All The Claims

1. A method of vacuum cleaning, the method comprising:
providing a vacuum cleaner device comprising a main body, a first member releasably secured to the main body, a second member releasably secured to the main body, and a suction hose connected to the main body, wherein the main body comprises a first suction source, wherein the first member comprises a first housing and a dust container defined by or enclosed in the first housing, wherein the dust container is in fluid communication with the first suction source, wherein the second member comprises a second housing and a second suction source enclosed in the second housing, wherein the dust container is not in fluid communication with the second suction source, wherein the suction hose is in fluid communication with the dust container of the first member; and
running the first suction source so as to create a negative pressure in the dust container and in the suction hose, thereby cleaning a surface.
2. The method of claim 1, further comprising:
releasing the first member from the main body;
releasing the second member from the main body; and
engaging the first housing and the second housing to assemble a handheld vacuum cleaner such that the dust container and the second suction source are in fluid communication.
3. The method of claim 2, wherein the handheld vacuum cleaner comprises an air intake tube in fluid communication with the dust container, wherein the method further comprises running the second suction source so as to create airflows from the air intake tube to the dust container and from the dust container to the suction source, thereby cleaning a surface.
4. The method of claim 3, wherein outside air is drawn into the air intake tube and flows to the dust container generally in a first direction, wherein air in the dust container flows to the suction source generally in a second direction, which crosses the first direction when viewed from the top of the handheld vacuum cleaner.
5. The method of claim 4, wherein the first and second direction cross at about a right angle.
6. The method of claim 3, wherein the second housing defines a conduit interconnecting between the air intake tube and the dust container of the first member, wherein the outside air drawn into the air intake tube flows through the conduit of the second housing to reach the dust container.
7. The method of claim 6, wherein the air intake tube is hingedly connected to the second housing, and wherein the method further comprises hingedly rotating the air intake tube between a first position and a second position.
8. The method of claim 2, wherein the first member is released from the main body without use of a tool.
9. The method of claim 2, further comprising:
disengaging the first member from the second member;
securing the first member to the main body such the dust container is in fluid communication with the first suction source; and
securing the second member to the main body.
10. The method of claim 9, wherein securing the first member to the main body does not require a tool.
11. The method of claim 1, wherein the main body further comprises a storage compartment and further comprises at least one of a nozzle and an extension tube stored in the storage compartment, wherein the method further comprises connecting at least one of the nozzle and the extension tube to the suction hose.
12. The method of claim 1, wherein the vacuum cleaner device is a canister type vacuum cleaner.
13. The method of claim 1, wherein the first member comprises partitioning walls configured to generate a swirling airflow within the dust container.
14. The method of claim 1, wherein the first housing comprises a first inlet and a first outlet, wherein the dust container is positioned in a path between the first inlet and the first outlet, wherein the main body comprises a first suction passage and a second suction passage, wherein the first suction passage is in fluid communication with the dust container via the first inlet, and the first suction source and the first outlet are in fluid communication via the second suction passage.
15. A method of vacuum cleaning, comprising:
providing a first member comprising a first housing and a dust container defined by or enclosed in the first housing;
providing a second member comprising a second housing and a suction source enclosed in the second housing;
engaging the first and second members so as to form a single body handheld vacuum cleaner, in which the dust container and the suction source are in fluid communication with each other, wherein the handheld vacuum cleaner comprises an air intake tube in fluid communication with the dust container; and
running the suction source so as to create airflows from the air intake tube to the dust container and from the dust container to the suction source, wherein outside air is drawn into the air intake tube and flows to the dust container generally in a first direction, wherein air in the dust container flows to the suction source generally in a second direction, which crosses the first direction when viewed from the top of the handheld vacuum cleaner.
16. The method of claim 15, wherein the first and second direction cross at about a right angle.
17. The method of claim 15, wherein the handheld vacuum cleaner further comprises an elongated handle, wherein when viewed from the top, the first housing is generally on one side of the elongated handle and the second housing is generally on the other side of the elongated handle.
18. The method of claim 15, wherein the elongated handle is fixed to the first housing.
19. The method of claim 15, wherein the second housing defines a conduit interconnecting between the air intake tube and the dust container of the first member, wherein the outside air drawn into the air intake tube flows through the conduit of the second housing to reach the dust container.
20. The method of claim 15, wherein the first member comprises partitioning walls configured to generate a swirling airflow within the dust container.

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 statistic counter device comprising:
a plurality of base counters;
a plurality of standby counters; and
a counter management portion which forms extension counters by dynamically linking the standby counters to higher digits of the base counters when the base counters reach a full count or a count before the full count by a fixed range, and releases the link when the extension counters are reset.
2. The statistic counter device as claimed in claim 1, wherein when the extension counters reach the full count or the count before the full count by the fixed range, the counter management portion forms re-extension counters in which the standby counters are linked to higher digits of the extension counters.
3. The statistic counter device as claimed in claim 1, wherein a total bit number of all of the base counters and all of the standby counters is equal to or more than a value obtained by multiplying a bit number of a counter capable of counting a value obtained by dividing a total count counted by all of the base counters and the extension counters within a predetermined time by a number of the base counters, by the number of the base counters, and is less than a value obtained by multiplying a bit number which a single counter requires for counting the total count by the number of the base counters.
4. The statistic counter device as claimed in claim 1, wherein a total bit number of all of the base counters and all of the standby counters, and numbers of the base counters and the standby counters are values corresponding to a distribution state of a bandwidth of a user packet.
5. The statistic counter device as claimed in claim 1, wherein the counter management portion includes a counter management memory indicating a link state of the base counters and the standby counters.
6. The statistic counter device as claimed in claim 5, wherein the counter management portion includes a counter management cache memory indicating extension counters composed of the base counters and the standby counters which are in the link state indicated by the counter management memory.
7. The statistic counter device as claimed in claim 1, wherein the counter management portion resets the base counters and the extension counters at a predetermined period.
8. The statistic counter device as claimed in claim 7, wherein the counter management portion adds a value of the base counters and the extension counters to a corresponding external counter before the reset.
9. The statistic counter device as claimed in claim 1, wherein a total bit number of all of the base counters and all of the standby counters, and numbers of the base counters and the standby counters are values corresponding to a stochastic distribution state of a user packet.
10. The statistic counter device as claimed in claim 9, wherein when the standby counters used for a linkage run short, the counter management portion resets the base counters or the extension counters to which the standby counters can not be linked.
11. The statistic counter device as claimed in claim 10, wherein the counter management portion adds values of the base counters or the extension counters to a corresponding external counter before the reset.
12. The statistic counter device as claimed in claim 2, wherein a total bit number of all of the base counters and all of the standby counters is equal to or more than a value obtained by multiplying a bit number of a counter capable of counting a value obtained by dividing a total count counted by all of the base counters and the extension counters within a predetermined time by a number of the base counters, by the number of the base counters, and is less than a value obtained by multiplying a bit number which a single counter requires for counting the total count by the number of the base counters.

1. A method for cleaning a stationary gas turbine unit during operation, wherein the unit comprises: a turbine; a compressor driven by the turbine, the compressor having an air inlet; and an air inlet duct arranged upstream of the air inlet of the compressor, the inlet duct having an acceleration duct adjoining the inlet of the compressor and having decreasing cross section in an air flow direction in order to increase the velocity of the air moving through the acceleration duct, with the air flow having a final velocity at the inlet to the compressor; the method comprising:
providing at least one spray nozzle positioned at the acceleration duct; and
introducing a spray of cleaning fluid within the acceleration duct wherein the cleaning fluid is forced through the at least one spray nozzle under sufficient pressure so as to form a spray of drops that penetrate the air flow, and with the spray being directed substantially parallel to and in the same direction as the direction of the air flow.
2. A method of claim 1, wherein the drops of the spray have a mean size that is less than around 150 \u03bcm.
3. A method of claim 1, wherein the air velocity is at least 40 percent of the final velocity at the compressor inlet.
4. A method of claim 1, wherein the drops of the fluid spray acquire a slip ratio of at least 0.8 at the compressor inlet.
5. A method of claim 1, wherein the cleaning fluid is forced through the spray nozzle with a pressure drop that is dependent on the location of the nozzle, and with the pressure drop within the acceleration duct being greater than a pressure drop occurring in the inlet upstream of the acceleration duct.
6. A method of claim 1, wherein cleaning fluid is forced through the spray nozzle with a pressure drop that is dependent on the location of the nozzle, and with the pressure drop within the acceleration duct being greater than a pressure drop occurring in the inlet upstream of the acceleration duct so that the drops of the spray stay in the air flow, to avoid leaving a liquid film within the inlet duct.
7. A method as claimed in claim 1, wherein the fluid spray is established so that a substantial proportion of its drops have a mean size within the interval of around 50-150 \u03bcm.
8. A method as claimed in claim 7, wherein the fluid spray drops are given a mean size of around 70 \u03bcm.
9. A method as claimed in claim 1, wherein the fluid spray drops are caused to acquire a slip ratio of at least 0.9 at the compressor inlet.
10. A method of claim 1, wherein the drops contact a compressor blade and a compressor stator vane.
11. A method of claim 1, wherein the drops have a mean size that remains substantially constant between about 50 to about 150 \u03bcm.
12. A method of claim 1, wherein the turbine is rotated with the aid of a start motor.
13. A method of claim 1, wherein a fuel is burned in a combustion chamber of the gas turbine unit.
14. A method for cleaning a stationary gas turbine unit during operation, wherein the unit comprises: a turbine; a compressor driven by the turbine, the compressor having an air inlet; an air inlet duct arranged upstream of the air inlet of the compressor, the inlet duct having a part of the duct adjoining the inlet of the compressor and having decreasing cross section in an air flow direction defining a high-velocity area in order to give the air flow a final velocity at the inlet to the compressor, the method comprising:
providing one or more spray nozzles positioned at the acceleration duct; and
introducing a spray of drops of cleaning fluid in the high-velocity area of the inlet duct, wherein the cleaning fluid is forced through the one or more spray nozzles and directed substantially parallel to and in the same direction as the direction of the air flow in order that the drops of the spray penetrate and stay in the air flow, to avoid leaving a liquid film within the high velocity area of the inlet duct, and the spray being introduced at a position in the duct section where the air velocity is a percentage of the final velocity at the compressor inlet.
15. A method of claim 14, wherein cleaning fluid is forced through the spray nozzle with a pressure drop that is dependent on the location of the nozzle, and with the pressure drop within the acceleration duct being greater than a pressure drop occurring in the inlet upstream of the acceleration duct so that the drops of the spray stay in the air flow instead of leaving a liquid film on the walls of the inlet duct.
16. A method of claim 15, wherein the drops of the spray have a mean size that is less than around 150 \u03bcm.
17. A method of claim 15, wherein the air velocity is at least 40 percent of the final velocity at the compressor inlet.
18. A method of claim 15, wherein the drops of the fluid spray acquire a slip ratio of at least 0.8 at the compressor inlet.
19. A method of claim 15, wherein the spray comprises a velocity within the range of about 100 ms to about 200 ms to enter the air flow and penetrate the compressor to wet and clean the rotating and fixed sections of the compressor and avoid substantial contact with the inlet structural supports.
20. A method of claim 14, wherein the drops contact a compressor blade and a compressor stator vane.
21. A method of claim 14, wherein the drops have a mean size that remains substantially constant between about 50 to about 150 \u03bcm.
22. A method of claim 14, wherein the turbine is rotated with the aid of a start motor.
23. A method of claim 14, wherein a fuel is burned in a combustion chamber of the gas turbine unit.
24. A system for cleaning a stationary gas turbine unit during operation, wherein the unit comprises:
a turbine;
a compressor driven by the turbine having an inlet; and
an air inlet duct arranged upstream of the compressor, the air inlet duct having an acceleration duct adjoining the inlet of the compressor, the acceleration duct having a decreasing cross section in an air flow direction in order to increase the velocity of the air moving through the acceleration duct, with the air flow having a final velocity at the inlet to the compressor; the system comprising:
one or more nozzles positioned in the acceleration duct;
the one or more nozzles having cleaning fluid forced there through in order to form a spray of drops that penetrate the air flow; and
the one or more nozzles directing the spray of drops in a direction substantially parallel to and in the same direction as the direction of the air flow, with the drops being carried by the air flow to contact one or more compressor blades for cleaning.
25. A system of claim 24, wherein the one or more nozzles are operated at a defined supply pressure to produce drops with mean size of around 50 to 150 \u03bcm.
26. A system of claim 24, wherein the one or more nozzles are operated at a defined supply pressure to produce a spray at a velocity within the range of about 100 ms to about 200 ms to allow injection into the compressor inlet air flow, wherein the spray enters the compressor inlet avoiding substantial contact with structural supports or boundaries of the inlet.
27. A system of claim 24, wherein the one or more nozzles are operated at a defined supply pressure to provide a spray with sufficient velocity within the range of about 100 ms to about 200 ms to enter the air flow and penetrate the compressor to wet and clean the rotating and fixed sections of the compressor.
28. A system of claim 27, wherein the cleaning fluid is forced through the spray nozzle with a pressure drop that is dependent on the location of the nozzle, and with the pressure drop within the acceleration duct being greater than a pressure drop occurring in the inlet upstream of the acceleration duct.
29. A system of claim 24, wherein the air inlet duct comprises a bell mouth and inner cone structure.
30. A system of claim 24, wherein the drops have a mean size that remains substantially constant between about 50 to about 150 \u03bcm.
31. A system of claim 24, wherein the turbine is rotated with the aid of a start motor.
32. A system of claim 24, wherein a fuel is burned in a combustion chamber of the gas turbine unit.

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 path size control method for a cross-connecting device connected to an upstream side cross-connecting device via a first transmission line and to a downstream side cross-connecting device via a second transmission line so as to relay a communication frame received from the first transmission line to the second transmission line in a Synchronous Digital HierarchySynchronous Optical Network (SDHSONET) network, the method comprising the steps of:
detecting index information indicating a size of a path from H1 and H2 bytes of a header of a first communication frame received from the first transmission line;
setting new index information into H1 and H2 bytes of a header of a second communication frame to be transmitted to the second transmission line if the path size has been specified from a manager system of the network; and
setting the detected index information into the H1 and H2 bytes of the header of the second communication frame if the path size has not been specified from the manager system of the network.
2. A path size control method according to claim 1, further comprising the steps of:
designating the maximum bandwidth of the path previously from said manager system;
comparing the path size determined from the index information detected from the H1 and H2 bytes of said first communication frame with said maximum bandwidth; and
generating an alarm to be notified to said manager system when it is judged that the path size determined from the detected index information exceeds the maximum bandwidth.
3. A cross-connecting device connected to an upstream side cross-connecting device via a first transmission line and a downstream side cross-connecting device via a second transmission line so as to relay a communication frame received from the first transmission line to the second transmission line in a Synchronous Digital HierarchySynchronous Optical Network (SDHSONET) network, comprising:
a first port connected to the first transmission line to receive a first communication frame;
a second port connected to the second transmission line to transmit a second communication frame including data extracted from the first communication frame; and
a path size determination means for detecting index information indicating the size of a path from H1 and H2 bytes of a header of the first communication frame and for setting the detected index information into H1 and H2 bytes of a header of the second communication frame if the path size has not been specified from a manager system of the network.
4. A cross-connecting device according to claim 3, wherein said path size determination means is comprised of:
a memory for storing bandwidth information indicating the maximum bandwidth of the path designated from said manager system; and
means for comparing the path size determined from the index information detected from the H1 and H2 bytes of said first communication frame with said maximum bandwidth and for generating an alarm to be notified to said manager system when it is judged that the path size determined from the detected index information exceeds the maximum bandwidth.