1. A microplate shaker comprising:
a base;
a drive means mounted within said base;
a microplate support tray operatively attached to said mechanical drive means so as to translate in both a horizontal and a vertical direction in response to actuation of said drive means, and configured to hold at least one microplate thereon; and
biasing members operatively attached to said microplate support tray, said biasing members biasing said microplate support tray to an at-rest position.
2. The microplate shaker of claim 1, wherein said drive means further comprises an electromagnetic drive unit mounted within said base so as to generate a vibrational force in a direction that is at a positive angle to said horizontal tray.
3. The microplate shaker of claim 1, said microplate support tray further comprising:
a generally horizontal tray having at least one indentation configured to receive at least one microplate.
4. The microplate shaker of claim 3, said invention being defined by shallow rectangular well having dimensions generally corresponding to a bottom face of a microplate.
5. The microplate shaker of claim 3, said microplate support tray further comprising means for preventing movement of said at least one microplate with respect to said microplate tray.
6. The microplate shaker of claim 5, said means for preventing movement of said at least one microplate further comprising a clamp configured for holding a portion of a bottom face of said microplate against said at least one indentation.
7. The microplate shaker of claim 5, said means for preventing movement of said microplate further comprising an elongate member positioned overtop said at least one microplate, said elongate member being biased by a resilient member towards said horizontal tray.
8. The microplate shaker of claim 7, said microplate support tray further comprising a plurality of vertical members positioned adjacent said at least one indentation so as to prevent sideways movement of said at least one microplate.
9. A microplate shaker comprising:
a microplate support tray;
means for directing a vibration to said microplate support tray; and
biasing means biasing said microplate support tray to an at-rest position.
10. The microplate shaker of claim 9, said means for directing a vibration being configured to direct a non-horizontal vibration to said microplate support tray.
11. The microplate shaker of claim 9, said means for directing a vibration further comprising:
an electromagnetic drive unit; and
a bracket affixed to said electromagnetic drive unit so as to receive a non-horizontal vibration generated therefrom, and affixed to said microplate support tray for translating said non-horizontal vibration thereto.
12. The microplate shaker of claim 11, said biasing means further comprising a plurality of resilient members biasing said bracket and said microplate support tray to an at-rest position.
13. The microplate shaker of claim 12, wherein said plurality of resilient members comprise leaf springs.
14. The microplate shaker of claim 13, wherein said leaf springs are mounted in an angled position so as to provide bias against movement of said bracket in a direction having both horizontal and vertical components.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
That which is claimed is:
1. A stop-leak composition for the cooling system of an internal combustion engine and the like, consisting essentially of a powder comprising from 25 to 100 weight percent of ground wood, any balance comprising ginger rhizome powder, said powder being mixed with ground nutshells.
2. The composition of claim 1 in which said ginger rhizome powder is essentially absent.
3. The composition of claim 2 in which said ground wood is hardwood.
4. The composition of claim 3, enclosed in a water soluble plastic film package.
5. The composition of claim 1 in which said ground wood is hardwood.
6. The composition of claim 1 in which said ground woodginger rhizome powder is present in an amount of 40 to 95 weight percent, and said ground nutshells are present in an amount of 5 to 60 weight percent.
7. The composition of claim 6 in which said ground wood is hardwood.
8. The composition of claim 7 in which said ginger rhizome powder is essentially absent.
9. The composition of claim 7 in which the powders present are of a particle size capable of passing a 30 mesh screen but not a 180 mesh screen.
10. The composition of claim 1 in which the powders present are of a particle size capable of passing a 30 mesh screen but not a 180 mesh screen.
11. The composition of claim 1, enclosed in a water soluble plastic film package.
12. The packaged composition of claim 11 in which said water soluble plastic film package comprises polyvinyl alcohol.
13. The packaged composition of claim 12 in which said ginger rhizome is essentially absent.
14. The composition of claim 13 in which said ground wood is hardwood.
15. The composition of claim 14 in which said ground nutshells are present in an amount of 5 to 60 weight percent.
16. The composition of claim 10 in which said ground wood is maple.
17. A stop-leak composition for the cooling of an internal combustion engine and the like, consisting essentially of 5 to 30 weight percent of powdered purified cellulose; 25 to 60 weight percent of ground nutshells; and 30 to 70 weight percent of a ginger rhizome powder.
18. The composition of claim 17 which is in the form of a solid tablet.
19. The composition of claim 18 in which the ground nut shells and ginger rhizome powder are of a particle size capable of passing a 30 mesh screen but not a 180 mesh screen.
20. A stop-leak composition in tablet form for the cooling of an internal combustion engine and the like, said tablet consisting essentially of a mixture of purified powdered cellulose, ground nutshells, and ginger rhizome powder.
21. The tablet of claim 20 having a weight of 5 to 20 grams.
22. The composition of claim 20 in which the ground nut shells and ginger rhizome powder are of a particle size capable of passing a 30 mesh screen but not a 180 mesh screen.
23. A stop-leak composition for the cooling of an internal combustion engine and the like, said composition consisting essentially of a powdered mixture of (1) ground nutshells and (2) ginger rhizome powder andor powdered wood, said mixture being sealed within a water soluble film package.
24. A stop-leak composition for the cooling of an internal combustion engine and the like, said composition comprising: (1) from 40 to 95 weight percent of a cellulosic powder comprising from 25 to 100 weight percent of ground wood or purified cellulose powder, any balance of the powder substantially comprising ginger rhizome powder, and (2) ground nut shells present in an amount of about 5 to 60 weight percent, based on the entire composition.
25. The composition of claim 25, having a particle size range between about 30 mesh and 180 mesh.
26. The stop-leak composition of claim 24 in which said cellulosic powder comprises at least 40 weight percent of purified cellulose powder and no more than 60 weight percent ginger rhizome powder.
27. The stop-leak composition of claim 24 which is in the form of a solid tablet having a weight of substantially 5 to 15 grams.