Author: claimsbot

1. Mobile paving machine for the installation of ground covering material consisting of synthetic coatings, elastic base layers or ground pavement, the paving machine comprising:
a smoothing board for stripping off the ground covering material and the smoothing board is adjustable in its vertical position by a height adjustment device and the paving machine has a probing unit with a probing foot, which probes the ground level next to the paving machine, and the probing unit acts on the position of the smoothing board via the height adjustment device so that the ground covering material is flush with the ground level,
wherein the probing unit has a probing foot held by a probe support, and the probe support is articulated to a support joint, while a sensor or switch unit is provided, held by a switch support, and the switch support is articulated to a joint on the probe support,
wherein a vertical position of the sensor or switch unit is changeable, and the probe support is elongated having the probing foot arranged at one end thereof and having the support joint at an opposite free end thereof for supporting the probe support from a frame of the paving machine, and
wherein the vertical position of the support joint is changeable, wherein the height adjustment device raises or lowers the support joint, and
wherein the probe support interacts with the sensor or switch unit depending on the position of the probe support andor the position of the joint on the probe support.
2. Paving machine according to claim 1, wherein the switch support has switch support segments extending on either side of the joint and the two switch support segments have equal or unequal lever arms.
3. Paving machine according to claim 1, wherein the probe support is variable in length.
4. Paving machine according to claim 3, wherein the probe support is telescopic.
5. Paving machine according to claim 1, wherein the probe support has segments extending on either side of the joint and one segment is provided that extends from the joint to the support joint.
6. Paving machine according to claim 5 wherein the one segment is shorter than the segment that extends from the joint in the direction of the probing arm.
7. Paving machine according to claim 1, wherein the switch support has switch support segments extending on either side of the joint and the probe support has segments extending on either side of the joint and the segments have a length ratio from one of either of 1:1 to 1:4 and 1:1 to 1:3.
8. Paving machine according to claim 1 wherein at least one of (a) the vertical position is changeable by the height adjustment device, and (b) the sensor or switch unit is held by the switch support and wherein the switch support is articulated to a joint on the probe support, and (c) the joint on the probe support is located between the probing foot and the support joint, and (d) the vertical position of the support joint is changeable.
9. Paving machine according to claim 1 wherein the switch support is an elongated switch support that is maintained substantially in parallel with the elongated probe support, and the joint between the probe support and the switch support is disposed at a location that is intermediate ends of the respective probe support and switch support.
10. Paving machine according to claim 1, wherein at least one of (a) a leveling stop is provided on the sensor or switch unit or the switch support, and further comprising a bearing element that can change its vertical position by the height adjustment device and that interacts with the leveling stop, wherein the joint on is located between the leveling stop and the sensor or switch unit, and (b) the sensor or switch unit defines at least three positions and the probe support has a support contact surface, while the sensor or switch unit interacts with the support contact surface of the probe support so that the sensor or switch unit takes up one of the three positions, raising or lowering of the height adjustment device or neutral, and (c) the sensor or switch unit is configured as a switching arrangement including a pin and a spring and wherein the pin of the switching arrangement interacts with the support contact surface against the force of a spring and takes up one of the at least three positions, in particular, wherein the neutral position is given in that the probing foot lies against the ground level, the leveling stop lies against the bearing element, and the pin lies against the support contact surface and the switching arrangement is in a first depressed position, and (d) wherein one of the at least three positions includes a \u201craising\u201d position that comprises a raising of the probing foot and resulting lifting of the pin from the contact surface and the unloading position of the switching arrangement defined by this, and (e) wherein another of the at least three positions includes a \u201clowering\u201d position that is characterized by a lowering of the probing foot, for example, due to a depression in the ground, so that the leveling stop presses against the bearing element and due to the levered, articulated arrangement of the switch support on the joint the contact surface presses the pin into a second depressed position of the switching arrangement.
11. Paving machine according to claim 1, wherein the smoothing board has a bottom base with a heatable surface and wherein the heatable surface is provided on the bottom base of the smoothing board next to the ground cover material.
12. Paving machine according to claim 1, wherein the paving machine has a short probing foot, whose length is less than 10% of a length of the paving machine.
13. Paving machine according to claim 1, wherein the paving machine has a long probing foot, whose length is greater than 80% of a length of the paving machine.
14. Paving machine according to claim 1, wherein the probing foot has a probing arm and a bearing point, and the probing foot is mounted at the bearing point on the probing arm.
15. Paving machine according to claim 14, wherein the bearing point can change along at least part of the lengthwise dimension of the probing foot.
16. Paving machine according to claim 1, wherein the probing foot has a probing arm and a bearing point, and the probing foot is held by the probe support and the length of the probe support is variable, the probe support being telescopic.
17. Paving machine according to claim 1, wherein the height adjustment device has at least one guide, for example, an adjusting spindle or the like, and a height adjustment drive.
18. Paving machine according to claim 1, wherein the height adjustment device has at least one guide, for example, an adjusting spindle or the like, and a height adjustment drive, and wherein a bearing element is arranged on the guide and the bearing element is configured in particular as an adjusting nut arranged on the adjusting spindle.
19. Paving machine according to claim 1, wherein the sensor or switch unit has a switch setting and depending on the switch setting of the sensor or switch unit, a raising or lowering command goes to the height adjustment device, in particular, to a height adjustment drive.
20. Paving machine according to claim 1, wherein the switch support has switch support segments extending on either side of the joint and a leveling stop is provided on the sensor or switch unit or the switch support and a length of the switch support segment between the joint and the leveling stop is smaller than the length of the switch support piece between the joint and the sensor or switch unit.
21. Paving machine according to claim 20, wherein a length of the switch support segment between the joint and the leveling stop is either (a) less than half a length of the switch support piece between the joint and the sensor or switch unit or (b) less than \u2153 the length of the switch support piece between the joint and the sensor or switch unit.
22. Paving machine according to claim 1, wherein a noncontact or a contact-type sensing of the ground level by the probing foot is provided.
23. Paving machine according to claim 1, wherein the paving machine comprises one of an automotive and a towed paving machine.

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 pressure relief nozzle, comprising:
a hollow nozzle body having an upper end, a lower end, and an interior passage connecting said upper end to said lower end and defining a fluid flow path for fluid flowing through said interior passage;
a flow control member located in said fluid flow path, said flow control member movable between a first position and a second position, dependent upon a difference in fluid pressure of said fluid at said upper end and said lower end of said nozzle body.
2. The pressure relief nozzle of claim 1, said upper end including means for connecting said nozzle body to a nozzle bore in a drill bit body.
3. The pressure relief nozzle of claim 1, said first position being a fully open position and said second position being a fully closed position.
4. The pressure relief nozzle of claim 1, said flow control member being a plug inserted in said nozzle body.
5. The pressure relief nozzle of claim 1, said flow control member moving linearly with respect to said nozzle body to move from said first position to said second position.
6. The pressure relief nozzle of claim 1, said flow control member moving laterally with respect to said nozzle body to move from said first position to said second position.
7. The pressure relief nozzle of claim 6, said flow control member including a ramp.
8. The pressure relief nozzle of claim 6, said flow control member including a sliding ramp.
9. The pressure relief nozzle of claim 6, said flow control member including a first ramp and a second ramp.
10. The pressure relief nozzle of claim 6, said flow control member including a first sliding ramp and a second sliding ramp.
11. The pressure relief nozzle of claim 1, said first position allowing fluid flow through said pressure relief nozzle and said second position not allowing fluid flow through said pressure relief nozzle.
12. The pressure relief nozzle of claim 1, said first position defining a first diameter for said interior passage and said second position defining a second diameter for said interior passage, said first diameter being larger than said second diameter.
13. The pressure relief nozzle of claim 1, said flow control member being repeatedly movable from said first position to said second position, and from said second position to said first position.
14. The pressure relief nozzle of claim 13, said first position defining a first diameter for said interior passage and said second position defining a second diameter for said interior passage, said first diameter being larger than said second diameter.
15. The pressure relief nozzle of claim 1, said flow control member controlling a flow area for said fluid flow path, said first position providing a larger flow area than said second position.
16. A method for operating a pressure relief nozzle, comprising;
installing a pressure relief nozzle to a drill bit body, said pressure relief nozzle having a fluid flow passage, said fluid flow passage having a first minimum diameter and a second minimum diameter dependent upon a pressure of fluid in said fluid flow passage, said first diameter being smaller than said second diameter;
opening said pressure relief nozzle from said first diameter to said second diameter; and
closing said pressure relief nozzle from said second diameter to said first diameter.
17. The method of claim 16, further comprising:
re-opening said pressure relief nozzle.
18. The method of claim 17, said pressure having an initial value and staying within ten percent of said initial value throughout said opening, closing, and re-opening steps.
19. The method of claim 17, said pressure having an initial value and staying within five percent of said initial value throughout said opening, closing, and re-opening steps.
20. The method of claim 16, further comprising:
installing a second pressure relief nozzle to said drill bit body; said second pressure relief nozzle having a second fluid flow passage, said second fluid flow passage having a first minimum diameter and a second minimum diameter dependent upon said pressure of fluid in said second fluid flow passage, said first diameter of said second fluid flow passage being smaller than said second diameter of said second fluid flow passage;
opening said second pressure relief nozzle from said first diameter to said second diameter; and
closing said second pressure relief nozzle from said second diameter to said first diameter.
21. The method of claim 16, further comprising:
increasing fluid flow through said fluid flow passage from an initial flow value simultaneous with said opening step;
decreasing fluid flow through said fluid flow passage simultaneous with said closing step.
22. A drill bit comprising:
a drill bit body;
a pressure relief nozzle installed into said drill bit body, said pressure relief nozzle comprising
hollow nozzle body having an upper end, a lower end, and an interior passage connecting said upper end to said lower end and defining a fluid flow path for fluid flowing through said interior passage;
a flow control member located in said fluid flow path, said flow control member movable between a first position and a second position, dependent upon a difference in fluid pressure of said fluid at said upper end and said lower end of said nozzle body.
23. The drill bit of claim 22, further comprising:
a second pressure relief nozzle installed into said drill bit body, said second pressure relief nozzle comprising,
hollow nozzle body having an upper end, a lower end, and an interior passage connecting said upper end to said lower end and defining a fluid flow path for fluid flowing through said interior passage;
a flow control member located in said fluid flow path, said flow control member movable between a first position and a second position, dependent upon a difference in fluid pressure of said fluid at said upper end and said lower end of said nozzle body for said second pressure relief nozzle.
24. The drill bit of claim 22, said first position being a fully open position and said second position being a fully closed position.
25. The drill bit of claim 22, said flow control member being a plug inserted in said nozzle body.
26. The drill bit of claim 22, said flow control member moving linearly with respect to said nozzle body to move from said first position to said second position.
27. The drill bit of claim 22, said flow control member moving laterally with respect to said nozzle body to move from said first position to said second position.
28. The drill bit of claim 27, said flow control member including a ramp.
29. The drill bit of claim 27, said flow control member including a sliding ramp.
30. The drill bit of claim 27, said flow control member including a first ramp and a second ramp.
31. The drill bit of claim 27, said flow control member including a first sliding ramp and a second sliding ramp.
32. The drill bit of claim 22, said first position allowing fluid flow through said pressure relief nozzle and said second position not allowing fluid flow through said pressure relief nozzle.
33. The drill bit of claim 22, said first position defining a first diameter for said interior passage and said second position defining a second diameter for said interior passage, said first diameter being larger than said second diameter.
34. The drill bit of claim 22, said flow control member being repeatedly movable from said first position to said second position, and from said second position to said first position.
35. The drill bit of claim 22, said drill bit further comprising a second nozzle, said second nozzle having a hollow nozzle body with an upper end and a lower end connected by a flow path, there being a difference in fluid pressure between said upper end of said second nozzle and said lower end of said second nozzle, said flow path of said second nozzle having a constant flow area regardless of said pressure difference between said upper end of said second nozzle and said lower end of said second nozzle.

1. A marine propeller, comprising:
a propeller hub;
a plurality of propeller blades each having a leading blade face and a trailing blade face carried by said propeller hub; and
a reverse thrust cup provided in said trailing blade face of each of said plurality of propeller blades.
2. The marine propeller of claim 1 wherein said reverse thrust cup comprises a cup lip provided in said trailing blade face.
3. The marine propeller of claim 2 wherein said cup lip comprises a radial lip portion extending generally radially with respect to said propeller hub and an outer lip portion extending from said radial lip portion.
4. The marine propeller of claim 3 further comprising a generally convex cup surface extending from said cup lip.
5. The marine propeller of claim 3 further comprising a trailing cup edge extending from said outer lip portion.
6. The marine propeller of claim 3 further comprising a water flow path between said radial lip portion of said cup lip and said propeller hub.
7. The marine propeller of claim 6 wherein said radial lip portion comprises a tapered radial lip portion.
8. The marine propeller of claim 6 wherein said radial lip portion comprises a truncated radial lip portion.
9. A marine propeller, comprising:
a propeller hub;
a plurality of propeller blades each having a leading blade face, a trailing blade face, a leading blade edge, an outer blade edge and a trailing blade edge carried by said propeller hub; and
a reverse thrust cup provided in said trailing blade face of each of said plurality of propeller blades and bounded by said outer blade edge and said trailing blade edge.
10. The marine propeller of claim 9 wherein said reverse thrust cup comprises a cup lip provided in said trailing blade face and wherein said reverse thrust cup is further bounded by said cup lip.
11. The marine propeller of claim 10 further comprising a generally convex cup surface extending from said cup lip.
12. The marine propeller of claim 10 wherein said cup lip comprises a radial lip portion extending generally radially with respect to said propeller hub and an outer lip portion extending from said radial lip portion.
13. The marine propeller of claim 12 further comprising a trailing cup edge extending from said outer lip portion.
14. The marine propeller of claim 12 further comprising a water flow path between said radial lip portion of said cup lip and said propeller hub.
15. The marine propeller of claim 14 wherein said radial lip portion comprises a tapered radial lip portion.
16. The marine propeller of claim 14 wherein said radial lip portion comprises a truncated radial lip portion.
17. A marine propeller, comprising:
a propeller hub;
a plurality of propeller blades each having a leading blade face, a trailing blade face, a leading blade edge, an outer blade edge and a trailing blade edge carried by said propeller hub; and
a reverse thrust cup provided in said trailing blade face of each of said plurality of propeller blades; and
wherein said reverse thrust cup includes a cup lip having a radial lip portion generally parallel and spaced-apart with respect to said leading blade edge and an outer lip portion generally spaced-apart with respect to the outer blade edge, and a cup lip bounded by said cup lip, said outer blade edge and said trailing blade edge.
18. The marine propeller of claim 17 further comprising a water flow path between said radial lip portion of said cup lip and said propeller hub.
19. The marine propeller of claim 18 wherein said radial lip portion comprises a tapered radial lip portion.
20. The marine propeller of claim 18 wherein said radial lip portion comprises a truncated radial lip portion.

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. An inductive power transmitter for transmitting electrical power to a device by electromagnetic induction, the transmitter being configured to receive power conductively by way of a current via an electrical conduit from an external power source, the transmitter comprising:
a field generator configured to generate a fluctuating electromagnetic field having a fundamental frequency; and
at least one impedance element connected along an electrical path of the transmitter configured to carry said current, the impedance element or a combination of the impedance elements has a high enough impedance at the fundamental frequency such that, in use, electromagnetic noise experienced at the power source is substantially suppressed, such noise arising from coupling between the electromagnetic field and a circuit having said path and linking the power source to the transmitter.
2. A transmitter as claimed in claim 1, wherein:
said fundamental frequency is a first fundamental frequency;
said current has a second fundamental frequency different from said first fundamental frequency; and
the impedance element or the combination of the impedance elements has a low enough impedance at the second fundamental frequency such that said power is predominantly conveyed to the field generator without loss in that impedance.
3. A transmitter as claimed in claim 1, wherein said current is an AC current.
4. A transmitter as claimed in claim 1, wherein said power source is a mains power source.
5. A transmitter as claimed in claim 1, wherein the element comprises an inductor.
6. A transmitter as claimed in claim 1, further comprising a mains cable, wherein the impedance element or at least one of combination of impedance elements is part of the mains cable.
7. A transmitter as claimed in claim 6, wherein the transmitter has a main body, the mains cable extending externally therefrom when in use, and wherein the impedance element or at least one of the combination of impedance elements is located within the main body.
8. A transmitter as claimed in claim 6, wherein the mains cable is detachable from a part of the transmitter.
9. A transmitter as claimed in claim 1, configured such that the impedance element or at least one of the combination of impedance elements is shielded from said electromagnetic field.
10. A transmitter as claimed in claim 1, comprising two of the impedance elements, and wherein:
said current is carried along first and second connections; and
said elements are located along different said connections from one another or along the same connection as one another.
11. A transmitter as claimed in claim 1, comprising two of the impedance elements, and wherein:
the impedance elements each comprise an inductor; and
the inductors are configured to have opposite orientations relative to one another such that coupling from the field generator by way of the electromagnetic field to one said inductor cancels out such coupling to the other said inductor.
12. A transmitter as claimed in claim 6, wherein the inductors are arranged such that there is substantially no mutual coupling between them.
13. A transmitter as claimed in claim 12, further comprising a filter located between the mains cable and the field generating means and configured to substantially block frequency components at the fundamental frequency of the electromagnetic field.
14. A transmitter as claimed in claim 1, wherein the field generator comprises a coil and driving means operable to drive a fluctuating current through the coil, and wherein both ends of the coil are decoupled from the driving means such that in use a voltage level at each end of the coil fluctuates with time.
15. An electrical conduit configured to convey power conductively by way of a current from a power source to a field generator of an inductive power transmitter, the field generator being operable to generate a fluctuating electromagnetic field having a fundamental frequency for transmitting electrical power to a device by electromagnetic induction, the conduit comprising:
at least one impedance element connected along an electrical path of the conduit configured to carry said current, the impedance element or a combination of the impedance elements has a high enough impedance at the fundamental frequency such that, in use, electromagnetic noise experienced at the power source is substantially suppressed, such noise arising from coupling between the electromagnetic field and a circuit having said path and linking the power source to the transmitter.
16. A conduit as claimed in claim 15, wherein:
said fundamental frequency is a first fundamental frequency;
said current has a second fundamental frequency different from said first fundamental frequency; and
the impedance element or the combination of the impedance elements has a low enough impedance at the second fundamental frequency such that said power is predominantly conveyed to the field generator without loss in that impedance.
17. A conduit as claimed in claim 15, wherein the conduit is a mains cable.
18. Equipment for use in the vicinity of an inductive power transmitter, the transmitter being for transmitting electrical power to a device by electromagnetic induction and comprising a field generator configured to generate a fluctuating electromagnetic field having a fundamental frequency, the equipment being configured to receive power conductively by way of a current via an electrical conduit from an external power source, the equipment comprising:
at least one impedance element connected along an electrical path of the equipment configured to carry said current, the impedance element or a combination of the impedance elements having a high enough impedance at the fundamental frequency such that, in use, electromagnetic noise experienced at the power source is substantially suppressed, such noise arising from coupling between the electromagnetic field and a circuit having said path and linking the power source to the equipment.
19. A method of configuring an inductive power transmitter, the transmitter being for transmitting electrical power to a device by electromagnetic induction and being configured to receive power conductively via an electrical conduit by way of a current from an external power source, the transmitter comprising a field generator configured to generate a fluctuating electromagnetic field having a fundamental frequency, the method comprising:
connecting at least one impedance element along an electrical path of the transmitter configured to carry said current, the impedance element or a combination of the impedance elements having a high enough impedance at the fundamental frequency such that, in use, electromagnetic noise experienced at the power source is substantially suppressed, such noise arising from coupling between the electromagnetic field and a circuit having said path and linking the power source to the transmitter.