1. A method for maintaining data stored in a data processing device, the method comprising the steps of:
(a) generating a signature indicative of the data stored in the data processing device;
(b) communicating the signature to a maintenance node; and
(c) receiving updated data from the maintenance node depending upon the maintenance node determining if the signature is expected from the data processing device.
2. A method as claimed in claim 1, wherein the signature is generated by a hash function.
3. A method as claimed in claim 2, wherein the hash function is an MD5 hashing algorithm.
4. A method as claimed in claim 1, wherein the data is indicative of a configuration of the data processing device.
5. A method as claimed in claim 4, wherein the configuration of the data processing device is determined by identifying the hardware and software components installed on the data processing device.
6. A method as claimed in claim 5, wherein a hash value for each identified hardware and software component is generated and a further hash value is generated from each of the generated hash values for communicating to the maintenance node.
7. A method as claimed in claim 1, wherein the received signature is processing by a publishsubscribe mechanism.
8. A method for identifying a data update for communicating to a processing device, the method comprising the steps of:
(a) receiving a signature from the processing node, the received signature being indicative of data stored on the processing device;
(b) comparing the received signature with lookup data to determine an update to the data stored on the processing device.
9. A method as claimed in claim 8, wherein the update is communicated to the processing device.
10. A system for maintaining data stored in a processing device, the system comprising:
(a) a generator component for generating a signature indicative of the data stored in the processing device;
(b) the generator component communicating the signature to a maintenance processing node; and
(c) a receiver for receiving updated data from the maintenance node, the updated data being generated by the maintenance node in dependence of the maintenance node comparing the communicated signature with lookup data to determine an update to the data stored on the processing device.
11. A system as claimed in claim 10, wherein the signature is generated by a hash function.
12. A system as claimed in claim 11, wherein the hash function is an MD5 hashing algorithm.
13. A system as claimed in claim 10, wherein the data is indicative of a configuration of the data processing device.
14. A system as claimed in claim 13 further comprises an identifier component for identifying the configuration of the data processing device by determining the hardware components and the software components installed on the data processing device.
15. A system as claimed in claim 14, wherein the generator component generates a hash value for each identified hardware component and software component and generates a further hash value from the combination of each of the generated hash values for communicating to the maintenance node.
16. A system as claimed in claim 10, wherein a receiver component processed the received signature by a publishsubscribe mechanism.
17. A system for identifying a data update for communication to a processing device, the system comprising:
(a) a receiver component for receiving a signature from the processing node, the received signature being indicative of data stored on the processing device; and
(b) a comparator component for comparing the received signature with lookup data to determine an update to the data stored in the processing device.
18. A system as claimed in claim 17, further comprises a communicator component for communicating the update to the processing device.
19. A computer program product comprising a computer usable medium having computer usable program code, wherein when the computer usable program code is loadable into the internal memory of a processing device, causes the processing device to:
(a) generate a signature indicative of the data stored in the data processing device;
(b) communicate the signature to a maintenance node across a network;
(c) receive updated data from the maintenance node if the maintenance node determines the signature is expected from the data processing device.
20. The computer program product of 19, wherein the program code causes the data processing device to generate the signature using a hash function.
21. The computer program product of claim 20, wherein the program code causes the data processing device to generate the signature indicative of a configuration of the data processing by identifying the hardware and software components installed on the data processing device.
22. The computer program product of claim 21, wherein a hash value for each identified hardware and software component is generated, and a further hash value is generated from each of the generated hash values.
23. The computer program product of claim 22, wherein the received signature is processing by a publishsubscribe mechanism.
24. A service contract for managing service transactions between at least one microprocessor device and a maintenance mode coupled to a communication network, the at least one microprocessor device having processing hardware andor software, the service contract comprising:
(a) a plurality of hash values generated by the service contract, one of the plurality of hash values pertaining to each of the hardware andor software configuration of the at least one microprocessor device;
(b) a configuration hash value generated by the service contract, the configuration hash value generated from the combination of the plurality of hash values pertaining to each of the at least one microprocessor devices;
(c) a signature file unique to each of the at least one microprocessor devices, the signature file generated by the service contract indicative of the configuration hash value of the at least one microprocessor device.
25. The service contract of claim 24, further comprising:
(a) a maintenance node coupled to the at least one processing device, the maintenance node receiving a signature for each of the plurality of processing devices; the maintenance node comprising:
(i) a pre-registered signature component having expected signatures of each of the plurality of processing devices;
(ii) a comparator component having a rules engine that compares the received signature with the expected signature;
(iii) an update configuration component that transmits updated data to one of the plurality of processing devices when the received signature matches the expected signature and when updated data for the processing device are available.
26. The service contract of claim 25, further comprising a target configuration stored in the maintenance node, the target configuration indicative of the updated data to be transmitted to one of the plurality of processing devices.
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 paint circulating system back pressure regulator comprising:
a paint flow passage at least partially disposed between a fixed structure and a moveable structure, wherein the moveable structure is moveable to vary a width of the paint flow passage to regulate a pressure of paint upstream of the regulator while paint flows through the paint flow passage, and the moveable structure comprises a rigid structure coupled to a first flexible membrane that opens and closes against a surface of the fixed structure, wherein a surface of the first flexible membrane contacts the fixed structure when the moveable structure closes against the surface of the fixed structure;
a chamber having an opening configured to communicate with a supply of pressurized fluid, wherein the regulator is configured to vary a fluid pressure of the pressurized fluid to control an adjustable set point of the pressure of paint upstream of the regulator; and
a plurality of independent moveable structures each located in a separate chamber of a plurality of separate chambers, wherein each respective separate chamber of the plurality of separate chambers is configured to be independently pressurized by the supply of pressurized fluid to move one of the plurality of independent moveable structures.
2. The paint circulating system back pressure regulator as claimed in claim 1, wherein the pressurized fluid is compressed air.
3. The paint circulating system back pressure regulator as claimed in claim 1, comprising a biasing member configured to restrict the paint flow passage against the pressure of paint in the paint flow passage when the pressurized fluid is not applied to the chamber.
4. The paint circulating system back pressure regulator as claimed in claim 3, wherein the biasing member is a coiled spring.
5. The paint circulating system back pressure regulator as claimed in claim 3, wherein the biasing member is of adjustable strength.
6. The paint circulating system back pressure regulator as claimed in claim 4, wherein the coiled spring biases the moveable structure toward a closed position to restrict the paint flow passage, and the chamber is pressurized by the supply of pressurized fluid to bias the moveable structure against the coiled spring and toward an open position to open the paint flow passage.
7. The paint circulating system back pressure regulator as claimed in claim 3, wherein the biasing member is isolated from the paint flow passage.
8. The paint circulating system back pressure regulator as claimed in claim 1, wherein the moveable structure comprises a second flexible membrane coupled to the rigid structure.
9. The paint circulating system back pressure regulator as claimed in claim 1, comprising a coiled spring operable to restrict the paint flow passage against the pressure of paint in the paint flow passage when pressurized fluid is not applied to the plurality of separate chambers.
10. A system, comprising:
a back pressure regulator, comprising:
a paint flow passage;
a fixed structure having a first surface; and
a moveable assembly, wherein the movable assembly comprises:
a first independently moveable portion having a first structure coupled to a first membrane; and
a second independently moveable portion having a second structure coupled to a second membrane, wherein the second independently moveable portion comprises a second surface configured to move against the first surface to close the paint flow passage and move away from the first surface to open the paint flow passage, and the moveable assembly is movable to vary a width of the paint flow passage between the first and second surfaces to regulate a pressure of paint upstream of the back pressure regulator while paint flows through the paint flow passage.
11. The system of claim 10, wherein the back pressure regulator comprises a spring operable to restrict the flow passage against a pressure of paint in the flow passage.
12. The system of claim 11, comprising a spring adjuster configured to adjust a compression of the spring to set the pressure of the paint upstream of the back pressure regulator.
13. The system of claim 10, wherein the first and second independently moveable portions each comprise a shaft and a seal disposed about the shaft.
14. A system, comprising:
a back pressure regulator, comprising:
a paint flow passage at least partially disposed between a fixed structure and a first moveable structure, wherein the first moveable structure is movable to vary a width of the paint flow passage to regulate a pressure of paint upstream of the back pressure regulator while paint flows through the paint flow passage;
a biasing member configured to bias the first moveable structure toward a closed position to close the paint flow passage, wherein the biasing member is isolated from the paint flow passage; and
first and second chambers configured to communicate with a supply of pressurized fluid, wherein the first chamber comprises a first membrane coupled to a second moveable structure, and the second chamber comprises a second membrane coupled to a third moveable structure, and wherein the back pressure regulator is configured to vary a fluid pressure of the pressurized fluid to control an adjustable set point of the pressure of paint upstream of the back pressure regulator.
15. The system of claim 14, wherein the pressure of the pressurized fluid biases the first moveable structure against the biasing member and toward an open position to open the paint flow passage.
16. The system of claim 14, wherein the biasing member comprises a spring.
17. A paint circulating system back pressure regulator comprising:
a paint flow passage at least partially disposed between a fixed structure and a moveable structure, wherein the moveable structure is moveable to vary a width of the paint flow passage to regulate a pressure of paint upstream of the regulator while paint flows through the paint flow passage, and the moveable structure comprises a flexible membrane that opens and closes against a surface of the fixed structure;
a chamber having an opening configured to communicate with a supply of pressurized fluid; and
a plurality of independent moveable structures located in separate chambers, wherein each separate chamber is configured to be independently pressurized by the supply of pressurized fluid to move one of the independent moveable structures, wherein the regulator is configured to vary a fluid pressure of the pressurized fluid to control an adjustable set point of the pressure of paint upstream of the regulator.
18. The paint circulating system back pressure regulator as claimed in claim 17, comprising a coiled spring operable to restrict the paint flow passage against the pressure of paint in the paint flow passage when pressurized fluid is not applied to the separate chambers.