Patent US4479109A successfully refreshed from Google Patents.
US4479109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire deflation warning device
Assignee: Individual
•
Filing: 1982-06-07
•
Granted: 1984-10-23
•
Expires: 2002-06-07
Abstract
Abstract A tire deflation warning device having an arm carried by the rotating wheel and normally held retracted by a plunger activated by tire air pressure. Upon deflation the plunger releases the arm to be moved radially outwardly by centrifugal force so as to contact an element on the vehicle body and sound an alarm.
Inventors
- 👤 Ernest French
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:57
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/02; B60C23/04; B60C23/0401; B60C23/0403
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
226 words
A tire deflation warning device comprising, in combination, a spring-loaded plunger arrangement and a co-operating trip arm; said spring-loaded plunger arrangement being attachable to the underside of the periphery of a spacer ring of a dual wheel assembly and said co-operating trip arm being pivotally attachable to the outer side of the periphery of the said spacer ring; said spring-loaded plunger arrangement including a flexible conduit for communication with the valve of a tire of said dual wheel assembly or of an inner tube thereof; the plunger of said arrangement, when in its extended position due to said tire or tube being inflated to optimum pressure, being adapted to engage, through a slot in said spacer ring's periphery, a co-acting element of said trip arm to maintain it substantially parallel to the spacer ring's periphery but, when in its retracted position due to deflation of said tire or tube, disengages from said element to thereby permit said trip arm to swing through substantially a right angle, in response to centrifugal force, to assume a radial position in which its outer end is able to contact a contact element to thereby actuate a visible and/or audible signal in a cab of a vehicle to which the device is fitted, stop means being provided to prevent swinging movement of said trip arm beyond the said radial position thereof.
Claim 2
Dependent Claim
226 words
A tire deflation warning device comprising, in combination, a spring-loaded plunger arrangement and a co-operating trip arm; said spring-loaded plunger arrangement being attachable to the underside of the periphery of a spacer ring of a dual wheel assembly and said co-operating trip arm being pivotally attachable to the outer side of the periphery of the said spacer ring; said spring-loaded plunger arrangement including a flexible conduit for communication with the valve of a tire of said dual wheel assembly or of an inner tube thereof; the plunger of said arrangement, when in its extended position due to said tire or tube being inflated to optimum pressure, being adapted to engage, through a slot in said spacer ring's periphery, a co-acting element of said trip arm to maintain it substantially parallel to the spacer ring's periphery but, when in its retracted position due to deflation of said tire or tube, disengages from said element to thereby permit said trip arm to swing through substantially a right angle, in response to centrifugal force, to assume a radial position in which its outer end is able to contact a contact element to thereby actuate a visible and/or audible signal in a cab of a vehicle to which the device is fitted, stop means being provided to prevent swinging movement of said trip arm beyond the said radial position thereof.
Claim 3
Dependent Claim
188 words
A tire deflation warning device comprising, in combination, a spring-loaded plunger arrangement and a co-operating trip arm; both being attachable to the periphery of a spacer ring of a dual wheel assembly, said trip arm being pivotally attached thereto; said spring-loaded plunger arrangement including a flexible conduit for communication with the valve of a tire of said dual wheel assembly or of an inner tube thereof; the plunger of said arrangement, when in its extended position due to said tire or tube being inflated to optimum pressure, being adapted to engage a co-acting element of said trip arm to maintain it substantially parallel to the spacer ring's periphery but, when in its retracted position, due to deflation of said tire or tube, disengages from said element to thereby permit said trip arm to swing through substantially a right angle, in response to centrifugal force, to assume a radial position in which its outer end is able to contact a contact element to thereby cause a warning signal to be actuated; stop means being provided to prevent swinging movement of said trip arm beyond the said radial position thereof.
Claim 4
Dependent Claim
188 words
A tire deflation warning device comprising, in combination, a spring-loaded plunger arrangement and a co-operating trip arm; both being attachable to the periphery of a spacer ring of a dual wheel assembly, said trip arm being pivotally attached thereto; said spring-loaded plunger arrangement including a flexible conduit for communication with the valve of a tire of said dual wheel assembly or of an inner tube thereof; the plunger of said arrangement, when in its extended position due to said tire or tube being inflated to optimum pressure, being adapted to engage a co-acting element of said trip arm to maintain it substantially parallel to the spacer ring's periphery but, when in its retracted position, due to deflation of said tire or tube, disengages from said element to thereby permit said trip arm to swing through substantially a right angle, in response to centrifugal force, to assume a radial position in which its outer end is able to contact a contact element to thereby cause a warning signal to be actuated; stop means being provided to prevent swinging movement of said trip arm beyond the said radial position thereof.
References Cited (Backward Citations)
US3181118A
Cited
US3646514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-23 | 1988-04-23 | 1988-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-23 | 1992-04-23 | 1992-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-23 | 1996-04-23 | 1996-10-23 | $7700.00 | Window Closed / Lapsed |