber, wherein said ignition device is installed inside said burning chamber.
18. The gas hot air gun according to claim 1, wherein said air blower comprises a motor and a fan blade, said motor located near a front side of said barrel, wherein the fan blade is installed near the end of said barrel.
19. The gas hot air gun according to claim 18, wherein said air blower comprises a temperature sensor, wherein said temperature sensor is installed around said barrel near said heating chamber, said temperature sensor keeps said motor turning after said power switch is off, wherein when the temperature of said heating chamber goes below a certain temperature, said temperature sensor stops said motor from turning.
20. The gas hot air gun according to claim 1, wherein said nozzle is installed in said barrel of said main body between said blower and said mixing chamber.
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 drill bit (99) comprising:
a bit body (98) defining a rotational axis (93) and a bit face with a cone region (94), a shoulder region (95), and a gauge region (96);
a driving blade (10) formed on said bit body (98), said driving blade (10) extending from near said rotational axis across said bit face to at least said shoulder region;
first and second driven blades (30, 40) formed on said bit body (98); and
a plurality of primary cutters disposed along leading edges of said driving blade (10) and said first and second driven blades (30, 40); wherein
said primary cutters (12, 13) on said driving blade are characterized by having a unique radialelevational position with respect to all other primary cutters on said bit (99),
each of said primary cutters (31, 32, 33) on said first driven blade (30) are characterized by having a substantially redundant radialelevational position with one of said primary cutters (41, 42, 43) on said second driven blade (40), and
the remaining of said plurality of primary cutters (44, 45, 46) on said second driven blade (40) that do not have said redundant radialelevational position with one of said primary cutters (31, 32, 33) on said first driven blade (30) are characterized by having a unique radialelevational position with respect to all other primary cutters on said bit (99).
2. The drill bit (99) of claim 1 further comprising:
a third driven blade (20) formed on said bit body (98);
a plurality of primary cutters (21, 22) disposed along a leading edge of said third driven blade (20), each of said plurality of primary cutters (21, 22) on said third driven blade (20) characterized by having a unique radialelevational position with respect to all other primary cutters on said bit (99).
3. The drill bit (99) of claim 1 further comprising:
a plurality of driven blades (20, 50, 60) formed on said bit body in addition to said first and second driven blades (30, 40);
a plurality of primary cutters (21, 22, 52, 63) disposed along leading edges of said plurality of driven blades (20, 50, 60), each of said plurality of primary cutters on said plurality of driven blades characterized by having a unique radialelevational position with respect to all other primary cutters on said bit (99).
4. The drill bit (99) of claim 1 wherein:
said first driven blade (30) is disposed predominantly in said shoulder region of said bit face.
5. A drill bit (99) comprising:
a bit body (98);
a plurality of blades formed on said bit body (10, 20, 30, 40, 50, 60), each of said plurality of blades defining a leading edge;
a plurality of shoulder-region primary cutters distributed on said leading edges of said plurality of blades in a shoulder region (95) of said bit (99);
a first blade (30) of said plurality of blades including a first (31) of said plurality of shoulder-region primary cutters that is characterized by a substantially redundant radialelevational position with a second (41) of said plurality of shoulder-region primary cutters disposed on a second blade (40) of said plurality of blades.
6. The drill bit (99) of claim 5 further comprising:
a first group (31, 32, 33) of said plurality of shoulder-region primary cutters disposed on said first blade that are characterized by substantially redundant radialelevational positions with a second group (41, 42, 43) of said plurality of shoulder-region primary cutters that are disposed on said second blade (40).
7. The drill bit (99) of claim 6 wherein:
all of said plurality of shoulder-region primary cutters that are not in said first group (31, 32, 33) or said second group (41, 42, 43) are characterized by unique radialelevational positions.
8. The drill bit (99) of claim 6 wherein:
all of said plurality of shoulder-region primary cutters that are disposed on said first blade (30) are members of said first group (31, 32, 33) having redundant radialelevational positions with said second group (41, 42, 43) on said second blade (40).
9. The drill bit (99) of claim 5 wherein:
said first blade (30) is adjacent to said second blade (40).
10. The drill bit of claim 5 further comprising:
a third blade of said plurality of blades including a third of said plurality of shoulder-region primary cutters that is characterized by substantially redundant radialelevational positions with a fourth of said plurality of shoulder-region primary cutters disposed on a fourth blade of said plurality of blades.
11. A method for manufacturing a drill bit (99) having improved stability comprising the steps of:
forming a bit body (98) having at least first, second, and third blades (10, 30, 40) and a plurality of shoulder-region primary cutters disposed on said first, second, and third blades (10, 30, 40) in a shoulder region (95) of said bit (99); and
disposing a first one (31) of said plurality of primary cutters on said second blade (30) at the same radialelevational positions as a second one (41) of said plurality of primary cutters in a shoulder region of said third blade (40).
12. The method of claim 11 further comprising the step of:
disposing a first group (31, 32, 33) of said plurality of shoulder-region primary cutters on said first blade at substantially redundant radialelevational positions with a second group (41, 42, 43) of said plurality of shoulder-region primary cutters that are disposed on said second blade (40).
13. The method of claim 12 further comprising the step of:
disposing all other of said plurality of shoulder-region primary cutters that are not in said first or second groups at unique radialelevational positions on said drill bit (99).
14. The method of claim 11 wherein:
all of the primary cutters on said second blade (30) are in said first group and are plural set at redundant radialelevational positions.
15. The method of claim 11 further comprising the step of:
forming said second blade (30) so that it substantially does not lie within a cone region of said bit (99).
16. The method of claim 11 wherein:
said second blade (30) is disposed adjacent to said third blade (40).
17. The method of claim 11 further comprising the steps of:
disposing a third of said plurality of shoulder-region primary cutters on said first blade so that is characterized by substantially redundant radialelevational positions with a fourth of said plurality of shoulder-region primary cutters disposed on said second blade of said plurality of blades.
18. In a method for manufacturing an improved drill bit having substantially the characteristics of single-set drill bit (199) of a number n blades (110, 120, 130, 140, 150) formed on a bit body (198) with a plurality of primary cutters disposed on each of said n blades, wherein each of said plurality of primary cutters is located at a unique radialelevational position on said bit (199), said single-set drill bit (198) defining a particular single-set revolved profile (197), the improvement providing enhanced stability and comprising the steps of:
forming a drill bit (99) of n+1 blades (10, 20, 30, 40, 50, 60) on a bit body (98), wherein n of said n+1 blades (10, 20, 40, 50, 60) define a hybrid revolved profile (97) substantially identical to said particular single-set revolved profile (197); and
disposing a plural-set primary cutter (31) on said (n+1)th blade (30) so as to have a redundant radialelevational position with one (41) of said plurality of primary cutters.
19. The method of claim 18 further comprising the steps of:
disposing a plurality of plural-set primary cutters (31, 32, 33) on said n+1th blade (40) so that at least one of said plurality of plural-set primary cutters within a shoulder region (95) of the bit (99) has a redundant radialelevational position with another of said plurality of primary cutters.
20. The method of claim 18 further comprising the steps of:
disposing a plurality of plural-set primary cutters (31, 32, 33) on said n+1th blade (40) so that each of said plurality of plural-set primary cutters has a redundant radialelevational position with one of said plurality of primary cutters (41, 42, 43).
21. The method of claim 18 further comprising the steps of:
forming said n+1th blade (30) so that it substantially does not lie within a cone region of said bit (99).