US3859849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve stem pressure indicator
Assignee: Individual
•
Filing: 1973-03-21
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Granted: 1975-01-14
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Expires: 1993-03-21
Abstract
Abstract A pneumatic tire pressure gauge or filler device having an adjustable biasing means for setting the air pressure which is contained in a tire. The device includes a whistle aperture whereby when the pressure contained in the tire is above the adjusted pressure, the excess pressure will escape through the aperture and emit a whistling sound.
Inventors
- 👤 Greg A Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:20
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/02; B60C23/04; B60C23/0401; B60C23/0403; G; G01; G01L; G01L17/00; Y; Y10; Y10T; Y10T137/00; Y10T137/3584; Y10T137/3662; Y10T137/3693
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
285 words
A pneumatic pressure indicator comprising a hollow valve stem having a passageway extending axially therethrough attached to a tire or the like, a hollow, threaded shaft threadably mounted in one end of the passageway of said valve stem and having an axial passageway generally coaxial to said valve stem passageway, said threaded shaft being provided with turning flats on opposite sides thereof and a calibrated series of pressure indicating numbers formed along said flats which are alignable with an indicating means according to the pressure desired, a valve seat formed in said passageway through said stem near the connection of said stem to said tire, a piston valve reciprocally positioned in said stem passageway and capable of seating against said valve seat, and an elongated hollow stem fixed to said piston valve to provide a passage therethrough and extending outwardly into said passageway formed in said threaded shaft whereby air can be passed into the tire through said piston valve, such as by placing a pressurized air hose over a spring biased air inlet valve mounted in the upper end of said shaft passageway, at least one spring mounted over said stem and held between the lower end of said threaded shaft and said valve portion, the compression of said spring being adjustable for biasing said piston valve against said valve seat by the rotation of said shaft within said passageway of said stem, and a whistle aperture formed in the side of said valve stem above said valve seat whereby air is released through said aperture producing an audible sound when said piston valve is moved upward against the biasing of said spring at a preselected pressure level in a tire or the like.
Claim 2
Dependent Claim
285 words
A pneumatic pressure indicator comprising a hollow valve stem having a passageway extending axially therethrough attached to a tire or the like, a hollow, threaded shaft threadably mounted in one end of the passageway of said valve stem and having an axial passageway generally coaxial to said valve stem passageway, said threaded shaft being provided with turning flats on opposite sides thereof and a calibrated series of pressure indicating numbers formed along said flats which are alignable with an indicating means according to the pressure desired, a valve seat formed in said passageway through said stem near the connection of said stem to said tire, a piston valve reciprocally positioned in said stem passageway and capable of seating against said valve seat, and an elongated hollow stem fixed to said piston valve to provide a passage therethrough and extending outwardly into said passageway formed in said threaded shaft whereby air can be passed into the tire through said piston valve, such as by placing a pressurized air hose over a spring biased air inlet valve mounted in the upper end of said shaft passageway, at least one spring mounted over said stem and held between the lower end of said threaded shaft and said valve portion, the compression of said spring being adjustable for biasing said piston valve against said valve seat by the rotation of said shaft within said passageway of said stem, and a whistle aperture formed in the side of said valve stem above said valve seat whereby air is released through said aperture producing an audible sound when said piston valve is moved upward against the biasing of said spring at a preselected pressure level in a tire or the like.
Claim 3
Dependent Claim
74 words
The pneumatic pressure indicator of claim 1 further comprising a locking member having an upper locking portion with a threaded bore formed therein for threadably engaging said threaded shaft and a skirt portion internally threaded for threadedly engaging said valve stem whereby, when said locking member is threaded into engagement with said stem and shaft, said stem and shaft are locked together such that they cannot change their relative position in an unintended manner.
Claim 4
Dependent Claim
45 words
The pneumatic pressure indicator of claim 2 wherein said indicating means is comprised of a view port formed in the upper portion of said locking means such that said threaded shaft is turned until the number indicating the desired pressure appears in said viewing port.
Claim 5
Dependent Claim
52 words
The pneumatic pressure indicator of claim 3 wherein said skirt of said locking member when in locking position extends down over said threaded shaft to cover said whistle aperture whereby dirt and other foreign matter are prevented from clogging said aperture and whereby air will not escape during a transient overpressure condition.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |