US3596509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring tire pressures
Assignee: Individual
•
Filing: 1969-08-18
•
Granted: 1971-08-03
•
Expires: 1989-08-18
Abstract
Abstract A pressure gauge for communication with the air in a tire including a graduated circular scale rotatable with respect to a pointer in response to the pressure in the tire. The pointer is operatively connected to a galvanometer controlled by a circuit having two thermistors responsive to the temperatures of the air in the tire and the ambient air respectively.
Inventors
- 👤 Giulio Raffaelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:55
CPC Classifications
G; G01; G01L; G01L17/00; Y; Y10; Y10T; Y10T137/00; Y10T137/3584; Y10T137/3662; Y10T137/8158; Y10T137/8326
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
125 words
An apparatus for measuring the inflation pressure in tires corrected for temperature variations to ambient temperature comprising: support means; a graduated scale rotatably carried by said support means; driving means operatively connected to said scale and to said tire for rotating said scale in response to the actual inflation pressure in said tire; indicator means carried by said support means and overlying said scale to indicate the reading on said scale; and galvanometric means including means operatively connected to said indicator means and to said tire for shifting said indicator means with respect to said scale to cause said indicator means to indicate a reading on said scale corresponding to the inflation pressure the tire would have had if the tire were at ambient temperature.
Claim 2
Independent Claim
125 words
An apparatus for measuring the inflation pressure in tires corrected for temperature variations to ambient temperature comprising: support means; a graduated scale rotatably carried by said support means; driving means operatively connected to said scale and to said tire for rotating said scale in response to the actual inflation pressure in said tire; indicator means carried by said support means and overlying said scale to indicate the reading on said scale; and galvanometric means including means operatively connected to said indicator means and to said tire for shifting said indicator means with respect to said scale to cause said indicator means to indicate a reading on said scale corresponding to the inflation pressure the tire would have had if the tire were at ambient temperature.
Claim 3
Dependent Claim
33 words
Apparatus as set forth in claim 1 further including brake means for selectively locking the position of said indicator means a predetermined period of time after said driving means has rotated said scale.
Claim 4
Dependent Claim
30 words
Apparatus as set forth in claim 1 wherein said driving means includes mechanism for causing said scale to be rotated logarithmically in response to the inflation pressure in the tire.
Claim 5
Dependent Claim
63 words
Apparatus as set forth in claim 1 wherein said galvanometric means includes a pointer, a galvanometer, a first pickup responsive to the ambient air temperature operatively connected to said galvanometer, and a second pickup responsive to the air in the tire operatively connected to said galvanometer, said galvanometer constructed and arranged to combine the outputs differentially from said pickups and shift said pointer.
Claim 6
Dependent Claim
54 words
Apparatus as set forth in claim 2 wherein said brake means includes an electromagnetic brake, a timer, and a switch electrically connected in series, said switch activated by said driving means as said driving means shifts said scale and said timer actuating said brake a predetermined period of time after said switch is activated.
Claim 7
Dependent Claim
28 words
Apparatus as set forth in claim 4 wherein said galvanometer defines an air gap shaped so as to compensate for the deviations in the displacement of said pointer.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |