1. A fuel injector for an internal-combustion engine comprising
a hollow body;
a metering valve housed within the hollow body and having a calibrated pipe for outlet of fuel from a control chamber;
a shutter, controlled by an electromagnet, for keeping the calibrated pipe normally closed, the electromagnet comprising a magnetic core having an annular slot;
an electric coil carried by a bobbin, housed in the annular slot, and comprising a substantially cylindrical outer surface, said bobbin having a C-shaped section defined by a substantially cylindrical rib interposed between two flanges substantially planar and parallel to one another;
a pair of a appendages mounted on one of said bobbin flanges each appendage supporting a first end of one of a pair of plugs for connection to an electrical supply; said appendages inserted into two corresponding holes in said magnetic core and defining corresponding gaps between the holes and the appendages; and
a block of non-magnetic material englobing said magnetic core and at least a portion of said plugs, said block comprising a pair of bushings that fit within said corresponding gaps to englobe at least a portion of said appendages projecting from said holes;
wherein said block and said annular slot define a space that permits fuel exiting the control chamber to contact the outer surface of said electrical coil.
2. The injector of claim 1, wherein one of said flanges has a smaller diameter than the other flange on which said appendages are mounted, forming an annular passage for said outflowing fuel.
3. The injector of claim 1, wherein at least one of said flanges has at least two perimetral recesses that form corresponding passages for said outflowing fuel.
4. The injector of claim 2, wherein said core and said block have corresponding central slots in communication with said space for discharging fuel coming out of said calibrated pipe.
5. The injector of claim 3, wherein said core and said block are formed with corresponding central slots in communication with said space for discharging fuel coming out of said calibrated pipe.
6. The injector of claim 1, wherein each of said appendages has an outer surface adhered to a surface of said corresponding hole so that said block englobes only said part of said appendages.
7. The injector of claim 4, wherein each of said appendages has an outer surface adhered to a surface of said corresponding hole, so that said block englobes only said part of said appendages.
8. The injector of claim 1, wherein said block comprises two parallel cylindrical cavities, each cavity positioned to correspond to a second end portion of one of the plugs, each of said plugs has having a respective seal set between said second end portion and the corresponding parallel cavity of said block.
9. The injector of claim 6, wherein said block comprises two parallel cylindrical cavities, each cavity positioned to correspond to a second end portion of one of the plugs, each of said plugs having a respective seal set between said second end portion and the corresponding parallel cavity of said block.
10. The injector of claim 7, wherein said block comprises two parallel cylindrical cavities, each cavity positioned to correspond to a second end portion of one of the plugs, each of said plugs having a respective seal set between said second end portion and the corresponding parallel cavity of said block.
11. The injector of claim 1, wherein said block is connected to said hollow body by a ring nut screwed on said hollow body, and a compression spring is configured between said ring nut and said hollow body.
12. The injector of claim 2, wherein said block is connected to said hollow body by a ring nut screwed on said hollow body, and a compression spring is configured between said ring nut and said hollow body.
13. The injector of claim 3, wherein said block is connected to said hollow body by a ring nut screwed on said hollow body, and a compression spring is configured between said ring nut and said hollow body.
14. The injector of claim 4, wherein said block is connected to said hollow body by a ring nut screwed on said hollow body, and a compression spring is configured between said ring nut and said hollow body.
15. The injector of claim 5, wherein said block is connected to said hollow body by a ring nut screwed on said hollow body, and a compression spring is configured between said ring nut and said hollow body.
16. The injector of claim 6, wherein said block is connected to said hollow body by a ring nut screwed on said hollow body, and a compression spring is configured between said ring nut and said hollow body.
17. The injector of claim 7, wherein said block is connected to said hollow body by a ring nut screwed on said hollow body, and a compression spring is configured between said ring nut and said hollow body.
18. The injector of claim 8, wherein said block is connected to said hollow body by a ring nut screwed on said hollow body, and a compression spring is configured between said ring nut and said hollow body.
19. The injector of claim 9, wherein said block is connected to said hollow body by a ring nut screwed on said hollow body, and a compression spring is configured between said ring nut and said hollow body.
20. The injector of claim 10, wherein said block is connected to said hollow body by a ring nut screwed on said hollow body, and a compression spring is configured between said ring nut and said hollow body.
21. The injector of claim 5, wherein each of said appendages has an outer surface adhered to a surface of said corresponding hole, so that said block englobes only said part of said appendages.
22. The injector of claim 21, wherein said block comprises two parallel cylindrical cavities, each cavity positioned to correspond to a second end portion of one of the plugs, each of said plugs having a respective seal set between said second end portion and the corresponding parallel cavity of said block.
23. The injector of claim 21, wherein said block is connected to said hollow body by a ring nut screwed on said hollow body, and a compression spring is configured between said ring nut and said hollow body.
