US3715720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for deteamining an underinflated condition in pneumatic tires
Assignee: Individual
•
Filing: 1971-02-25
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Granted: 1973-02-06
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Expires: 1991-02-25
Abstract
Abstract A device for detecting a flat or underinflated condition in a pneumatic vehicle tire as the tire traverses the device. The rod end of a ram serves as a probe mounted in the path of the vehicle tire and is biased into engagement with the tire by a predetermined force maintained in the ram through a regulated pressure circuit. A tire having adequate air pressure will exert sufficient downward force to overcome the biasing force and cause the rod to depress. An associated signal circuit is controlled by limit switches actuated by rod movement. Depression of the rod permits the switched circuit to remain inactive. Failure of the rod to depress the tire as it passes across the rod causes the circuit to actuate an appropriate signal.
Inventors
- 👤 F Jehle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:46
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/06; B60C23/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
149 words
A device for determining an underinflated condition in a pneumatic tire as the vehicle mounted tire passes across the device, said device comprising: platform means defining a vehicle roadway; means located in the roadway having probe means associated therewith, said probe means adapted to engage a vehicle tire, said probe being biased to a first position by a force of predetermined magnitude related to the desired test pressure and being movable to a second position against said bias by the force exerted by a tire of predetermined inflation; circuit means responsive to and actuated by said probe means, said circuit means remaining unactuated in response to said probe means assuming said second position and being responsive to said first position of said probe to render a signal indicating an underinflated condition whereby the inflation of a vehicle tire can be checked as the vehicle tire passes across said probe.
Claim 2
Independent Claim
149 words
A device for determining an underinflated condition in a pneumatic tire as the vehicle mounted tire passes across the device, said device comprising: platform means defining a vehicle roadway; means located in the roadway having probe means associated therewith, said probe means adapted to engage a vehicle tire, said probe being biased to a first position by a force of predetermined magnitude related to the desired test pressure and being movable to a second position against said bias by the force exerted by a tire of predetermined inflation; circuit means responsive to and actuated by said probe means, said circuit means remaining unactuated in response to said probe means assuming said second position and being responsive to said first position of said probe to render a signal indicating an underinflated condition whereby the inflation of a vehicle tire can be checked as the vehicle tire passes across said probe.
Claim 3
Independent Claim
149 words
A device for determining an underinflated condition in a pneumatic tire as the vehicle mounted tire passes across the device, said device comprising: platform means defining a vehicle roadway; means located in the roadway having probe means associated therewith, said probe means adapted to engage a vehicle tire, said probe being biased to a first position by a force of predetermined magnitude related to the desired test pressure and being movable to a second position against said bias by the force exerted by a tire of predetermined inflation; circuit means responsive to and actuated by said probe means, said circuit means remaining unactuated in response to said probe means assuming said second position and being responsive to said first position of said probe to render a signal indicating an underinflated condition whereby the inflation of a vehicle tire can be checked as the vehicle tire passes across said probe.
Claim 4
Independent Claim
149 words
A device for determining an underinflated condition in a pneumatic tire as the vehicle mounted tire passes across the device, said device comprising: platform means defining a vehicle roadway; means located in the roadway having probe means associated therewith, said probe means adapted to engage a vehicle tire, said probe being biased to a first position by a force of predetermined magnitude related to the desired test pressure and being movable to a second position against said bias by the force exerted by a tire of predetermined inflation; circuit means responsive to and actuated by said probe means, said circuit means remaining unactuated in response to said probe means assuming said second position and being responsive to said first position of said probe to render a signal indicating an underinflated condition whereby the inflation of a vehicle tire can be checked as the vehicle tire passes across said probe.
Claim 5
Independent Claim
156 words
A device for determining an underinflated condition in a pneumatic tire as the vehicle mounted tire passes across the device, said device comprising: platform means defining a vehicle roadway; an actuator associated with said platform and having a movable piston therein defining opposite pressure chambers and a piston rod extending therefrom, said piston rod extending above said platform to engage the vehicle tire as it travels across the platform; said piston and rod being biased by a predetermined force exerted by working pressure in the actuator to a first position and being movable by a predetermined force exerted by said tire to a second position; and circuit means including and signal means responsive to the position of said piston whereby said signal remains unactuated when said piston and rod are in said first position and upon said piston and rod being moved to said second position is engaged to render a signal indicating an underinflated condition.
Claim 6
Independent Claim
156 words
A device for determining an underinflated condition in a pneumatic tire as the vehicle mounted tire passes across the device, said device comprising: platform means defining a vehicle roadway; an actuator associated with said platform and having a movable piston therein defining opposite pressure chambers and a piston rod extending therefrom, said piston rod extending above said platform to engage the vehicle tire as it travels across the platform; said piston and rod being biased by a predetermined force exerted by working pressure in the actuator to a first position and being movable by a predetermined force exerted by said tire to a second position; and circuit means including and signal means responsive to the position of said piston whereby said signal remains unactuated when said piston and rod are in said first position and upon said piston and rod being moved to said second position is engaged to render a signal indicating an underinflated condition.
Claim 7
Independent Claim
197 words
A device for determining an underinflated condition in a pneumatic tire as the vehicle mounted tire is driven across the device, said device comprising: platform means defining a vehicle roadway; an actuator associated with said platform having a movable piston therein with an extending piston rod, said rod having a first position extending above said platform; a regulated supply of pressure connected to said actuator urging said rod to said first position and said rod being movable by a predetermined force exerted by said tire having an adequate inflation condition to a second position; circuit means associated with said actuator, said circuit means including a signal means and first switch means having a first closed and second open position, said switch movable to said first position when said actuator rod is moved to a second position in response to inadequately inflated tire; second switch means having a first closed and second open position and mounted to be actuated to said second closed position as a tire engages said rod, said signal means being actuated only when said first and second switch means assume their first positions causing said signal to be activated thereby indicating an underinflated condition.
Claim 8
Independent Claim
197 words
A device for determining an underinflated condition in a pneumatic tire as the vehicle mounted tire is driven across the device, said device comprising: platform means defining a vehicle roadway; an actuator associated with said platform having a movable piston therein with an extending piston rod, said rod having a first position extending above said platform; a regulated supply of pressure connected to said actuator urging said rod to said first position and said rod being movable by a predetermined force exerted by said tire having an adequate inflation condition to a second position; circuit means associated with said actuator, said circuit means including a signal means and first switch means having a first closed and second open position, said switch movable to said first position when said actuator rod is moved to a second position in response to inadequately inflated tire; second switch means having a first closed and second open position and mounted to be actuated to said second closed position as a tire engages said rod, said signal means being actuated only when said first and second switch means assume their first positions causing said signal to be activated thereby indicating an underinflated condition.
Claim 9
Dependent Claim
66 words
The device of claim 3 wherein said actuator is a pneumatic ram and said first switch is a limit switch positionable by movement of said rod and having a normally closed first position and an open second position and said second switch is a limit switch having actuating means located in said tire path and having a normally open first position and a closed second position.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |