Author: claimsbot

1. A navigation device comprising:
a locator for determining a location of the navigation device;
a processor;
at least one of an audio output device and a display controllable by the processor; and
a store for map data and historical data, said historical data comprising historical information about a location and a location identifier identifying the location,
wherein said processor is arranged to control at least one of the audio output device and display to convey the historical information as at least one of an audio and visual output in response to the processor determining from the locator that the navigation device is in the vicinity of the location identified by the location identifier.
2. A navigation device according to claim 1, wherein the processor is arranged to map position fixes obtained via the locator to the map data.
3. A navigation device according to claim 2, wherein the location identifier of the historical data identifies a location on the map data and the processor determines that the navigation device is in the vicinity of the location identified by the location identifier by map matching the position fixes of the locator to the map data, determining a current location of the navigation device on the map data and determining whether the current location on the map data is in the vicinity of the location on the map data identified by the location identifier of the historical data.
4. A navigation device according to claim 1, wherein the navigation device is considered to be in the vicinity of the location identified by the location identifier if the navigation device is at the same location on a navigable route as the location identified by the location identifier.
5. A navigation device according to claim 1, wherein the navigation device is considered to be in the vicinity of the location identified by the location identifier if the navigation device is within a predetermined distance of the location identified by the location identifier.
6. A navigation device according to claim 5, wherein the predetermined distance is fixed.
7. A navigation device according to claim 5, wherein the predetermined distance can be varied.
8. A navigation device according to claim 7, wherein a user sets the predetermined distance.
9. A navigation device according to claim 8, wherein the processor is arranged to cause the display to display a request for the predetermined distance and configure an input interface to receive a selection of a predetermined distance.
10. A navigation device according to claim 1, wherein the navigation device is considered to be in the vicinity of the location identified by the location identifier if the location identified by the location identifier is considered to be in view from a current location of the navigation device.
11. A navigation device according claim 10, wherein the location identifier identifies from which locations on navigable routes of the map data the historical location can be seen and the processor is arranged to control the at least one of audio output device and display to convey the historical information when the navigation device is at one of these locations on the navigable routes.
12. A navigation device according to claim 1, wherein the historical data comprises a type identifier identifying one or more attributes (other than location) of the historical location.
13. A navigation device according to claim 12, wherein the processor is arranged to control at least one of the audio output device and display to convey historical information based on the type identifier associated with that historical information.
14. A navigation device according to claim 13, wherein the processor is arranged to cause the display to display a request for a selection of one or more attributes of historical sites that is of interest to the user and configure the input interface to receive a selection of the one or more attributes.
15. A navigation device according to claim 14, wherein, in response to the selection, the processor is arranged to only convey historical information having one or more, or even all, of the attributes selected by the user.
16. A navigation device according to claim 12, wherein the input interface is configured to enable a user to select a destination and the processor is arranged to determine a navigable route based on the selected destination and identify historical locations in the vicinity of the planned route.
17. A navigation device according to claim 12, wherein the input interface is configured to enable a user to select a type of historical location that shehe would like to visit and the processor is arranged to determine a navigable route based on the selected type of historical location.
18. A data carrier having stored thereon historical data comprising historical information about a location and a location identifier identifying the location on map data that is used by a navigation device to determine a navigable route.
19. A server comprising memory having stored thereon historical data comprising historical information about a location and a location identifier identifying the location on map data that is used by a navigation device to determine a navigable route, a communication link for communicating with a navigation device according to claim 1 and a processor arranged to send historical data to the navigation device.
20. A data carrier having stored thereon instructions that, when executed by a processor of a navigation device comprising:
a locator for determining a location of the navigation device;
at least one of an audio output device and a display controllable by the processor; and
a store for map data and historical data, said historical data
comprising historical information about a location and a location identifier identifying the location,

causes the processor to control at least one of the audio output device and display to convey the historical information as at least one of an audio and visual output in response to the processor determining from the locator that the navigation device is in the vicinity of the location identified by the location identifier.

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 fuel system for an aircraft, the fuel system comprising:
a main pump that receives fuel from a source;
a servo pump that receives fuel from the source;
a metering valve that receives main flow from the main pump;
a shut-off valve that receives fuel flow from the modulating valve;
an actuator that receives fuel flow from the servo pump; and
a pump sharing valve that receives circulating flow from the servo pump and that alternatively directs shared flow to the main flow or an inlet of the servo pump.
2. The fuel system of claim 1 wherein the pump sharing valve further controls fuel through a fuel circuit connecting the output flow with the circulating flow.
3. The fuel system of claim 2 and further comprising:
a pressure regulating valve disposed in a bypass line connecting a high pressure side of the main pump with a low pressure side of the main pump.
4. The fuel system of claim 3 wherein the pressure regulating valve is actuated by output pressure of the metering valve.
5. The fuel system of claim 2 wherein the metering valve includes:
a shut-off port that actuates the shut-off valve.
6. The fuel system of claim 5 wherein the shut-off port provides:
a low signal pressure to the shut-off valve in a run mode so that the shut-off valve is biased open; and
a high signal pressure to the shut-off valve in a shut-down mode so that the shut-off valve is forced closed.
7. The fuel system of claim 2 wherein the modulating valve includes:
an unloading port that actuates the pump sharing valve.
8. The fuel system of claim 7 wherein the shut-off port provides:
a high signal pressure to the pump sharing valve in a run mode so that the pump sharing valve provides the shared flow to the main flow; and
a low signal pressure to the pump sharing valve in a shut-down mode so that the pump sharing valve provides the shared flow to the inlet of the servo pump.
9. The fuel system of claim 1 and further comprising:
a boost pump that provides fuel from the source to the main pump and the servo pump; and
fuel nozzles that receive fuel from the shut-off valve.
10. The fuel system of claim 1 and further comprising:
a filter positioned between the servo pump and the actuator; and
a minimum pressure valve positioned between the servo pump and the pump sharing valve.
11. A fuel system comprising:
a first pump;
a first valve that receives outflow from the first pump;
a second valve that receives outflow from the first valve, the second valve further receiving a pressure signal from the first valve to open and close the second valve;
a second pump;
an actuator that receives outflow from the second pump;
a third valve that receives outflow from the second pump, the third valve further receiving a pressure signal from the first valve to shift the third valve between two states,
the first state providing outflow of the third valve to inflow of the second pump;
the second state providing outflow of the third valve to outflow of the first pump.
12. The fuel system of claim 11 and further comprising:
a fuel circuit connecting outflow of the first pump to outflow of the second pump.
13. The fuel system of claim 12 wherein the third valve controls flow through the fuel circuit.
14. The fuel system of claim 12 and further comprising:
a fourth valve disposed in a bypass line to fluidly connect outflow of the first pump with inflow of the first pump.
15. The fuel system of claim 14 wherein the fourth valve is actuated by output pressure of the first valve.
16. The fuel system of claim 11 and further comprising:
a third pump that provides input to an inlet of the first pump and an inlet of the second pump; and
fuel nozzles that receive fuel from the second valve.
17. The fuel system of claim 11 and further comprising:
a fifth valve positioned between the second pump and the third valve.
18. A fuel system comprising:
a main pump;
a metering valve comprising:
a main window;
an unloading port; and
a shut-off port;

a main line that connects output of the main pump to the main window of the metering valve;
a shut-off valve that receives the output from the metering valve, the shut-off valve further receiving a pressure signal from the shut-off port;
a servo pump;
a pump sharing valve comprising:
a share window; and
a sharing port;
wherein the pump sharing valve receives a pressure signal from the unloading port;

a servo line that connects the servo pump to the share window of the pump sharing valve;
a fuel circuit connecting the main line to the servo line, wherein the sharing port opens and closes the fuel circuit;
wherein the share window of the pump sharing valve alternatively connects to the main line or an inlet of the servo pump.
19. The fuel system of claim 18 and further comprising:
a bypass line connecting a high pressure side and a low pressure side of the main pump; and
a pressure regulating valve coupled to the bypass line, wherein the pressure regulating valve receives a pressure signal from the metering valve.
20. The fuel system of claim 18 and further comprising:
an actuator that receives flow from the servo line; and
nozzles that receive flow from the shut-off valve.

What is claimed is:

1. An apparatus for writing position data onto a first data storage disc comprising:
a spindle assembly configured to support first and second discs rotatably in a stack;
an actuator configured to support a servowriter head between the discs to write several servo marks onto a data surface of the first disc;
a support element configured to allow sliding contact with the actuator to unload the servowriter head from the data surface; and
means for retracting the actuator and the support element from between the first and second discs.
2. An apparatus according to claim 1 in which the discs have a nominal radius R and in which the support element is constructed and arranged to extend between the first and second discs by a distance greater than R6.
3. An apparatus according to claim 1 in which the support element is a rotary cam structure, and in which the retracting means is an engagement surface configured to support the actuator while the cam structure rotates out from between the first and second discs.
4. An apparatus according to claim 3 in which the discs have a nominal radius R and in which the support element is constructed and arranged to extend between the first and second discs by a distance greater than R6.
5. An apparatus according to claim 1 in which the actuator is rigidly but rotatably supported by a first rigid body, in which the spindle assembly is rigidly but rotatably supported by a second rigid body, and further comprising automated means for coupling the first and second rigid bodies temporarily during a servowriting operation.
6. An apparatus according to claim 5 in which the support element is a rotary cam structure, and in which the retracting means is an engagement surface configured to support the actuator while the cam structure rotates out from between the first and second discs.
7. An apparatus according to claim 5 in which the discs have a nominal radius R and in which the support element is constructed and arranged to extend between the first and second discs by a distance greater than R6.
8. An apparatus according to claim 1 in which the stack has a substantially horizontal axis of rotation.
9. An apparatus according to claim 8 in which the support element has a substantially horizontal axis of rotation.
10. An apparatus according to claim 8 in which the actuator is rigidly but rotatably supported by a first rigid body, in which the spindle assembly is rigidly but rotatably supported by a second rigid body, and further comprising automated means for coupling the first and second rigid bodies temporarily during a servowriting operation.
11. An apparatus according to claim 8 in which the support element is a rotary cam structure, and in which the retracting means is an engagement surface configured to support the actuator while the cam structure rotates out from between the first and second discs.
12. An apparatus according to claim 8 in which the discs have a nominal radius R and in which the support element is constructed and arranged to extend between the first and second discs by a distance greater than R6.
13. A method for writing position data comprising steps of:
(a) assembling first and second discs coaxially in a stack, the first disc having a first data surface facing the second disc;
(b) writing several servo marks onto the data surface with a servowriter head supported by an actuator;
(c) moving the actuator out from between the first and second discs by sliding the actuator onto an engagement surface of a support element that extends between the first and second discs;
(d) moving the support element out from between the first and second discs as the actuator slides on the engagement surface; and
(e) removing the first and second discs from the stack.
14. A method according to claim 13 in which the writing step (b) includes a step (b1) of sliding the actuator along a portion of the engagement surface that approaches the first disc at an approach angle of less than about 25 degrees relative to the disc surface until the actuator disengages from the support element.
15. A method according to claim 14 in which the servowriter head is constructed and arranged to fly at a median distance of less than one microinch from the data surface while writing the servo marks.
16. A method according to claim 13 in which the writing step (b) includes a step (b1) of sliding the actuator along a portion of the engagement surface that approaches the first disc at an approach angle of 4 to 10 degrees relative to the disc surface until the actuator disengages from the support element.
17. A method according to claim 13 in which the writing step (b) includes steps of:
(b1) loading the servowriter head adjacent the first data surface while the disc stack rotates at an initial speed; and
(b2) rotating the disc stack at least 5% slower than at the initial speed while the head writes the several servo marks onto the data surface.
18. A method according to claim 17 in which the writing step (b) further includes a step (b3) of sliding the actuator along a portion of the engagement surface that approaches the first disc at an approach angle of 4 to 10 degrees relative to the disc surface until the actuator disengages from the support element.
19. A method according to claim 13 in which the actuator movement step (c) is performed by rotating the actuator within a fixed angular range having two extreme positions.
20. A method according to claim 19 in which the support element movement step (d) is performed while holding the actuator at one of the extreme positions.
21. A method according to claim 19 in which the writing step (b) includes a step (b1) of sliding the actuator along a portion of the engagement surface that approaches the first disc at an approach angle of less than about 25 degrees relative to the disc surface until the actuator disengages from the support element.
22. A method according to claim 13 in which the support element movement step (d) is performed by rotating the support element about an axis of rotation.
23. A method according to claim 13 in which the support element movement step (d) is begun after the actuator is moved out from between the first and second discs.
24. A method according to claim 13 in which the actuator movement step (c) and the support element movement step (d) overlap.
25. A method according to claim 13 in which the discs have a nominal radius R, and in which the actuator and the support element continuously remain with a distance of R6 of the discs throughout performing the steps (b) through (d).
26. A method according to claim 13 in which the removing step (e) begins by moving the discs axially.
27. A method according to claim 13 further comprising steps of:
(f) installing the first disc into a disc drive; and
(g) after the installing step (f), using the servo marks to position a transducer while the transducer writes additional position data onto the data surface.
28. A method according to claim 27 in which the writing step (b) includes a step (b1) of sliding the actuator along a portion of the engagement surface that approaches the first disc at an approach angle of less than about 25 degrees relative to the disc surface until the actuator disengages from the support element.
29. A method according to claim 27 in which the support element movement step (d) is begun after the actuator is moved out from between the first and second discs.
30. A method according to claim 27 in which the removing step (e) begins by moving the discs axially.

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 system for forming an annular isolator between tubing and a borehole having a minimum expected diameter and a maximum expected diameter comprising:
a section of expandable tubing having a first unexpanded outer diameter and a second expanded outer diameter, and
an annular ring of elastomeric material carried on the outer surface of said tubing, said ring having radial and axial dimensions selected so that upon expansion of said tubing in a borehole having said maximum expected diameter, said annular ring will contact said borehole and be compressed with a preselected minimum stress, and upon expansion of said tubing in a borehole of minimum expected diameter, said annular ring will contact said borehole and be compressed with a preselected maximum stress.
2. The system according to claim 1 wherein said annular ring has a inner surface in contact with said expandable tubing and an outer surface for contacting a borehole and has a first axial dimension at its inner surface and a second axial dimension at its outer surface, said first axial dimension being greater than said second axial dimension.
3. The system according to claim 1, further comprising a pair of said annular rings spaced axially apart on said expandable tubing by a sufficient distance so that upon expansion of said tubing in a borehole of minimum expected diameter said rings may expand axially without contacting each other.
4. The system according to claim 1, further comprising:
a pair of said annular rings spaced axially apart on said expandable tubing, and
an elastomeric sleeve carried on said tubing between said pair of annular rings, said sleeve having a radial dimension substantially smaller than the radial dimension of said annular rings.
5. The system according to claim 4, wherein the elastomeric sleeve comprises a material which swells upon contact with fluid in a borehole.
6. The system according to claim 5, wherein the material comprises low acrylic-nitrile.
7. The system according to claim 5, wherein the material comprises an EPDM compound.
8. The system according to claim 1, further comprising a pair of said annular rings spaced axially apart on said expandable tubing by a sufficient distance so forces required to expand said tubing in a borehole of minimum expected diameter do not exceed the limits of the expansion tool or damage the tubing or borehole.
9. The system according to claim 1, further comprising:
a pair of said annular rings spaced axially apart on said expandable tubing, and
a band of chemically reactive materials carried on said tubing between said pair of annular rings, said materials encased in a protective covering preventing chemical reactions from occurring when said tubing is unexpanded and allowing chemical reactions to occur when said tubing is expanded.
10. The system according to claim 1, further comprising:
a pair of said annular rings spaced axially apart on said expandable tubing,
a compartment carried with said tubing,
an annular isolator forming material carried in said compartment, and
a flow path from said compartment to the space between said pair of rings, whereby upon expansion of said tubing said material flows into the space between said pair of rings and forms an annular isolator.
11. The system according to claim 1, wherein said tubing includes a section of reduced diameter relative to said first unexpanded diameter and said annular ring is carried on said section of reduced diameter.
12. The system according to claim 1, wherein the annular ring comprises a material which swells upon contact with fluid in a borehole.
13. The system according to claim 12, wherein the material comprises low acrylic-nitrile.
14. The system according to claim 12, wherein the material comprises an EPDM compound.
15. A method for forming an annular isolator between expandable tubing and a borehole comprising:
attaching an elastomeric sleeve to a section of expandable tubing,
installing the tubing in a borehole,
expanding the tubing with a first expansion tool having a fixed expansion diameter, and
further expanding the tubing in the location of said sleeve.
16. The method according to claim 15, further comprising using a variable expansion cone to further expand the tubing in the location of said sleeve.
17. The method according to claim 15, further comprising applying pressure inside the tubing in the location of said sleeve to further expand said tubing.
18. The method according to claim 17, further comprising applying axial compression to said tubing in the location of said sleeve.
19. The method according to claim 15, further comprising using an expandable bladder at the location of said sleeve to further expand said tubing.
20. The method according to claim 15, further comprising swelling the elastomeric sleeve in the borehole.
21. The method according to claim 20, further comprising swelling the elastomeric sleeve by exposing the elastomeric sleeve to fluid in the borehole.