1. A crank structure for a bicycle pedal, comprising:
a crank having a crank threaded hole;
a cylindrical sleeve disposed in the crank threaded hole;
two outer threads substantially in opposite rotary directions to each other, respectively disposed in a front section and a rear section of an outer periphery of said cylindrical sleeve, wherein the outer thread in the front section is in the same rotary direction as a rotary direction of the crank threaded hole, and outer thread in the rear section is in the opposite rotary direction to the rotary direction of the outer thread in the front section, and the rotary direction of an inner thread disposed in said cylindrical sleeve is the same as the rotary direction of a thread on a bolt protruding from the pedal;
two holes being disposed on respective opposite edges of said cylindrical sleeve and two holes being disposed on respective opposite edges of a nut of the pedal for letting a tool to pass through and rotate;
wherein after the outer thread in the front section of said cylindrical sleeve is locked into the thread of the crank threaded hole and the outer thread in the rear section is locked by the nut to limit the rotation, the bolt being locked into an inner thread in a hole of said cylindrical sleeve for the assembling, such that the outer threads at the front and rear sections of the outer periphery of said cylindrical sleeve are in opposite rotary directions with respect to each other and respectively limit a screw connection of the thread of said crank threaded hole and the nut in order to attain the effects of securely mounting and easily detaching the crank structure.
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 body for a nozzle arrangement for dispensing a fluid in the form of an aerosol, said body defining an inlet, an outlet and an internal passageway that connects said inlet to said outlet; said body comprising two parts configured to be assembled together to form at least part of the body, each of said parts having an abutment surface adapted to contact a corresponding abutment surface on the other of said parts when the parts are assembled, the parts having corresponding formations that co-operate to define between them the outlet and at least a portion of the internal passageway when the parts are assembled;
characterized in that a first of said parts comprises at least one filter projection extending towards a second of said parts, the second of said parts having at least one further filter formation that co-operates with the at least one filter projection to form a filter in the passageway when the parts are assembled.
2. A body for a nozzle arrangement claimed in claim 1, in which the corresponding formations that define the outlet and at least a portion of the internal passageway comprise at least one recess in one of said parts.
3. A body for a nozzle as claimed in claim 2, in which the at least one recess comprises a groove.
4. A body for a nozzle as claimed in claim 2, in which the corresponding formations that define the outlet and at least a portion of the internal passageway comprise at least one projection on the other of said parts, which projection is received in the at least one recess to define at least a portion of the internal passageway when the parts are assembled.
5. A nozzle as claimed in claim 4, in which the at least one projection comprises a ridge.
6. A body for a nozzle arrangement as claimed in claim 2, in which the corresponding formations that define the outlet and at least a portion of the internal passageway comprise at least one further recess in the other of said parts, the at least one further recess aligning with the at least one recess in said one of the parts to define the outlet and at least part of the internal passageway between them.
7. A body for a nozzle arrangement as claimed in claim 6, in which the at least one further recess comprises a groove.
8. A body for a nozzle arrangement as claimed in claim 6 wherein the at least one further filter formation on the second of said parts comprises a recess into which the projection extends.
9. A body for a nozzle arrangement as claimed in claim 8, in which said recess defines the inlet.
10. A body for a nozzle arrangement as claimed in claim 8, in which the first of said parts comprises a plurality of filter projections, each filter projection extending into a corresponding recess formed in the second of said parts when the parts are assembled.
11. A body for a nozzle arrangement as claimed in claim 1, in which the at least one further filter formation comprises at least one filter projection on the second of said parts configured to extend towards the first of said parts when the parts are assembled.
12. A body for a nozzle arrangement as claimed in claim 11, in which a plurality of filter projections are provided on each of said first and second parts.
13. A body for a nozzle arrangement as claimed in claim 12, in which said filter projections project from the corresponding formations that define at least a portion of the internal passageway so as to extend at least part way into the internal passageway when the parts are assembled.
14. A body for a nozzle arrangement as claimed in claim 12, in which the filter projections on each of said first and second parts extend beyond the abutment surface of their respective part.
15. A body for a nozzle arrangement as claimed in claim 14, in which the filter projections on the first and second parts are configured to overlap when the parts are assembled.
16. A body for a nozzle arrangement as claimed in claim 12, in which the filter projections are chosen from a group consisting of:
rods, posts, tubes, flaps, and plates.
17. A body for a nozzle arrangement as claimed in claim 12, in which the filter projections are posts.
18. A body for a nozzle arrangement as claimed in claim 17, in which the posts are tapered, narrowing from a base region to a tip region.
19. A body for a nozzle arrangement as claimed in claim 12 wherein the filter projections are plates.
20. A body for a nozzle arrangement as claimed in claim 19, in which the plates on the first and second parts are interleaved.
21. A body for a nozzle arrangement as claimed in claim 19 wherein the plates are configured to extend longitudinally of the passage when the parts are assembled.
22. A body for a nozzle assembly as claimed in claim 21, in which the plates are tapered so that when the parts are assembled, the gap between adjacent plates narrows from an upstream end of the filter to a down stream end of the filter.
23. A body as claimed in claim 20, in which the plates are configured so as to extend transversely across the passage when the parts are assembled.
24. A body as claimed in claim 23, in which the plates are configured so that the plates extend across the full width of the passage with a gap between a distal end of each plate and the opposing surface of the internal passageway.
25. A body as claimed in claim 24, in which the plates are configured such that the gaps between the distal ends of the plates and the opposing surface of the internal passageway get progressively smaller from an upstream end of the filter to a downstream end of the filter.
26. A body for a nozzle as claimed in claim 1, configured such that, in use, fluid is caused to spin within the internal passageway.
27. A body for a nozzle arrangement as claimed in claim 1 wherein the parts are configured so that when they are assembled, the filter is provided in a portion of the internal passageway that tapers, narrowing from an upstream end of the portion towards a downstream end of the portion.
28. A body for a nozzle arrangement as claimed in claim 1 wherein the two parts are moulded from plastic.
29. A body for a nozzle arrangement as claimed in claim 1 wherein the two parts define the whole of the body.
30. A body for a nozzle arrangement as claimed in claim 1 wherein the body forms an insert configured to be fitted into a nozzle arrangement.
31. A body for a nozzle arrangement as claimed in claim 1 wherein the body comprises the whole of the nozzle arrangement.
32. A body for a nozzle arrangement as claimed in claim 1 wherein said body being configured for use with fluids operating at a pressure of 20 bars or less and especially at a pressure in the range of 4 to 12 bars.
33. (canceled)
34. (canceled)
35. A body for a nozzle arrangement as claimed in claim 20 wherein the plates are configured to extend longitudinally of the passage when the parts are assembled.
36. A body for a nozzle arrangement as claimed in claim 12 configured such that, in use, fluid is caused to spin within the internal passageway.