US4574629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire pressure gauge having on-off means and being assembled from the tail end thereof
Assignee: Individual
•
Filing: 1984-05-24
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Granted: 1986-03-11
•
Expires: 2004-05-24
Abstract
Abstract It is a new tire pressure gauge, which comprises a ventilation pin, a compressed spring to control the air flowing in or out of the gauge; the air entered the gauge will push a pressure piston moving along a scale housing, and the point where the pressure piston stops will indicate the tire pressure.
Inventors
- 👤 Hsi-Kuang Weng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:22
CPC Classifications
G; G01; G01L; G01L17/00; G01L7/00; G01L7/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
104 words
A tire pressure gauge adapted to be assembled from its tail end, comprising a housing head to be pressed against a tire valve, air valve means slidably positioned within said housing head, pressure measuring means secured to said housing head, said pressure measuring means including a housing terminating in an inner cylinder, a coupling housing intimately engaging said inner cylinder and completing a pressure chamber with said housing, a scale associated with said housing, and a pressure member cooperatively engaged with said scale to provide an air pressure reading, and an on-off means for controlling air movement into and out of said pressure chamber.
Claim 2
Dependent Claim
104 words
A tire pressure gauge adapted to be assembled from its tail end, comprising a housing head to be pressed against a tire valve, air valve means slidably positioned within said housing head, pressure measuring means secured to said housing head, said pressure measuring means including a housing terminating in an inner cylinder, a coupling housing intimately engaging said inner cylinder and completing a pressure chamber with said housing, a scale associated with said housing, and a pressure member cooperatively engaged with said scale to provide an air pressure reading, and an on-off means for controlling air movement into and out of said pressure chamber.
Claim 3
Dependent Claim
32 words
A tire pressure gauge as claimed in claim 1, wherein said air valve means includes a ventilation pin, and said on-off means include an on-off piston, a compressed spring and a shim.
Claim 4
Dependent Claim
28 words
A tire pressure gauge as claimed in claim 2, wherein said on-off means further include an air passage, a piston chamber, a spring chamber, and a shim chamber.
Claim 5
Dependent Claim
58 words
A tire pressure gauge as claimed in claim 2, wherein said ventilation pin includes a stem provided with a longitudinally extending pin hole passage, and spaced pin holes at the inner end of said stem, said pin holes being adapted to align with a corresponding number of pin holes in an on-off piston attached to said ventilation pin.
Claim 6
Dependent Claim
61 words
A tire pressure gauge as claimed in claim 1, wherein said housing is made from a transparent material and said scale is supported on said transparent housing, whereby upon pressure being applied to the gauge, the pressure member will depress a compressed spring and stop at the balanced pressure point to indicate on the scale a reading of the tire pressure.
Claim 7
Dependent Claim
39 words
A tire pressure gauge as claimed in claim 1, wherein said scale is in the form of a stick adapted to extend out of said coupling head to provide a pressure reading against the edge of said coupling housing.
Claim 8
Dependent Claim
40 words
A tire pressure gauge as claimed in claim 1, wherein said inner cylinder possesses a tapered configuration and said coupling housing contains a tapered chamber adapted to be tightly sleeved over the inner cylinder to provide said air-tight pressure chamber.
References Cited (Backward Citations)
US2903888A
Cited
US4193295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |