Fluid handling – Inflatable article – With gauge or indicator
Reexamination Certificate
2001-10-29
2003-05-13
Noori, Max (Department: 2855)
Fluid handling
Inflatable article
With gauge or indicator
C137S224000, C073S146000, C073S146800
Reexamination Certificate
active
06561212
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to tires of motor vehicle and more particularly to a pressure indicating device for tire of motor vehicle with improved characteristics.
BACKGROUND OF THE INVENTION
A conventional valve
20
of a tube-less tire is projected from rim
10
as illustrated in
FIGS. 1 and 2
. Valve
20
comprises a hollow cylindrical member
30
through rim
10
; a tube member
40
having a lower portion secured within bore of hollow cylindrical member
30
and an upper portion with outer threaded section
402
and an inner threaded section
401
; a channel member
50
having a narrow inner hole; a spring
80
; a cap
60
having an outer threaded section
601
; and an elongate slender bar
70
having a thin disk
701
on lower part with spring
80
anchored between the narrow inner hole of channel member
50
and a top of the elongate slender bar
70
. The elongate slender bar
70
is inserted through the channel member
50
and cap
60
until disk
701
is stopped by bottom end of the channel member
50
which is in turn secured in tube member
40
. Also, threaded section
601
of cap
60
is secured to the inner threaded section
401
of tube member
40
. In inflating tire, air is pumped into tire through bores of cap
60
and channel member
50
by pushing down the elongate slender bar
70
by needle (not shown) for disengaging disk
701
from bottom end of the channel member
50
. In the mean time, a person can know the fullness of the tire by observing the pivoting of pointer of a pressure gauge coupled to an air pump. But in a use state of tire, above air passage is closed. Further, person can only knock on the tire by hand or foot for generally determining a fullness thereof by feeling its hardness or hearing its sound prior to driving. However, such technique is not reliable. Thus improvement exists.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide an apparatus mounted on a valve on a tire for indicating a pressure thereof. The apparatus comprises a pressure indicator formed of transparent plastic and including a base having a scale, the base consisting of an inner hollow cylinder sleeved on the valve and an outer hollow cylinder with tops of the cylinders open, a spring put on the inner hollow cylinder having a lower end rested on a bottom of the base, a hollow disk-shaped seal put on the inner hollow cylinder being urged by a top of the biased spring, an outer ring sleeved between the seal and an inner wall of the outer hollow cylinder, an inner ring sleeved between the seal and an outer wall of the inner hollow cylinder so as to eliminate a potential air flow through an inner or outer periphery of the seal, and a cap having a downward peg engaged with the valve, the cap being releasably secured to a top of the base wherein in indicating the pressure of the tire, air is flowed from within the tire to push down the seal through the valve and the pressure indicator so that a top of the seal is aligned with one of marks of the scale, and the pressure indicator is disengaged from the valve prior to inflating the tire.
It is another object of the present invention to provide an apparatus mounted on a first valve on a tire for indicating a pressure thereof. The apparatus comprises a pressure indicator formed of transparent plastic and including a base having a scale, the base consisting of an inner hollow cylinder sleeved on the first valve and an outer hollow cylinder with tops of the cylinders open, a spring put on the inner hollow cylinder having a lower end rested on a bottom of the base, a hollow disk-shaped seal put on the inner hollow cylinder being urged by a top of the biased spring, an outer ring sleeved between the seal and an inner wall of the outer hollow cylinder, an inner ring sleeved between the seal and an outer wall of the inner hollow cylinder so as to eliminate a potential air flow through an inner or outer periphery of the seal, and a cap releasably secured to a top of the base; and a second valve formed on a top of the cap and in communication with the cap, the second valve having an elongate slender bar engaged with the first valve; wherein in indicating the pressure of the tire, air is flowed from within the tire to push down the seal through the first valve and the pressure indicator so that a top of the seal is aligned with one of marks of the scale, and in inflating the tire, air is flowed to the tire through the second valve, the pressure indicator, and the first valve.
It is a further object of the present invention to provide an apparatus mounted on a first valve on a tire for indicating a pressure thereof. The apparatus comprises a pressure indicator formed of transparent plastic and including a base having a scale, the base consisting of an inner hollow cylinder sleeved on the first valve and an outer hollow cylinder with tops of the cylinders open, a spring put on the inner hollow cylinder having a lower end rested on a bottom of the base, a hollow disk-shaped seal put on the inner hollow cylinder being urged by a top of the biased spring, an outer ring sleeved between the seal and an inner wall of the outer hollow cylinder, an inner ring sleeved between the seal and an outer wall of the inner hollow cylinder so as to eliminate a potential air flow through an inner or outer periphery of the seal, and a cap integrally formed on a top of the base; and a second valve formed on a top of the cap and in communication with the cap, the second valve having an elongate slender bar engaged with the first valve; wherein in indicating the pressure of the tire, air is flowed from within the tire to push down the seal through the first valve and the pressure indicator so that a top of the seal is aligned with one of marks of the scale, and in inflating the tire, air is flowed to the tire through the second valve, the pressure indicator, and the first valve.
The above and other objects, features and advantages of the present invention will become apparent from the following detailed description taken with the accompanying drawings.
REFERENCES:
patent: 3866563 (1975-02-01), Bluem
patent: 3889530 (1975-06-01), Bluem
patent: 4686855 (1987-08-01), Smith
patent: 4788525 (1988-11-01), Lichtenstein
patent: 4901747 (1990-02-01), Yabor
patent: 5365967 (1994-11-01), Moore
patent: 6293297 (2001-09-01), Maldonado et al.
patent: 6351990 (2002-03-01), McInnes
Ellington Alandra N.
Kamrath Alan
L&F Plastics Co. Ltd.
Noori Max
Rider Bennett Egan & Arundel LLP
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