GB2556917A - Safety system and safety control method - Google Patents
Safety system and safety control method Download PDFInfo
- Publication number
- GB2556917A GB2556917A GB1619988.7A GB201619988A GB2556917A GB 2556917 A GB2556917 A GB 2556917A GB 201619988 A GB201619988 A GB 201619988A GB 2556917 A GB2556917 A GB 2556917A
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- GB
- United Kingdom
- Prior art keywords
- operation state
- control unit
- sensor unit
- user
- safety
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
- F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
- F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- User Interface Of Digital Computer (AREA)
Abstract
A safety system comprises a sensor unit 2 configured to be worn by a user while the user is operating an apparatus 6. A control unit 4 is in communication with the sensor unit. The control unit changes an operation state of the apparatus from a normal operation state to a safety operation state in response to detection of a characteristic acceleration profile of the sensor unit by the sensor unit (for example, the user flinching). The apparatus may comprise one or more accelerometers. The sensor unit may comprise a wrist strap, or a headband, hat or eyewear such as glasses or goggles and may respond to when the sensor reaches an acceleration threshold. The apparatus may comprise a power tool, a fixed industrial machine such as a lathe, drill, saw, food processor or welder.
Description
(54) Title of the Invention: Safety system and safety control method
Abstract Title: Safety system for activating a safety state in response to acceleration profile (57) A safety system comprises a sensor unit 2 configured to be worn by a user while the user is operating an apparatus 6. A control unit 4 is in communication with the sensor unit. The control unit changes an operation state of the apparatus from a normal operation state to a safety operation state in response to detection of a characteristic acceleration profile of the sensor unit by the sensor unit (for example, the user flinching). The apparatus may comprise one or more accelerometers. The sensor unit may comprise a wrist strap, or a headband, hat or eyewear such as glasses or goggles and may respond to when the sensor reaches an acceleration threshold. The apparatus may comprise a power tool, a fixed industrial machine such as a lathe, drill, saw, food processor or welder.
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SAFETY SYSTEM AND SAFETY CONTROL METHOD
The present invention relates to a safety device that reduces the risk of injury to a user in the event of an unexpected occurrence when operating potentially dangerous apparatus, such as powered machinery.
Emergency power cut-off switches are known in the art. For example, fixed industrial machines such as lathes, boring machines, milling machines, grinding machines, etc. have power cutoff switches that can be operated manually in the event of an emergency. Such switches are typically coloured red or otherwise clearly labelled, and are positioned in easy to reach locations. Although it is possible to reach such switches in many emergency situations, there can be an undesirable delay before the switch is reached, potentially increasing the risk or extent of injury or other adverse outcome.
Some emergencies result in electrical shorts (e.g. accidentally cutting through a power cable) or other unexpected changes in the electrical properties of a device. Such changes can be detected electrically and used to trigger a safety response, such as cutting off a power supply. However, not all emergency situations cause changes in electrical properties that can be detected in this way.
US7401131B2 discloses a power tool movement monitoring system that is capable of generating a warning signal, or of cutting off power, when the monitored acceleration or velocity of a power tool exceeds a predetermined acceleration or velocity limit for a respective axis. The monitoring system thus allows uncontrolled operation of the power tool to be detected and uses the detection to trigger a safety response (warning or power cut off). The system improves safety but has limited sensitivity in many situations. The inertia of the power tool limits how much acceleration can be applied to the power tool by the user, which reduces sensitivity of detection of dangerous situations. Some dangerous situations may be not be detected quickly enough to prevent injury or may not be detected at all. The approach is also not applicable to stationary devices, such as the fixed industrial machines mentioned above.
It is an object of the present invention to at least partially address one or more of the problems with the prior art mentioned above.
According to an aspect of the invention, there is provided a safety system, comprising: a sensor unit configured to be worn by a user while the user is operating an apparatus; and a control unit in communication with the sensor unit, wherein: the control unit is configured to change an operation state of the apparatus from a normal operation state to a safety operation state in response to detection of a characteristic acceleration profile of the sensor unit by the sensor unit.
Thus, an arrangement is provided in which acceleration of a part of the anatomy of a user of potentially dangerous apparatus is monitored directly, rather than the apparatus itself, in order to switch the apparatus to a safety operation state in response to an emergency situation. In contrast to systems such as that disclosed in US7401131B1 discussed above, the present invention is able to provide protection when working with a variety of different apparatus, without fundamental modification of the safety system. Furthermore, the inventor has found that monitoring the anatomy of the user directly provides greater sensitivity to characteristic indicators of an emergency situation, such as flinch reflex. The invention is thus able to respond more quickly and/or reliably to emergencies than prior art systems.
In an embodiment, the safety system is configured to allow a user to adjust the characteristic acceleration profile. This allows a user to adjust a sensitivity of the safety device, for example so as to be appropriate for the particular activities the user has planned and/or to be appropriate to the location of the sensor unit. The user can thereby achieve a high level of protection while minimising the risk of false positive events (where the safety system causes the apparatus to enter the safety operation state when it is not necessary).
In an embodiment, the sensor unit is configured to allow a user to indicate where the sensor unit is being worn and the control unit is configured to select a characteristic acceleration profile as a function of where the sensor unit is being worn. The safety system is thus able to be used flexibly (e.g. attached to garments in various locations) without having excessively high or low sensitivity to relevant events (such as flinch reflexes) and without significantly compromising convenience.
In an embodiment, the control unit is configured to change the operation state of the apparatus from the normal operation state to the safety operation state by cutting off power to at least a portion of the apparatus. The control unit may for example act as a power relay between a power source and the apparatus, the control unit allowing power to pass through the control unit when the characteristic acceleration profile has not been detected and to not allow power to pass though the control unit when the characteristic acceleration profile has been detected. Embodiments of this type can easily be applied to controlling safety of a wide variety of apparatus simply by connecting the control unit between a power source and the apparatus.
In one particular embodiment of this type the control unit comprises a control unit socket and a control unit plug; the control unit plug is configured to engage with a power socket; and the control unit socket has the same form as the power socket. Thus, the control unit can simply be plugged into a standard power socket and any apparatus connected to the control unit socket will function in the same way as if it were connected directly to the standard power socket except that in the event that the characteristic acceleration profile is detected (e.g. due to a flinch reflex from a user), the control unit will cause the apparatus to enter the safety operation state (e.g. by cutting power to the device).
In an aspect of the invention, there is provided a safety control method, comprising: using a sensor unit worn by a user to monitor a condition of the user while the user is operating an apparatus; and changing an operation state of the apparatus from a normal operation state to a safety operation state in response to detection by the sensor unit of a characteristic acceleration profile of the sensor unit.
Embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings in which corresponding reference symbols indicate corresponding parts, and in which:
Figure 1 schematically depicts a safety system according to an embodiment;
Figure 2 schematically depicts an example control unit of the safety system of Figure 1;
Figure 3 is a front perspective view of a control unit of the type depicted in Figure 2 configured to engage with a power socket;
Figure 4 is a rear perspective view of the control unit of Figure 3; and
Figure 5 depicts a sensor unit of a safety system configured to be worn on a user’s wrist.
Embodiments of a safety system are described below.
According to various embodiments, one example of which is depicted in Figure 1, the safety system comprises a sensor unit 2. The sensor unit 2 is configured to be worn by a user while the user is operating an apparatus 6. The sensor unit 2 may for example form part of, or be configured to be attached to, a garment 8 that can be worn by a user.
The sensor unit 2 can be configured to be worn in various ways. The sensor unit 2 can be configured to be worn on the head, for example as a headband, hat, or eyewear such as glasses or goggles. Figure 1 depicts an embodiment of this type, in which the sensor unit 2 is attached to a garment 8 consisting of a pair of glasses. In other embodiments the sensor unit 2 is configured to be worn on the wrist of a user. Figure 5 depicts an embodiment of this type, in which the sensor unit 2 comprises a wrist strap. The sensor unit 2 thus forms part of a garment 8 configured to be worn on the wrist, in the manner of a watch. The sensor unit 2 may be provided by a suitably programmed smart watch, for example, or may be attached to a watch, a watch strap, or a bracelet.
In an embodiment, the sensor unit 2 comprises one or more accelerometers. In an embodiment, the sensor unit 2 comprises an accelerometer unit 28, as depicted schematically in Figure 5, comprising plural accelerometers that simultaneously provide information about acceleration along each of three mutually orthogonal axes. The accelerometer unit 28 is thus able to determine a magnitude of acceleration in any direction. A flinch reflex causing an abrupt acceleration in any direction can thus be detected. The device can also be attached to the user in any orientation.
The safety system can be used in conjunction with a wide range of different types of apparatus 6. Non-limiting examples include: a power tool (including a hand held power tool), a fixed industrial machine, a lathe, a boring machine, a milling machine, a grinding machine (both hand held and bench mounted), a plane, a router, a sander, a drill (hand held or heavy industrial), a saw (including hand held tools such as hand held jigsaws and chop saws, and fixed appliances such as band saws and circular saws), a printing press, an arc welder, a machine in an automated production environment (e.g. robotics apparatus or arrangements involving powered conveyor belts), a food sheer (e.g. for meats or cheeses), and a food processor (e.g. for mixing, mincing or grinding food). The safety system can be used with apparatus 6 that is configured to be stationary in use (e.g. apparatus 6 that is fixed to the floor or too heavy to lift) or with apparatus 6 that is configured to be portable (such as a portable hand tool).
As depicted in Figure 1, the safety system further comprises a control unit 4. The control unit 4 is in communication with the sensor unit 2 (e.g. via a wireless data connection, indicated by the broken line connection in Figure 1). The control unit 4 is configured to change an operation state of the apparatus 6 from a normal operation state to a safety operation state in response to detection of a characteristic acceleration profile of the sensor unit 2 by the sensor unit 2. The change in the operation state of the apparatus 6 is not particularly limited and will depend on the particular characteristics of the apparatus 6 being controlled. In various embodiments, the change in the operation state ofthe apparatus 6 comprises one or more ofthe following: cutting power to the apparatus, reducing the speed of a moving component, stopping a moving component, closing a valve (e.g. where a valve provides a potentially dangerous flow), shielding a component of the apparatus from the user. The change in the operation state 6 may be triggered by the control unit 4 sending a suitable signal to the apparatus 6 or, alternatively, the control unit 4 may be configured to take more direct action such as cutting off a power supply connection directly.
Figure 1 depicts an embodiment in which the control unit 4 is configured to change the operation state of the apparatus from the normal operation state to the safety operation state by cutting off power to at least a portion of the apparatus 6. This functionality is achieved in the particular embodiment shown by arranging for the control unit 4 to act as a power relay between a power source 10 and the apparatus 6. The control unit 4 allows power to pass through the control unit 4 to the apparatus 6 (arrows 21 and 22) in the normal operation state of the apparatus 6 (when the characteristic acceleration profile has not been detected) and does not allow power to pass through the control unit 4 to the apparatus 6 in the safety operation state of the apparatus 6 (when the characteristic acceleration profile has been detected).
Figures 2-4 depict an example configuration for the control unit 4. Figure 2 schematically depicts components of the control unit 4 and their interconnections. Figures 3 and 4 indicate how an example control unit 4 might look from the exterior.
The control unit 4 comprises a control unit socket 24 and a control unit plug 26. The control unit plug 26 is configured to engage with a power socket. The control unit socket 24 has the same form as the power socket. Figures 3 and 4 depict a control unit 4 configured to engage with a domestic UK power socket, but it will be understood that the concept is applicable to any type of domestic or industrial power socket or power connection.
The control unit 4 shown comprises a processing unit 12, a user interface 14, a display 16, a communications module 18, and a power interruption module 20. The user interface 14 may for example comprise a reset switch allowing a user to reset the safety system after the safety system has switched the apparatus 6 into the safety operation state. Alternatively or additionally the user interface 14 may be configured to allow a user to modify control settings of the safety system, such as a sensitivity setting (see below). The user interface 14 provides a control signal to the processing unit 12. The display 16 displays information to the user. The information may for example indicate whether the safety system is turned on, what a battery level of the safety system is (if applicable), or a state of connection (e.g. signal strength) between the control unit 4 and the sensor unit 2 (if applicable). A communications module 18 handles communications between the control unit 4 and the sensor unit 2, and between the control unit 4 and any other device which may be configured to communicate with the control unit 4 (e.g. a remote computer). The power interruption module 20 controls a power connection being relayed by the control unit 4 (arrows 21 and 22). The processing unit 12 controls the power interruption module 20. In the embodiment shown, the power interruption module 20 cuts the power connection to the apparatus 6 in response to detection of the characteristic acceleration profile by the sensor unit 2.
In various embodiments the characteristic acceleration profile is characteristic of a flinch reflex by the user. In such embodiments, and in other embodiments, the detection of the characteristic acceleration profile comprises detecting when a magnitude of the acceleration of the sensor unit 2 exceeds a reference acceleration threshold. A characteristic common to many flinch reflexes is an abrupt movement involving a large acceleration for a short period of time. The accelerations involved in such abrupt movements are significantly higher than accelerations encountered during normal smooth operation of apparatuses in many circumstances. Monitoring for exceedance of a reference acceleration threshold thus provides a simple and reliable way to distinguish flinch reflex movements from movements associated with normal, safe operation.
In an embodiment the reference acceleration threshold is fixed. The reference acceleration threshold may thus be set at the factory when the safety system is manufactured. This approach minimises cost and complexity.
In other embodiments, the reference acceleration threshold (and, more generally, the characteristic acceleration profile) can be adjusted by a user. Adjustment of the reference acceleration threshold effectively allows the sensitivity of the safety system to be adjusted. Thus, the safety system can be configured to switch the apparatus 6 to the safety operation state at lower or higher accelerations of the sensor unit. A user can thus adjust the safety device to provide a protection that is appropriate to the particular activity that is envisaged (e.g. for a vigorous activity the user may decide to lower the sensitivity of the safety device to avoid erroneous switching of the apparatus to the safety operation state).
In an embodiment, the sensor unit 4 allows a user to indicate where the sensor unit 4 is being worn. The control unit 4 then selects a characteristic acceleration profile as a function of where the sensor unit 4 is being worn (e.g. by selected a most appropriate one of a plurality of predefined different characteristic acceleration profiles). The inventor has recognised that the acceleration profile characteristic of a flinch reflex will be different for different parts of the body (e.g. smaller for parts of the body that are less easily moved in an abrupt fashion, or which tend to participate less in flinch reflex reactions). The safety system is thus able to be used flexibly (e.g. attached to garments in various locations) without having excessively high or low sensitivity to flinch reflexes and without significantly compromising convenience. A user simply needs to indicate where the sensor is being worn and the safety system will adjust the acceleration threshold to provide effective protection.
In an embodiment, the control unit 4 is configured to monitor a data connection (e.g. a wireless data connection) between the control unit 4 and the sensor unit 2 and change the operation of the apparatus 6 from the normal operation state to the safety operation state in response to detection of an interruption to the data connection or in response to detection of an interruption to the data connection that persists for longer than a predetermined interruption threshold time. In this way, the control unit 4 can avoid the potentially dangerous situation in which a data connection is lost without a user of an apparatus 6 realising, such that use of the apparatus 6 would be continued without protection. A data connection could be lost for various reasons, including for example where a user moves (with the sensor unit 2) out of range of the control unit 4, where a battery in the sensor unit 2 has failed, or where there is a hardware failure. The predetermined interruption threshold time may take various values depending on the specific situation and details of the apparatus 6. The control unit 4 may also be configured so that the predetermined interruption threshold time can be adjusted according to user preference. In an embodiment, the predetermined interruption threshold time is in the range ls-60s, optionally in the range 5s-40s.
In an embodiment, control unit 4 changes the operation state of the apparatus 6 from the normal operation state to the safety operation state in response to detection of an absence of any change in acceleration for longer than a predetermined inactivity threshold time. In this way, the control unit 4 can detect when a user may have taken off the sensor unit 2, or where the sensor unit 2 may have fallen off without the user realising, but where the user is still operating the apparatus 6 (unprotected). The control unit 4 can also switch the apparatus 6 into the safe state in the event that a user has lost consciousness. The predetermined inactivity threshold may take various values depending on the specific situation and/or details of the apparatus 6. The control unit 4 may also be configured so that the predetermined inactivity threshold time can be adjusted according to user preference. In an embodiment, the predetermined inactivity threshold time is in the range ls-60s, optionally in the range 5s-40s.
Claims (23)
1. A safety system, comprising:
a sensor unit configured to be worn by a user while the user is operating an apparatus; and a control unit in communication with the sensor unit, wherein:
the control unit is configured to change an operation state of the apparatus from a normal operation state to a safety operation state in response to detection of a characteristic acceleration profde of the sensor unit by the sensor unit.
2. The system of claim 1, wherein the characteristic acceleration profile is characteristic of a flinch reflex by the user.
3. The system of claim 1 or 2, wherein the detection of the characteristic acceleration profile comprises detecting when a magnitude of the acceleration of the sensor unit exceeds a reference acceleration threshold.
4. The system of claim 3, wherein the reference acceleration threshold is fixed.
5. The system of claim 3, wherein the control unit is configured to allow adjustment of the reference acceleration threshold, thereby allowing a sensitivity of the safety system to be adjusted.
6. The system of any preceding claim, wherein sensor unit is configured to allow a user to indicate where the sensor unit is being worn and the control unit is configured to select a characteristic acceleration profile as a function of where the sensor unit is being worn.
7. The system of any preceding claim, wherein the sensor unit comprises one or more accelerometers.
8. The system of any preceding claim, wherein the control unit is configured to change the operation state of the apparatus from the normal operation state to the safety operation state by cutting off power to at least a portion of the apparatus.
9. The system of claim 8, wherein the control unit is configured to:
allow power to pass through the control unit from a power source to the apparatus when the characteristic acceleration profile has not been detected; and not to allow power to pass though the control unit from a power source to the apparatus when the characteristic acceleration profile has been detected.
The system of claim 8 or 9, wherein:
the control unit comprises a control unit socket and a control unit plug; the control unit plug is configured to engage with a power socket; and the control unit socket has the same form as the power socket.
11. The system of any preceding claim, wherein the control unit is configured to communicate via a wireless data connection to the sensor unit.
12. The system of any preceding claim, wherein the control unit is configured to monitor a data connection between the control unit and the sensor unit and change the operation of the apparatus from the normal operation state to the safety operation state in response to detection of an interruption to the data connection or in response to detection of an interruption to the data connection that persists for longer than a predetermined interruption threshold time.
13. The system of any preceding claim, wherein the control unit is configured to change the operation state of the apparatus from the normal operation state to the safety operation state in response to detection of an absence of any change in acceleration for longer than a predetermined inactivity threshold time.
14. The system of any preceding claim, wherein the change in the operation state of the apparatus comprises one or more of the following: cutting power to the apparatus, reducing the speed of a moving component of the apparatus, stopping a moving component of the apparatus, closing a valve in the apparatus, shielding a component of the apparatus from the user.
15. The system of any preceding claim, wherein the sensor unit is configured to be worn by a user on the wrist, the sensor unit optionally comprising a wrist strap.
16. The system of any preceding claim, wherein the sensor unit is configured to be worn by a user on the head, the sensor unit optionally comprising a headband, hat, or eyewear such as glasses or goggles.
17. The system of any preceding claim, wherein the apparatus comprises one or more of the following: a power tool, a fixed industrial machine, a lathe, a boring machine, a milling machine, a grinding machine, a plane, a router, a sander, a drill, a saw, a printing press, an arc welder, a machine in an automated production environment, a food sheer, and a food processor.
The system of any preceding claim, further comprising the apparatus.
19. A safety control method, comprising:
using a sensor unit worn by a user to monitor a condition of the user while the user is operating an apparatus; and changing an operation state of the apparatus from a normal operation state to a safety operation state in response to detection by the sensor unit of a characteristic acceleration profile of the sensor unit.
20. The method of claim 19, wherein the characteristic acceleration profile is characteristic of a flinch reflex by the user.
21. The method of claim 19 or 20, wherein the detection of the characteristic acceleration profile comprises detecting when a magnitude of the acceleration of the sensor unit exceeds a reference acceleration threshold.
22. The method of any of claims 19-21, wherein the operation state of the apparatus is changed from the normal operation state to the safety operation state by cutting off power to at least a portion of the apparatus.
23. The method of any of claims 19-22, wherein the control unit communicates via a wireless connection to the sensor unit.
24. The method of any of claims 19-23, further comprising monitoring a data connection between the control unit and the sensor unit and changing the operation of the apparatus from the normal operation state to the safety operation state in response to detection of an interruption to the data connection or in response to detection of an interruption to the data connection that persists for longer than a predetermined interruption threshold time.
25. The method of any of claims 19-24, further comprising changing the operation state of the apparatus from the normal operation state to the safety operation state in response to detection of an absence of any change in acceleration for longer than a predetermined inactivity threshold time.
Intellectual
Property
Office
Application No: GB1619988.7 Examiner: Jonathan Huws
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1619988.7A GB2556917A (en) | 2016-11-25 | 2016-11-25 | Safety system and safety control method |
| PCT/GB2017/053511 WO2018096330A1 (en) | 2016-11-25 | 2017-11-22 | Safety system and safety control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1619988.7A GB2556917A (en) | 2016-11-25 | 2016-11-25 | Safety system and safety control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201619988D0 GB201619988D0 (en) | 2017-01-11 |
| GB2556917A true GB2556917A (en) | 2018-06-13 |
Family
ID=58073199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1619988.7A Withdrawn GB2556917A (en) | 2016-11-25 | 2016-11-25 | Safety system and safety control method |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2556917A (en) |
| WO (1) | WO2018096330A1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120279742A1 (en) * | 2009-10-23 | 2012-11-08 | Robert Bosch Gmbh | Hand-Held Power Tool |
| US20130135097A1 (en) * | 2010-07-29 | 2013-05-30 | J&M I.P. Holding Company, Llc | Fall-Responsive Emergency Device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140166323A1 (en) * | 2012-09-16 | 2014-06-19 | J. Carl Cooper | Kickback Reduction for Power Tools and Machines |
| DE102013221128A1 (en) * | 2013-10-17 | 2015-04-23 | Robert Bosch Gmbh | Device for protection against injury to an operator by a machine tool and method for this purpose |
| US9293023B2 (en) * | 2014-03-18 | 2016-03-22 | Jack Ke Zhang | Techniques for emergency detection and emergency alert messaging |
-
2016
- 2016-11-25 GB GB1619988.7A patent/GB2556917A/en not_active Withdrawn
-
2017
- 2017-11-22 WO PCT/GB2017/053511 patent/WO2018096330A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120279742A1 (en) * | 2009-10-23 | 2012-11-08 | Robert Bosch Gmbh | Hand-Held Power Tool |
| US20130135097A1 (en) * | 2010-07-29 | 2013-05-30 | J&M I.P. Holding Company, Llc | Fall-Responsive Emergency Device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018096330A1 (en) | 2018-05-31 |
| GB201619988D0 (en) | 2017-01-11 |
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| Date | Code | Title | Description |
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| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |