US3756190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure responsive device for indicating the magnitude of pressure changes
Assignee: Individual
•
Filing: 1972-02-18
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Granted: 1973-09-04
•
Expires: 1992-02-18
Abstract
Abstract A pressure responsive device for indicating the magnitude of pressure changes as they occur in a confined body of fluid. The device is characterized by a flexible tubular member communicating with the body of fluid having a wall portion thereof supported against elongation whereby the tubular member is caused to assume an arcuate configuration as the magnitude of the pressure increases, and a substantially linear configuration as the magnitude of the pressure of the body of fluid decreases. The device has particular utility with truck tires and the like for alerting drivers of reduced tire pressures.
Inventors
- 👤 H Kendall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:19
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/02; B60C23/04; B60C23/0401; B60C23/0405; B60C23/005; B60C23/007
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
146 words
A device adapted to be mounted on a rotatable wheel having a hub and a concentrically related rim for indicating reduction in pressure for a body of fluid confined within a pneumatic tire mounted on said rim comprising: an hermetically sealed, tubular member formed of a flexible material adapted to be affixed to the rim of said wheel in communication with said body of fluid, means for causing said member to assume an arcuate configuration for positioning the distal end of the member in juxtaposition with the hub of said wheel when the body of fluid is maintained at a preselected pressure, and means including an enlarged mass affixed to the distal end of said member for deflecting said member to a substantially linear configuration in response to centrifugal forces imposed thereon as said wheel is rotated when said pressure is reduced below said preselected pressure.
Claim 2
Independent Claim
146 words
A device adapted to be mounted on a rotatable wheel having a hub and a concentrically related rim for indicating reduction in pressure for a body of fluid confined within a pneumatic tire mounted on said rim comprising: an hermetically sealed, tubular member formed of a flexible material adapted to be affixed to the rim of said wheel in communication with said body of fluid, means for causing said member to assume an arcuate configuration for positioning the distal end of the member in juxtaposition with the hub of said wheel when the body of fluid is maintained at a preselected pressure, and means including an enlarged mass affixed to the distal end of said member for deflecting said member to a substantially linear configuration in response to centrifugal forces imposed thereon as said wheel is rotated when said pressure is reduced below said preselected pressure.
Claim 3
Dependent Claim
38 words
The device of claim 1 wherein said means for causing said member to assume an arcuate configuration includes an elongated, thickened portion of the wall of the tubular member, eccentrically related to the longitudinal axis of symmetry thereof.
Claim 4
Dependent Claim
38 words
The device of claim 1 wherein said means for causing said member to assume an arcuate configuration includes an elongated, pleated portion of the wall of the tubular member, eccentrically related to the longitudinal axis of symmetry thereof.
Claim 5
Dependent Claim
34 words
The device of claim 1 wherein said means for causing said member to assume an arcuate configuration includes an elongated leaf spring affixed to an elongated portion of the wall of the tubular member.
Claim 6
Dependent Claim
19 words
The device of claim 4 wherein said spring is characterized by a linear configuration when in an unstressed condition.
Claim 7
Dependent Claim
22 words
The device of claim 1 wherein said mass comprises a visually detectable flag affixed to the distal end of the tubular member.
Claim 8
Dependent Claim
36 words
The device of claim 6 wherein said means for causing said tubular member to assume arcuate and linear configurations includes an elongated leaf spring affixed to an elongated portion of a wall of the tubular member.
References Cited (Backward Citations)
US3561330A
Cited
US3680523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |