1-30. (canceled)
31. A calibrating breathalyzer, comprising:
an alcohol sensor for receiving a breath air sample and measuring percent blood alcohol concentration (BAC %) based on analysis of the breath sample;
a non-volatile memory for storing calibration data of the alcohol sensor comprising one or more reference points;
a processing unit for operating the breathalyzer in two modes: (A) a calibration mode to calibrate the breathalyzer using a user’s body as a simulator by receiving a BAC % measurement from the alcohol sensor based on the breath sample provided by a user at a sample time to provide a reference point, the sample time determined based on a user’s metabolism rate; and storing the reference point; and (B) an operation mode to provide a BAC % reading based on the BAC % measurement by the alcohol sensor and the calibration data stored in the non-volatile memory;
a display for displaying the BAC % reading and other information to a user; and
a housing to house the processing unit, the alcohol sensor, the non-volatile memory and the display.
32. The calibrating breathalyzer of claim 31, further comprising an input device for receiving information about type and amount of alcohol consumed by the user, and a drinking start time; wherein the processing unit provides a list of alcohol types on the display for selection by the user using the input device and stores the selection of the user in the non-volatile memory; and wherein the processing unit determines a maximum alcohol level from the type and amount of alcohol consumed by the user, and determines the user’s metabolism rate based on the maximum alcohol level and BAC % measurement over a predetermined period of time.
33. The calibrating breathalyzer of claim 32, wherein the processing unit alerts the user at a predetermined time before the sample time to provide the breath sample for calibrating the breathalyzer by an alarm or a message on the display; and wherein the processing unit receives BAC % measurements from the alcohol sensor based on the breath samples provided by the user at a predetermined interval until a statistically significant number of measurements are obtained to determine the user’s metabolism rate.
34. The calibrating breathalyzer of claim 32, wherein the processing unit determines the sample time to receive the breath sample from the user based on a time to a predetermined calibration point from the drinking start time calculate using the user’s metabolism rate and the maximum alcohol level; and wherein the processing unit modifies the sample time by a predetermined lag time for alcohol to be present in user’s circulatory system after alcohol consumption by the user.
35. The calibrating breathalyzer of claim 31, wherein the breathalyzer is one of the following: a portable breathalyzer, a coin-operated breathalyzer, a key-chain breathalyzer, or a car ignition breathalyzer.
36. The calibrating breathalyzer of claim 31, wherein the breathalyzer is one of a following processor based device: a tablet, a laptop, a personal computer, a cell phone, a GPS navigation device, a digital camera or a personal digital assistant.
37. The calibrating breathalyzer of claim 36, further comprising an external alcohol testing unit comprising the alcohol sensor and at least one of the following: a communications unit to wirelessly communicate BAC % measurement to the processing unit of the processor based device or a USB connector to communicate with the processing unit via a USB port of the processor based device.
38. Apparatus for calibrating a breathalyzer using a user’s body as a simulator, comprising:
a processor for receiving a percent blood alcohol concentration (BAC %) measurement from the alcohol sensor based on the breath sample provided by the user at a sample time to provide a reference point, the sample time determined based on a user’s metabolism rate;
a memory for storing the reference point; and
a display for displaying the reference point to be inputted by the user as a calibration data into the breathalyzer.
39. The apparatus of claim 38, further comprising an input device for receiving information about type and amount of alcohol consumed by the user, and a drinking start time; and wherein the processor provides a list of alcohol types on the display for selection by the user using the input device, stores the selection of the user in the memory, determines a maximum alcohol level from the type and amount of alcohol consumed by the user, and determines the user’s metabolism rate based on the maximum alcohol level and BAC % measurement taken by the breathalyzer over a predetermined period of time.
40. The apparatus of claim 39, wherein the processor alerts the user at a predetermined time before the sample time to provide the breath sample to the breathalyzer by an alarm or a message on the display; and wherein the input device receives BAC % measurements of the breath samples provided to the breathalyzer by the user at a predetermined interval until a statistically significant number of measurements are obtained to determine the user’s metabolism rate.
41. The apparatus of claim 40, further comprising a communications unit to provide a wired or wireless communication with the breathalyzer; and wherein the processor receives BAC % measurements from the breathalyzer via the communications unit
42. The apparatus of claim 39, wherein the processor determines the sample time to receive the breath sample from the user based on a time to a predetermined calibration point from the drinking start time calculate using the user’s metabolism rate and the maximum alcohol level; and wherein the processor modifies the sample time by a predetermined lag time for alcohol to be present in user’s circulatory system after alcohol consumption by the user.
43. The apparatus of claim 38, wherein the apparatus is one of a following processor based device: a tablet, a laptop, a personal computer, a cell phone, a GPS navigation device, a digital camera or a personal digital assistant.
44. The apparatus of claim 38, further comprising a web server comprising the processor and the memory; a web-enabled client device comprising an input device to receive information from the user and the display; and wherein the web-enabled client device is used to access the web server over the Internet to calibrate the breathalyzer.
45. The apparatus of claim 44, wherein the web-enabled client device is one of a following processor based device: a tablet, a laptop, a personal computer, a cell phone, a GPS navigation device, a digital camera or a personal digital assistant.
46. The apparatus of claim 38, further comprising a web server comprising the processor; a web-enabled client device comprising an input device to receive information from the user, the memory and the display; and wherein the web-enabled client device is used to access the web server over the Internet to calibrate the breathalyzer.
47. The apparatus of claim 46, wherein the web-enabled client device is one of a following processor based device: a tablet, a laptop, a personal computer, a cell phone, a GPS navigation device, a digital camera or a personal digital assistant.
48. A computer based method for calibrating of a breathalyzer using a user’s body as a simulator, comprising the steps of:
determining by a processor based device a sample time to receive a breath sample by the breathalyzer from the user based a user’s metabolism rate;
receiving by the processor based device a percent blood alcohol concentration (BAC %) measurement taken by the breathalyzer based on the breath sample provided by the user at a sample time to provide a reference point;
storing the reference point in a memory of the processor based device; and
displaying the reference point to be inputted by the user as a calibration data into the breathalyzer.
49. The method of claim 48, further comprising the steps of:
receiving information regarding type and amount of alcohol consumed by the user, and a drinking start time by a processor based device;
determining a maximum alcohol level from the type and amount of the alcohol consumed by the user by the processor based device;
determining the metabolism rate of the user based on the maximum alcohol level and a series of BAC % measurements of the user’s breath samples taken by the breathalyzer over a predetermined period of time; and
alerting the user to provide the breath sample to the breathalyzer at a predetermined interval by an alarm or a message on the display of the processor based device until a statistically significant number of measurements are obtained to determine the metabolism rate of the user.
50. The method of claim 49, further comprising the step of determining a sample time to receive a breath sample by the breathalyzer from the user based on a time to a predetermined calibration point from the drinking start time calculated by the processor based device using the user’s metabolism rate and the maximum alcohol level.
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 ground engaging tool, comprising:
a tool exterior surface defining a front edge;
a rear surface substantially opposite the front edge; and
an interior cavity opening through the rear surface, the interior cavity including:
a lock opening leading from the interior cavity to the tool exterior surface, the lock opening including a conically shaped surface portion; and
a slot recessed from the interior cavity, the slot including one end open to the rear surface and an opposite end open to the lock opening, wherein the slot includes a bottom wall and opposed sidewalls; and
wherein the conically shaped surface portion extends into the lock opening closer to the exterior surface than the bottom wall of the slot.
2. The ground engaging tool of claim 1, comprising a top portion, a bottom portion, and opposed side portions extending between the top portion and the bottom portion, wherein the top portion, bottom portion, and side portions form the tool exterior surface.
3. The ground engaging tool of claim 2, in which the top portion, bottom portion, and side portions converge to form the front edge.
4. The ground engaging tool of claim 2, in which the lock opening is formed in a selected one of the side portions.
5. The ground engaging tool of claim 1, in which the lock opening has a noncircular shape.
6. The ground engaging tool of claim 1, in which at least a portion of a surface of the lock opening defines a circumferential valley substantially about a center of the lock opening.
7. The ground engaging tool of claim 1, in which the slot extends along a longitudinal axis.
8. The ground engaging tool of claim 7, in which the side walls and the bottom wall of the slot define a plane of symmetry extending parallel to the longitudinal axis of the slot.
9. The ground engaging tool of claim 8, in which the longitudinal axis of the slot runs from the rear surface to the lock opening.
10. The ground engaging tool of claim 7, in which the work tool defines a direction of movement along which the ground engaging tool travels during insertion onto and removal from the work tool, and in which the longitudinal axis of the slot is parallel to the direction of movement.
11. The ground engaging tool of claim 1, in which the ground engaging tool is a tip.
12. The ground engaging tool of claim 1, further comprising an eyelet attached to the tool exterior surface.
13. A ground engaging tool, comprising:
a top portion, a bottom portion, and opposed side portions extending between the top portion and the side portion, the top portion, bottom portion, and side portions forming a tool exterior surface having a front edge;
a rear surface substantially opposite the front edge; and
an interior cavity opening through the rear surface, the interior cavity including:
a lock opening formed in at least one of the side portions, the lock opening being recessed from the interior cavity and leading to the tool exterior surface, wherein at least a portion of a surface of the lock opening defines a circumferential valley substantially about a central axis of the lock opening; and
a slot recessed from the interior cavity, the slot including one end open to the rear surface and an opposite end open to the lock opening.
14. The ground engaging tool of claim 13, in which the slot comprises a bottom wall and opposed sidewalls extending away from the interior cavity toward the bottom wall, so that the bottom wall is recessed from the interior cavity.
15. The ground engaging tool of claim 13, in which at least a portion of the surface of the lock opening has a conical shape.
16. A ground engaging tool, comprising:
a tool exterior surface defining a front edge;
a rear surface substantially opposite the front edge; and
an interior cavity opening through the rear surface, the interior cavity including:
a lock opening recessed from the interior cavity and having a conically shaped surface portion configured to mate with a conically shaped exterior surface portion of a retainer bushing, the lock opening leading from the interior cavity to the tool exterior surface; and
a slot recessed from the interior cavity, the slot including one end open to the rear surface and an opposite end open to the lock opening.
17. The ground engaging tool of claim 16, in which the slot comprises a bottom wall and opposed sidewalls extending away from the interior cavity toward the bottom wall, so that the bottom wall is recessed from the interior cavity.