1. An apparatus comprising:
a frame;
a seat back; and
a mounting system securing the seat back to the frame, the mounting system comprising:
a mounting member including a base and an extension projecting from the base along an axis in absence of external forces to the extension, the extension having an end distant from the base that is connected to the seat back and that is resiliently linearly movable in directions substantially perpendicular to the axis 360\xb0 about the axis.
2. The apparatus of claim 1, wherein the end of the extension is arcuately movable about the axis.
3. The apparatus of claim 1, wherein at least one of the base and the extension is resiliently flexible.
4. The apparatus of claim 2, wherein at least one of the base and the extension is resiliently flexible by a value of 300-900 in-lbrad, the torque (bending moment) per degree radian (angular deflection).
5. The apparatus of claim 2, wherein the base is resiliently flexible.
6. The apparatus of claim 5, wherein the base includes a resiliently flexible cup portion and wherein the extension extends from a center of the cup portion.
7. The apparatus of claim 6, wherein the extension extends from a concave side of the cup portion.
8. The apparatus of claim 6, wherein the mounting member includes a rim extending from and about the cup portion, the rim facing and abutting the seat back.
9. The apparatus of claim 5, wherein the base comprises:
an outer support; and
at least three resiliently flexible spokes between the outer support and the extension.
10. The apparatus of claim 2, wherein the base and the extension are integrally formed as a single unitary body.
11. The apparatus of claim 1, wherein the base is sandwiched between a first compliant member and a second compliant member.
12. The apparatus of claim 11, wherein the seat back includes a cavity receiving the base, the first compliant member and the second compliant member, wherein the extension projects beyond the cavity.
13. The apparatus of claim 1 further comprising:
one or more feet configured to stationarily support the frame relative to a floor; and
foot pedals supported by the frame and configured receive force from a person’s feet, the foot pedals receiving force having a component in a direction substantially parallel to the axis.
14. The apparatus of claim 1, wherein the apparatus comprises a stationary recumbent bicycle.
15. The apparatus of claim 1, wherein the mounting system further comprises at least four mounting members including the mounting member joining the seat back to the frame.
16. A mounting member comprising:
a base; and
an extension projecting from the base along an axis in absence of external forces to the extension, the extension having an end distant from the base that is connected to the seat back and that is resiliently linearly movable in directions substantially perpendicular to the axis 360\xb0 about the axis.
17. The apparatus of claim 16, wherein the end of the extension is arcuately movable about the axis.
18. The apparatus of claim 16, wherein at least one of the base and the extension is resiliently flexible.
19. The apparatus of claim 18, wherein at least one of the base and the extension is resilient flexible by a value of 250-450 in-lbrad, the torque (bending moment) per degree radian (angular deflection).
20. The apparatus of claim 18, wherein the base is resiliently flexible.
21. The apparatus of claim 20, wherein the base includes a resiliently flexible cup portion and wherein the extension extends from a center of the cup portion.
22. The apparatus of claim 21, wherein the extension extends from a concave side of the cup portion
23. The apparatus of claim 22, wherein the base and the extension are integrally formed as a single unitary body from one or more polymers.
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 process for sulfur oxide abatement comprising:
contacting a gas containing sulfur oxide at an elevated process temperature that is sufficient to enable sulfur oxides to be sorbed from said gas with a sufficient amount of solid sorbent material to remove sulfur oxide from the gas;
wherein said solid sorbent material comprises at least one layered phyllosilicate having alternating silicate and brucite layers and comprising about 10-30 weight percent magnesium oxide.
2. The process of claim 1 wherein the gas includes a vapor phase derived from a process comprising oxidative regeneration of deactivated cracking catalyst; comprising:
forming sulfur dioxide during said oxidative regeneration,
converting said sulfur dioxide to sulfur trioxide by contacting said gas at elevated temperature with solid sorbent material having sulfur oxide sorption ability and having an oxidation catalyst comprising at least one metal disposed thereon that is adapted to catalyze the conversion of said sulfur dioxide to sulfur trioxide.
3. The process of claim 2 wherein the solid sorbent material is regenerated by desorbing sulfur values therefrom and recycled, whereby the amount of sulfur oxide sorbed in said recycle operation is increased as compared to the amount of sulfur oxide sorbed in a first pass of said gas in contact with said solid sorbent material having said oxidation catalyst disposed thereon.
4. A sorbent composition comprising a mixture of about 10 to 90 parts by weight of magnesia-rich chlorite comprising about 10-30 weight percent MgO; and, correspondingly, about 90 to 10 parts by weight of hydrotalcite containing at least about 50 weight percent MgO; wherein at least said chlorite has previously been subjected to sorption of sulfur oxides from a gas and to desorption of sorbed sulfur oxides from said chlorite.
5. In a process of sulfur oxide sorption wherein a gas containing sulfur oxide is contacted at an elevated process temperature with a solid sorbent material to remove sulfur oxide from the gas, the improvement which comprises:
contacting said solid sorbent material comprising at least one magnesia-rich crystalline material having a layered structure comprising layers of brucite, wherein the brucite-containing sorbent material is predominately magnesia, with said gas under sorption conditions;
subjecting said solid sorbent material to desorption of sulfur values; and
recycling said desorbed solid sorbent material to further sorption of sulfur oxides from said gas.
6. The process of claim 5 wherein the solid sorbent material comprises a mixture of magnesia-rich chlorite and hydrotalcite in a weight ratio of about 10:90 to 90:10 chlorite:hydrotalcite.
7. In a process of sulfur oxide sorption from a gas containing at least one sulfur oxide, wherein said gas is contacted, at an elevated process temperature, with a sorbent material under conditions sufficient to remove sulfur oxide from the gas, the improvement that comprises:
effectively contacting said gas with a solid crystalline sorbent material comprising at least one crystalline material comprising layers of brucite structure comprising about 10 to 30 weight percent magnesia under conditions adapted for the sorption of sulfur oxide from said gas; and
where said sorbent material comprises a chlorite layered structure, said chlorite has been subjected to conditions under which:
a sulfur oxide is sorbed from a gas containing sulfur oxide onto said chlorite layered structure; and
sulfur values have been desorbed from said chlorite prior to the instant sorption of sulfur oxide from said gas.
8. The process of claim 7 wherein the amount of sulfur oxide removed from said gas in a second sorption step is greater than the amount of sulfur values sorbed from said gas in a first sorption step.
9. The process of claim 7 wherein the sorbent material further comprises a hydrotalcite.
10. The process of claim 7 wherein said solid crystalline sorbent material has deposited thereon an effective amount of oxidative catalyst comprising at least one metal.
11. The process of claim 7 wherein said solid crystalline sorbent material further comprises at least one metal oxide selected from the group consisting of cerium oxide and vanadium pentoxide.
12. The process of claim 7 wherein said sorbent material consists essentially of amesite.
13. The process of claim 7 wherein said solid crystalline sorbent material consists essentially of at least one chlorite comprising about 14 to 29 wt % magnesia.
14. In a process for cracking a heavy hydrocarbon feed stock containing sulfur compounds, at a process temperature in the range of about 700\xb0 to 820\xb0 C. and in the presence of a cracking catalyst, to produce a product comprising a gas phase comprising at least one sulfur oxide, wherein the process comprises contacting at least a portion of said gas phase under said process conditions with a sufficient quantity of a solid comprising at least one sulfur oxide sorbent material, to sorb sulfur oxide from said gas;
the improvement comprising:
contacting said gas with a sulfur oxide sorbent material comprising at least one magnesia-rich layered phyllosilicate having alternating silicate and brucite layers in a first pass;
desorbing sulfur values from said sorbent material; and
in a second pass, recycling said desorbed phyllosilicate layered sorbent material in combination with hydrotalcite into effective sorption contact with additional quantities of said sulfur oxide-containing gas, thereby sorbing more sulfur oxide from said gas in said second pass than in said first pass.
15. The process of claim 14 wherein said phyllosilicate contains about 10-30 weight percent magnesium oxide.
16. The process of claim 14 wherein said phyllosilicate consists essentially of amesite.
17. The process of claim 14 wherein said sulfur oxide sorbent material contains hydrotalcite consisting predominately of magnesia.