24. The injector according to claim 22, wherein said block is connected to said hollow body by a ring nut screwed on said hollow body, and a compression spring is configured between said ring nut and said hollow body.
25. The injector of claim 2, wherein each of said appendages has an outer surface adhered to a surface of said corresponding hole, so that said block englobes only said part of said appendages.
26. The injector of claim 3, wherein each of said appendages has an outer surface adhered to a surface of said corresponding hole, so that said block englobes only said part of said appendages.
27. The injector of claim 2, wherein said block comprises two parallel cylindrical cavities, each cavity positioned to correspond to a second end portion of one of the corresponding plugs, each of said plugs having a respective seal set between said second end portion and the corresponding parallel cavity of said block.
28. The injector of claim 3, wherein said block comprises two parallel cylindrical cavities, each cavity positioned to correspond to a second end portion of one of the corresponding plugs, each of said plugs having a respective seal set between said second end portion and the corresponding parallel cavity of said block.
29. The injector of claim 25, wherein said block comprises two parallel cylindrical cavities, each cavity positioned to correspond to a second end portion of one of the corresponding plugs, each of said plugs having a respective seal set between said second end portion and the corresponding parallel cavity of said block.
30. The injector of claim 26, wherein said block comprises two parallel cylindrical cavities, each cavity positioned to correspond to a second end portion of one of the corresponding plugs, each of said plugs having a respective seal set between said second end portion and the corresponding parallel cavity of said block.
31. A method for manufacture of a fuel injector of claim 1, the method comprising the steps of:
(a) providing the bobbin for said coil;
(b) winding said coil on said bobbin and inserting a first end portion of one of said plugs into each of said appendages;
(c) inserting said bobbin into said core with said coil and said plugs;
(d) providing a mold to form said block of non-magnetic material;
(e) inserting said core into said mold with said bobbin and said plugs;
(f) injecting a non-magnetic plastic material into said mold; and
(g) separating said block thus formed from said core and from said mold.
32. A method for manufacture of a fuel injector for an internal-combustion engine, having a hollow body in which an electromagnet is housed for controlling a metering valve for the injection, the electromagnet comprising a magnetic core, an electric coil and two plugs electrically connected to said coil, said core having an annular slot for housing said coil, and two holes for the passage of said plugs, the method comprising the steps of:
(a) providing a bobbin for said coil having a C-shaped section, said bobbin having two appendages, each designed to receive a first end portion of the corresponding plug;
(b) winding said coil on said bobbin and inserting the first end portion of the corresponding plug into each appendage;
(c) inserting said bobbin into said core with said coil and said plugs;
(d) providing a mould to form a block of non-magnetic material to englobe at least part of said core, said appendages of the bobbin, and said plugs;
(e) providing said core in said mould with said bobbin said plugs;
(f) providing a core in said mould to form a gap between an outer surface of said coil and said annular slot;
(g) injecting a non-magnetic plastic material into said mould; and
(h) separating said block thus formed from said core and from said mould.
33. The method of claim 32, wherein the method further comprises the steps of:
(i) coupling said block with a compression spring;
(j) inserting said coupled block into a tubular stretch of said hollow body; and
(k) locking said block and said compression spring in said tubular stretch with a ring nut.
34. A fuel injector for an internal-combustion engine, the fuel injector comprising:
a hollow body;
an electromagnet housed in the hollow body for controlling a metering valve, the electromagnet comprising a magnetic core, an electric coil wound on a bobbin, and two plugs electrically connected to said coil, said core having an annular slot for housing said coil and two holes for receiving said plugs, the bobbin having a C-shaped section and two appendages, each appendage supporting a first end portion of one of said two plugs;
said bobbin, said coil, and said plugs inserted within said core, defining a gap between an outer surface of said coil and said annular slot in said core; and
a block of non-magnetic, plastic material englobing at least a portion of said core, said bobbin appendages, and said plugs.
35. The fuel injector of claim 34 further comprising said block housed within a tubular stretch of said hollow body, a compression spring coupled to said block, and a ring nut locking said block and said compression spring in said tubular stretch.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A sealed package comprising;
a container having a body defining a mouth and having a flange around said mouth; and
a lid disposed on said container across said mouth and flange, said flange having an annular, upset first bead of a heat-sealable thermoplastic material, said lid having an annular second bead of a heat-sealable thermoplastic material adjacent said first bead, said first and second beads being sealed together with a first heat seal comprising a resolidification of a melted interface portion of said first and second beads.
2. A sealed package in accordance with claim 1, wherein:
said flange has an annular, upset third board of a heat-sealable thermoplastic material;
said lid has an annular fourth bead of a heat sealable thermoplastic material adjacent said third bead; and
said package includes a second heat seal comprising a resolidification of a melted interface portion of said third and fourth beads.
3. A sealed package in accordance with claim 2, wherein said first and third beads are spaced apart and are located between said second and fourth beads.
4. A sealed package in accordance with claim 2, wherein said lid is sealed to said flange outwardly of said lid fourth bead in a substantially annular configuration extending from said fourth bead to an outer edge of said flange.
5. A sealed package in accordance with claim 2, wherein said flange is deformed between said first and third beads to define a recess receiving a downwardly projecting portion of said lid.
6. A sealed package in accordance with claim 2, wherein said lid defining an upwardly projecting portion above said second bead and an upwardly projecting portion above said fourth bead.
7. A sealed package in accordance with claim 6, wherein said lid is deformed between said upwardly projecting portions of said lid to define an annular recess on an exterior of said lid.
8. A sealed package in accordance with claim 2, wherein said lid comprises a heat sealable material, and wherein said second and third beads are formed from a lateral displacement of said heat sealable material.
9. A container formed from a sheet material, said container comprising a unitary structure of said sheet material, said container further comprising:
peripheral flange defining an opening;
a downwardly and inwardly tapering hollow body defined around a longitudinal axis by a generally annular sidewall extending downwardly from said flange;
a bottom wall comprising: (1) an annular, curved, peripheral base extending from a lower end of said body sidewall, said base constructed to engage a flat support surface along a generally circular line of contact; (2) an annular first end wall extending from said annular curved, peripheral base both inwardly and toward said opening defined by said flange; (3) an annular second end wall located closer to said opening than said first end wall and extending from said first end wall both inwardly and toward said opening defined by said flange; and (4) a central, third end wall located closer to said opening defined by said flange than said second end wall and extending from said second end wall.
10. A container in accordance with claim 9, wherein said first end wall defines a substantially frustoconical exterior surface.
11. A container in accordance with claim 9, wherein a thickness of said sidewall increases with increasing distance from said flange toward said base.
12. A container in accordance with claim 9, wherein said sidewall tapers at an angle of between about 1.8 degrees and about 3.2 degrees relative to said longitudinal axis.
13. A container in accordance with claim 9, wherein said sheet material comprises:
a plurality of layers of material co-extruded together to form a multi-ply sheet comprising first, second, third, fourth, and fifth layers, said sheet first layer adapted for functioning as an exterior side of the container and comprising polypropylene, said second layer functioning as an adhesive joining said first and third layers, said third layer functioning as an oxygen barrier and comprising ethylene vinyl alcohol, said fourth layer functioning as an adhesive joining said third and fifth layers, and said fifth layer adapted for functioning as an interior side of the container and comprising polypropylene.
14. A container in accordance with claim 9, wherein said second end wall defines an angle of about 45 degrees relative to said longitudinal axis.
15. A container formed from a sheet material, said container comprising a unitary structure of said sheet material, said container further comprising:
a peripheral flange defining an opening;
a downwardly and inwardly tapering hollow body defined around a longitudinal axis by a generally frustoconical annular sidewall extending downwardly from said flange;
a bottom which includes an annular, curved, peripheral base extending from a lower end of said body sidewall, said sidewall increasing in thickness with increasing distance from said opening.
16. A container in accordance with claim 15, wherein said sidewall defines a generally frustoconical exterior surface defining an angle between about 1.8 degrees and about 3.2 degrees relative to said longitudinal axis.
17. A container in accordance with claim 15, wherein said sheet material comprises:
a plurality of layers of material co-extruded together to form a multi-ply sheet comprising first, second, third, fourth, and fifth layers, said sheet first layer adapted for functioning as an exterior side of the container and comprising polypropylene, said second layer functioning as an adhesive joining said first and third layers, said third layer functioning as an oxygen barrier and comprising ethylene vinyl alcohol, said fourth layer functioning as an adhesive joining said third and fifth layers, and said fifth layer adapted for functioning as an interior side of the container and comprising polypropylene.
18. A container formed from a thermoplastic sheet material, said container comprising a unitary structure of said sheet material, said container further comprising:
a peripheral flange defining an opening;
a downwardly and inwardly tapering hollow body defined around a longitudinal axis by a sidewall extending downwardly from said flange; and
a bottom defined by (1) an annular, peripheral base extending from a lower end of said body sidewall, and (2) an end wall structure that extends radially inwardly from said peripheral base and that is located closer to said opening than is said peripheral base.
19. A container in accordance with claim 18, wherein said first end wall defines a substantially frustoconical exterior surface.
20. A container in accordance with claim 18, wherein said sidewall defines a generally frustoconical exterior surface defining an angle between about 1.8 degrees and about 3.2 degrees relative to said longitudinal axis.