Patent EP0256816A1 successfully refreshed from Google Patents.
US3717845A
Expired / Lapsed
US
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Vehicle tire deflation signalling system
Assignee: RENZ EUGENE E JR
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Filing: 1971-02-08
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Granted: 1973-02-20
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Expires: 1991-02-08
Abstract
Abstract A mechanism for actuating signalling means primarily at the operator''s station of an automotive vehicle to indicate deflation or under inflation of a pneumatic tire on any of the loadcarrying wheels of the vehicle, mechanical means carried by the wheels being provided for actuating an electrical switch positioned on a relatively fixed portion of the vehicle to activate the signalling means upon the pressure in the adjacent tire falling below a predetermined value.
Inventors
- 👤 H Winther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:57
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/02; B60C23/04; B60C23/0491; B60C23/0496; B60C23/005; B60C23/007; F; F16; F16K; F16K15/00; F16K15/20; F16K15/207; G; G01; G01L; G01L17/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
92 words
Apparatus of the character described comprising a pressuredifferential-responsive valve, a mechanical element carried by a moving structure movable relatively to said structure into a path abnormal with respect to said structure, a relatively stationary signal-activating element interposed in said path for actuation by said element when in said abnormal path, means defining a fluid conduit carried by said structure and pressure responsive means for projecting said mechanical element into said abnormal path in response to pressure-differential actuation of said valve and introduction thereby of fluid pressure into said conduit from said valve.
Claim 2
Dependent Claim
92 words
Apparatus of the character described comprising a pressuredifferential-responsive valve, a mechanical element carried by a moving structure movable relatively to said structure into a path abnormal with respect to said structure, a relatively stationary signal-activating element interposed in said path for actuation by said element when in said abnormal path, means defining a fluid conduit carried by said structure and pressure responsive means for projecting said mechanical element into said abnormal path in response to pressure-differential actuation of said valve and introduction thereby of fluid pressure into said conduit from said valve.
Claim 3
Dependent Claim
92 words
Apparatus of the character described comprising a pressure-differential-responsive valve, a mechanical element carried by a moving structure movable relatively to said structure into a path abnormal with respect to said structure, a relatively stationary signal-activating element interposed in said path for actuation by said element when in said abnormal path, means defining a fluid conduit carried by said structure and pressure responsive means for projecting said mechanical element into said abnormal path in response to pressure-differential actuation of said valve and introduction thereby of fluid pressure into said conduit from said valve.
Claim 4
Dependent Claim
92 words
Apparatus of the character described comprising a pressure-differential-responsive valve, a mechanical element carried by a moving structure movable relatively to said structure into a path abnormal with respect to said structure, a relatively stationary signal-activating element interposed in said path for actuation by said element when in said abnormal path, means defining a fluid conduit carried by said structure and pressure responsive means for projecting said mechanical element into said abnormal path in response to pressure-differential actuation of said valve and introduction thereby of fluid pressure into said conduit from said valve.
Claim 5
Dependent Claim
31 words
Apparatus as defined in claim 1 in which the moving structure is rotatable and the relatively stationary signal activating element comprises a lever engageable by said mechanical element during its rotation.
Claim 6
Dependent Claim
53 words
Apparatus as defined in claim 1 in which the moving Structure is a vehicle wheel, the relatively stationary signal activating element is carried by the vehicle body and said mechanical element is actuated by air-pressure derived from the wheel tire when air under pressure is released from the tire by the pressure-differential-responsive valve.
Claim 7
Dependent Claim
125 words
Apparatus of the character described comprising a pressure-differential-responsive valve, a mechanical element carried by a moving structure movable into a path abnormal with respect to said structure, a relatively stationary signal-activating element interposed in said path for actuation by said element when in said abnormal path and means carried by said structure for projecting said mechanical element into said abnormal path in response to pressure-differential actuation of said valve, said pressure-differential-responsive valve comprising a spring biased valve poppet, a substantially cylindrical housing for the poppet providing a valve seat for the poppet, the spring biasing the poppet away from said seat, and said movable mechanical element being adapted to be actuated by fluid under pressure after the spring has separated the poppet from its seat.
Claim 8
Dependent Claim
125 words
Apparatus of the character described comprising a pressure-differential-responsive valve, a mechanical element carried by a moving structure movable into a path abnormal with respect to said structure, a relatively stationary signal-activating element interposed in said path for actuation by said element when in said abnormal path and means carried by said structure for projecting said mechanical element into said abnormal path in response to pressure-differential actuation of said valve, said pressure-differential-responsive valve comprising a spring biased valve poppet, a substantially cylindrical housing for the poppet providing a valve seat for the poppet, the spring biasing the poppet away from said seat, and said movable mechanical element being adapted to be actuated by fluid under pressure after the spring has separated the poppet from its seat.
Claim 9
Dependent Claim
29 words
Apparatus as defined in claim 4 in which the poppet is normally held in sealing engagement with its seat against the spring bias by fluid pressure in said housing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |