What is claimed is:
1. A shock absorber comprising a smaller-diameter tube portion and a larger-diameter tube portion integrally formed by partially reducing or partially enlarging a plastically deformable straight tube, and a step portion that joins the smaller-diameter tube portion and the larger-diameter tube portion, wherein
both a folded-back portion of the smaller-diameter tube portion and a folded-back portion of the larger-diameter tube portion, as joining to each other through the step portion, have a circular arc-shaped section with an arcuate angle more than 90 degrees, and
the step portion is formed to have an S-shaped section by joining the folded-back portion of the smaller-diameter tube portion and the folded-back portion of the larger-diameter tube portion.
2. The shock absorber according to claim 1, wherein
the step portion is formed to have an S-shaped section, in which the radius of the circular arc-shaped section of the folded-back portion of the smaller-diameter tube portion is made smaller than that of the circular arc-shaped section of the folded-back portion of the larger-diameter tube portion.
3. The shock absorber according to claim 1, wherein
the step portion is formed to have an S-shaped section by joining the folded-back portion of the smaller-diameter tube portion and the folded-back portion of the larger-diameter tube portion through an annular side surface.
4. A shock absorber comprising a smaller-diameter tube portion and a larger-diameter tube portion integrally formed by partially reducing or partially enlarging a plastically deformable straight tube, and a step portion that joins the smaller-diameter tube portion and the larger-diameter tube portion, wherein
the smaller-diameter tube portion includes a guiding member fixed on its inner surface for retaining or preventing the inclination of the smaller-diameter tube portion when the smaller-diameter tube portion sinks into the larger-diameter tube portion,
the guiding member has a smaller-diameter annular guiding portion having an external diameter equal to the internal diameter of the smaller-diameter tube portion and a larger-diameter annular guiding portion having an external diameter equal to the internal diameter of the larger-diameter tube portion,
the smaller-diameter annular guiding portion is fixed on the inner surface of the smaller-diameter tube portion and protruding across the step portion from the smaller-diameter tube portion into the larger-diameter tube portion, and
the larger-diameter annular guiding portion contacts to the inner surface of the larger-diameter tube portion at a position where the smaller-diameter annular guiding portion crosses the step portion.
5. The shock absorber according to claim 4, wherein
the step portion is formed to have an S-shaped section, in which the radius of the circular arc-shaped section of the folded-back portion of the smaller-diameter tube portion is made smaller than that of the circular arc-shaped section of the folded-back portion of the larger-diameter tube portion.
6. The shock absorber according to claim 4, wherein
the step portion is formed to have an S-shaped section by joining the folded-back portion of the smaller-diameter tube portion and the folded-back portion of the larger-diameter tube portion through an annular side surface.
7. The shock absorber according to claim 4, wherein
the guiding member forms the larger-diameter annular guiding portion by partially enlarging the smaller-diameter annular guiding portion protruding from the smaller-diameter tube portion into the larger-diameter tube portion so much as to abut against the inner surface of the larger-diameter tube portion.
8. The shock absorber according to claim 4, wherein
the guiding member forms the larger-diameter annular guiding portion as an annular outward-curled edge portion by expanding the smaller-diameter annular guiding portion protruding from the smaller-diameter tube portion into the larger-diameter tube portion so much as to abut against the inner surface of the larger-diameter tube portion and by folding back the smaller-diameter annular guiding portion toward the smaller-diameter tube portion.
9. The shock absorber according to claim 4, wherein
the guiding member has a tubular ring portion formed in the larger-diameter annular guiding portion and contacting with the inner surface of the larger-diameter tube portion.
10. A shock absorber comprising a smaller-diameter tube portion and a larger-diameter tube portion integrally formed by partially reducing or partially enlarging a plastically deformable straight tube, and a step portion that joins the smaller-diameter tube portion and the larger-diameter tube portion, wherein
the smaller-diameter tube portion includes a guiding portion formed integrally for retaining or preventing the inclination of the smaller-diameter tube portion when the smaller-diameter tube portion sinks into the larger-diameter tube portion, and
the guiding portion is formed by expanding the folded-back portion of the smaller-diameter tube portion toward the inner surface of the larger-diameter tube portion.
11. The shock absorber according to claim 10, wherein
the step portion is formed to have an S-shaped section, in which the radius of the circular arc-shaped section of the folded-back portion of the smaller-diameter tube portion is made smaller than that of the circular arc-shaped section of the folded-back portion of the larger-diameter tube portion.
12. The shock absorber according to claim 10, wherein
the step portion is formed to have an S-shaped section by joining the folded-back portion of the smaller-diameter tube portion and the folded-back portion of the larger-diameter tube portion through an annular side surface.
13. The shock absorber according to claim 10, wherein
the guiding portion is formed by expanding the folded-back portion of the smaller-diameter tube portion, the folded-back portion is that the step portion is formed to have an S-shaped section, in which the radius of the circular arc-shaped section of the folded-back portion of the smaller-diameter tube portion is made smaller than that of the circular arc-shaped section of the folded-back portion of the larger-diameter tube portion.
14. The shock absorber according to claim 10, wherein
the guiding portion is formed by expanding the folded-back portion of the smaller-diameter tube portion, the folded-back portion is that the step portion is formed to have an S-shaped section by joining the folded-back portion of the smaller-diameter tube portion and the folded-back portion of the larger-diameter tube portion through an annular side surface.
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 radiating enclosure, comprising:
a dielectric housing having first and second detachable housing portion, each of said first and second housing portions having an inner surface and an outer surface, the dielectric housing capable of receiving a transceiver system when mouted in the dielectric housing;
at least one radiating element disposed on the exterior surface of said first housing portion;
a connection device to establish an electrical connection between said at least one radiating element and the transceiver systems; and
ground plane material distributed substantially on the entirety of the interior surface of said first housing portion, said ground plane material to be electrically coupled to the transceiver system.
2. The radiating enclosure of claim 1, wherein said ground plane material is configured to prevent lectromagnetic interference from substantially escaping said dielectric housing.
3. The radiating enclosure of claim 1, wherein said at least one radiating element is formed from a thin sheet of conductive material adhesively applied to the exterior surface of said first housing portion.
4. The radiating enclosure of claim 1, wherein said at least one radiating element is formed on the exterior surface of said first housing portion by an electro-deposition process.
5. The radiating enclosure of claim 1, wherein said at least one radiating element is printed on the exterior surface of said first housing portion.
6. The radiating enclosure of claim 1, further comprising a protective covering over said at least one radiating element.
7. The radiating enclosure of claim 1, wherein said dielectric housing is formed through an injection molding process.
8. The radiating enclosure of claim 1, wherein the dielectric housing is further capable of receiving a plurality of transceiver systems, said ground plane material to be electrically coupled to said plurality of transceiver systems.
9. The radiating enclosure of claim 1, wherein said dielectric housing is essentially in th shape of a rectangular box.
10. The radiating enclosure of claim 1, wherein said at a least one radiating element has an essentially planar shape.
11. The radiating enclosure of claim 1, wherein said at least one radiating element has a curved shape.
12. A radiating enclosure, comprising:
a dielectric housing having first and second detachable housing portions, each of said first and second housing portions having an inner surface and an outer surface, the dielectric housing capable of receiving a plurality of transceiver systems when mounted in the dielectric housing;
a plurality of radiating elements disposed on the exterior surface of said first housing portion;
a plurality of connection devices to establish a plurality of electrical connections between said plurality of radiating elements and the plurality of transceiver systems; and
ground plane material distributed substantially on the entirety of the interior surface of said housing portion, said ground plane material to be electrically coupled to the plurality of transceiver systems.
13. The radiating enclosure of claim 12, wherein said ground plane material is configured to prevent electromagnetic interference from substantially escaping said dielectric housing.
14. The radiating enclosure of claim 12, wherein each of said plurality of radiating elements is formed from a thin sheet of conductive material adhesively applied to the exterior surface of said first housing portion.
15. The radiating enclosure of claim 12, wherein each of said plurality of radiating elements is formed on the exterior surface of said first housing portion by an electro-deposition process.
16. The radiating enclosure of claim 12, wherein each of said plurality of radiating elements is printed on the exterior surface of said first housing portion.
17. The radiating enclosure of claim 12, further comprising a protective covering over said plurality of radiating elements.
18. The radiating enclosure of claim 12, wherein said dielectric housing is formed through an injection molding process.
19. The radiating enclosure of claim 12, wherein said dielectric housing is essentially in the shape of a rectangular box.
20. The radiating enclosure of claim 12, wherein each of said plurality of radiating elements has an essentially planar shape.
21. The radiating enclosure of claim 12, wherein each of said plurality of radiating elements has a curved shape.