US5477211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ambulatory aid warning device
Assignee: Individual
•
Filing: 1994-10-19
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Granted: 1995-12-19
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Expires: 2014-10-19
Abstract
Abstract An ambulation aid warning device for warning the uses when an ambulation aid is about to be used improperly. The device includes one or more gravity sensitive switches to activate an auditory, visual and/or sensory alarm when the ambulation aid is tilted beyond a specified angle.
Inventors
- 👤 Jeffrey J. Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:49
CPC Classifications
A; A61; A61G; A61G7/00; A61G7/10; A61G7/1063; A61G7/1065; A61G5/00; A61G5/10; A61H; A61H3/00; A61G7/1038
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
115 words
An ambulation aid warning device for alerting a user when the ambulation aid is tilted beyond a specified angle for proper use, comprising: a case for attachment to an ambulation aid; a power source attached to the case; one or more gravity sensitive switches attached to the case whereby gravity causes at least one switch to close when the ambulation aid is tilted beyond a specified angle for proper use; a warning indicator; and an electrical circuit connecting the power source, the gravity switch(es)and the warning indicator for activating the warning indicator when one or more of the gravity switches are in a closed position thereby alerting the user so improper use will not occur.
Claim 2
Dependent Claim
115 words
An ambulation aid warning device for alerting a user when the ambulation aid is tilted beyond a specified angle for proper use, comprising: a case for attachment to an ambulation aid; a power source attached to the case; one or more gravity sensitive switches attached to the case whereby gravity causes at least one switch to close when the ambulation aid is tilted beyond a specified angle for proper use; a warning indicator; and an electrical circuit connecting the power source, the gravity switch(es)and the warning indicator for activating the warning indicator when one or more of the gravity switches are in a closed position thereby alerting the user so improper use will not occur.
Claim 3
Dependent Claim
14 words
The warning device of claim 1 wherein the gravity sensitive switch(es) are mercury switches.
Claim 4
Dependent Claim
104 words
The warning device of claim 1 wherein the gravity sensitive switches are baffled mercury switches comprising: a container having a first end and a second end; electrical contacts extending into the first end of the container; mercury placed in the container so it may flow from one end of the container to the other, for electrically connecting the electrical contacts when the mercury is in the first end of the container; and one or more baffles between the first end and the second end of the container for baffling the flow of mercury from the first end to the second end of the container.
Claim 5
Dependent Claim
29 words
The warning device of claim 3 wherein the baffle comprises a disk attached to the container and wherein the disk has apertures therein for the mercury to flow through.
Claim 6
Dependent Claim
13 words
The warning device of claim 1 wherein the warning indicator comprises a buzzer.
Claim 7
Dependent Claim
13 words
The warning device of claim 1 wherein the warning indicator comprises a light.
Claim 8
Dependent Claim
18 words
The warning device of claim 1 wherein the warning indicator comprises a vibrator attached to the ambulation aid.
Claim 9
Dependent Claim
20 words
The warning device of claim 1 further comprising an on/off switch connected to the electrical circuit for breaking the circuit.
Claim 10
Dependent Claim
117 words
An ambulation aid having a warning device for alerting a user when the ambulation aid is tilted beyond a specified angle for proper use, comprising: a power source attached to the ambulation aid; one or more gravity sensitive switches attached to the ambulation aid whereby gravity causes at least one switch to close when the ambulation aid is tilted beyond a specified angle for proper use a warning indicator attached to the ambulation aid; and an electrical circuit connecting the power source, the gravity switch(es) and the warning indicator for activating the warning indicator when one or more of the gravity switches are in a closed position thereby alerting the user so improper use will not occur.
Claim 11
Dependent Claim
117 words
An ambulation aid having a warning device for alerting a user when the ambulation aid is tilted beyond a specified angle for proper use, comprising: a power source attached to the ambulation aid; one or more gravity sensitive switches attached to the ambulation aid whereby gravity causes at least one switch to close when the ambulation aid is tilted beyond a specified angle for proper use a warning indicator attached to the ambulation aid; and an electrical circuit connecting the power source, the gravity switch(es) and the warning indicator for activating the warning indicator when one or more of the gravity switches are in a closed position thereby alerting the user so improper use will not occur.
Claim 12
Dependent Claim
14 words
The ambulation aid of claim 9 wherein the gravity sensitive switch(es) are mercury switches.
Claim 13
Dependent Claim
100 words
The ambulation of claim 9 wherein the gravity sensitive switches are baffled mercury switches comprising: a container having a first end and a second end; electrical contacts extending into the first end of the container; mercury placed in the container so it may flow from one end of the container to the other, for electrically connecting the electrical contacts when the mercury is in the first end of the container; and baffles between the first end and the second end of the container for baffling the flow of mercury from the first end to the second end of the container.
Claim 14
Dependent Claim
13 words
The ambulation aid of claim 9 wherein the warning indicator comprises a buzzer.
Claim 15
Dependent Claim
13 words
The ambulation aid of claim 9 wherein the warning indicator comprises a light.
Claim 16
Dependent Claim
13 words
The ambulation aid of claim 9 wherein the warning indicator comprises a vibrator.
Claim 17
Dependent Claim
20 words
The ambulation aid of claim 9 further comprising an on/off switch connected to the electrical circuit for breaking the circuit.
Claim 18
Independent Claim
122 words
A method for warning the user of an ambulation aid about improper use of the aid comprising: installing an warning device on the ambulation aid wherein the warning device has a power source attached to the ambulation aid; one or more gravity sensitive switches attached to the ambulation aid whereby gravity causes at least one switch to close when the ambulation aid is tilted beyond a specified angle for proper use; a warning indicator attached to the ambulation aid; and an electrical circuit connecting the power source, the gravity switch(es) and the warning indicator for activating the warning indicator when one or more of the gravity switches are in a closed position thereby alerting the user so improper use will not occur.
Claim 19
Independent Claim
122 words
A method for warning the user of an ambulation aid about improper use of the aid comprising: installing an warning device on the ambulation aid wherein the warning device has a power source attached to the ambulation aid; one or more gravity sensitive switches attached to the ambulation aid whereby gravity causes at least one switch to close when the ambulation aid is tilted beyond a specified angle for proper use; a warning indicator attached to the ambulation aid; and an electrical circuit connecting the power source, the gravity switch(es) and the warning indicator for activating the warning indicator when one or more of the gravity switches are in a closed position thereby alerting the user so improper use will not occur.
Claim 20
Dependent Claim
136 words
An ambulation aid having a warning device for alerting a user when the ambulation aid is not properly positioned for use, comprising: a case for attaching to the ambulation aid; power source attached to case; a plurality of mercury switches held at an angle by one or more adjustable switch mounts, said switch mount(s) being attached to the case and being adjustable so the angle of each mercury switch may be adjusted to close said switch when the ambulation aid is tilted beyond a specified angle; a warning indicator attached to the case; and an electrical circuit connecting to the power source, the mercury switch(es) and the warning indicator, said warning indicator activating when a mercury switch is in a closed position to alert the user when the ambulation aid is not properly positioned for use.
Claim 21
Dependent Claim
136 words
An ambulation aid having a warning device for alerting a user when the ambulation aid is not properly positioned for use, comprising: a case for attaching to the ambulation aid; power source attached to case; a plurality of mercury switches held at an angle by one or more adjustable switch mounts, said switch mount(s) being attached to the case and being adjustable so the angle of each mercury switch may be adjusted to close said switch when the ambulation aid is tilted beyond a specified angle; a warning indicator attached to the case; and an electrical circuit connecting to the power source, the mercury switch(es) and the warning indicator, said warning indicator activating when a mercury switch is in a closed position to alert the user when the ambulation aid is not properly positioned for use.
Claim 22
Dependent Claim
20 words
The warning device of claim 17 further comprising an on/off switch connected to the electrical circuit for breaking the circuit.
Claim 23
Dependent Claim
13 words
The warning device of claim 17 wherein the warning indicator comprises a buzzer.
Claim 24
Dependent Claim
14 words
The warning device of claim 17 wherein the mercury switches are baffled mercury switches.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-18 | 1999-06-19 | 1999-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-18 | 2003-06-19 | 2003-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-18 | 2007-06-19 | 2007-12-19 | $7700.00 | Window Closed / Lapsed |