Patent US3720224A successfully refreshed from Google Patents.
US3720224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire pressure indicator and inflation device
Assignee: JOCO Inc
•
Filing: 1970-12-18
•
Granted: 1973-03-13
•
Expires: 1990-12-18
Abstract
Abstract A tire pressure indicator and inflation device which includes an outer housing having a bore and counterbore formed therein, and an internal housing positioned in the bore of the outer housing. The internal housing is constructed of resilient material, and has an internally threaded hollow interior for connecting the internal housing to the stem of the valve of a pneumatic tire. The internal housing is generally cylindrical in shape and is resiliently collapsible in an axial direction. The internal housing has an end plate which extends across and closes one end thereof and which carries a valve core depressor element. An elongated pressure indicator element carrying a piston at one end thereof is slidably mounted within the bore of the outer housing so that the piston seals against the internal wall of the outer housing in the bore. The piston and associated pressure indicator element are biased by a spring positioned between the piston and an internal shoulder on the outer housing to a position adjacent the internal housing.
Inventors
- 👤 O Foxhall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:50
CPC Classifications
B; B60; B60C; B60C23/00; B60C23/02; B60C23/04; B60C23/0491; B60C23/0496; Y; Y10; Y10T; Y10T137/00; Y10T137/3584; Y10T137/3662
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
487 words
A pressure indicator and inflation device comprising: a tubular outer housing having openings at opposite ends thereof, and having a bore extending thereinto from one of the open ends thereof, and further having a counterbore extending thereinto from the other open end thereof to said bore, said housing having an inner wall defining said bore and counterbore, and having air passageway means in said internal wall at the intersection of said bore and counterbore; a resilient inner housing positioned slidably within said outer housing adjacent said other open end thereof and in said bore, said inner housing including: a cylindrical side wall slidably contacting said outer housing and having threads thereon for securement of the inner housing to the threaded stem of a pneumatic tire; an end plate spaced from said cylindrical side wall, extending transversely in said bore and having ports therethrough; a first valve core depressor projection projecting from one side of said end plate axially in said bore; a second valve core depressor projection projecting from the opposite side of said endplate axially in said bore, said second valve core depressor projection being centrally positioned in said bore opposite the threads on said cylindrical side wall for contacting the valve core of a pneumatic tire when said cylindrical side wall is threaded on the core thereof, and said end plate and core depressor projections are biased toward said cylindrical side wall; and a resilient, annular deformable portion interconnecting said cylindrical side wall and said end plate and facilitating, through resilient deformation, movement of said end plate and the valve core depressor projections carried thereby toward and away from said cylindrical side wall; piston means slidably positioned within said outer housing and including: an elongated pressure indicator element positioned in, and extending axially in, said counterbore; and a piston secured to the end of said elongated pressure indicator element nearest said other open end of said tubular outer housing, and dimensioned to sealingly engage the inner wall of said outer housing defining said counterbore; and spring means positioned in said outer housing and having one end contacting said piston and the other end contacting a portion of said outer housing adjacent said one open end thereof and resiliently urging said piston away from said one open end of said outer housing and toward the end plate and first valve core depressor projection of said inner housing; said spring means being positioned to urge said piston into contact with said first valve core depressor projection when the air pressure is equalized on opposite sides of said piston; and said resilient deformable portion of said inner housing being positioned so as to cooperate with said spring means in urging said piston to an equilibrium position in said counterbore when the air pressure is equalized on opposite sides of said piston and said counterbore in said outer housing is spaced from said end plate of said inner housing.
Claim 2
Dependent Claim
487 words
A pressure indicator and inflation device comprising: a tubular outer housing having openings at opposite ends thereof, and having a bore extending thereinto from one of the open ends thereof, and further having a counterbore extending thereinto from the other open end thereof to said bore, said housing having an inner wall defining said bore and counterbore, and having air passageway means in said internal wall at the intersection of said bore and counterbore; a resilient inner housing positioned slidably within said outer housing adjacent said other open end thereof and in said bore, said inner housing including: a cylindrical side wall slidably contacting said outer housing and having threads thereon for securement of the inner housing to the threaded stem of a pneumatic tire; an end plate spaced from said cylindrical side wall, extending transversely in said bore and having ports therethrough; a first valve core depressor projection projecting from one side of said end plate axially in said bore; a second valve core depressor projection projecting from the opposite side of said endplate axially in said bore, said second valve core depressor projection being centrally positioned in said bore opposite the threads on said cylindrical side wall for contacting the valve core of a pneumatic tire when said cylindrical side wall is threaded on the core thereof, and said end plate and core depressor projections are biased toward said cylindrical side wall; and a resilient, annular deformable portion interconnecting said cylindrical side wall and said end plate and facilitating, through resilient deformation, movement of said end plate and the valve core depressor projections carried thereby toward and away from said cylindrical side wall; piston means slidably positioned within said outer housing and including: an elongated pressure indicator element positioned in, and extending axially in, said counterbore; and a piston secured to the end of said elongated pressure indicator element nearest said other open end of said tubular outer housing, and dimensioned to sealingly engage the inner wall of said outer housing defining said counterbore; and spring means positioned in said outer housing and having one end contacting said piston and the other end contacting a portion of said outer housing adjacent said one open end thereof and resiliently urging said piston away from said one open end of said outer housing and toward the end plate and first valve core depressor projection of said inner housing; said spring means being positioned to urge said piston into contact with said first valve core depressor projection when the air pressure is equalized on opposite sides of said piston; and said resilient deformable portion of said inner housing being positioned so as to cooperate with said spring means in urging said piston to an equilibrium position in said counterbore when the air pressure is equalized on opposite sides of said piston and said counterbore in said outer housing is spaced from said end plate of said inner housing.
Claim 3
Dependent Claim
487 words
A pressure indicator and inflation device comprising: a tubular outer housing having openings at opposite ends thereof, and having a bore extending thereinto from one of the open ends thereof, and further having a counterbore extending thereinto from the other open end thereof to said bore, said housing having an inner wall defining said bore and counterbore, and having air passageway means in said internal wall at the intersection of said bore and counterbore; a resilient inner housing positioned slidably within said outer housing adjacent said other open end thereof and in said bore, said inner housing including: a cylindrical side wall slidably contacting said outer housing and having threads thereon for securement of the inner housing to the threaded stem of a pneumatic tire; an end plate spaced from said cylindrical side wall, extending transversely in said bore and having ports therethrough; a first valve core depressor projection projecting from one side of said end plate axially in said bore; a second valve core depressor projection projecting from the opposite side of said endplate axially in said bore, said second valve core depressor projection being centrally positioned in said bore opposite the threads on said cylindrical side wall for contacting the valve core of a pneumatic tire when said cylindrical side wall is threaded on the core thereof, and said end plate and core depressor projections are biased toward said cylindrical side wall; and a resilient, annular deformable portion interconnecting said cylindrical side wall and said end plate and facilitating, through resilient deformation, movement of said end plate and the valve core depressor projections carried thereby toward and away from said cylindrical side wall; piston means slidably positioned within said outer housing and including: an elongated pressure indicator element positioned in, and extending axially in, said counterbore; and a piston secured to the end of said elongated pressure indicator element nearest said other open end of said tubular outer housing, and dimensioned to sealingly engage the inner wall of said outer housing defining said counterbore; and spring means positioned in said outer housing and having one end contacting said piston and the other end contacting a portion of said outer housing adjacent said one open end thereof and resiliently urging said piston away from said one open end of said outer housing and toward the end plate and first valve core depressor projection of said inner housing; said spring means being positioned to urge said piston into contact with said first valve core depressor projection when the air pressure is equalized on opposite sides of said piston; and said resilient deformable portion of said inner housing being positioned so as to cooperate with said spring means in urging said piston to an equilibrium position in said counterbore when the air pressure is equalized on opposite sides of said piston and said counterbore in said outer housing is spaced from said end plate of said inner housing.
Claim 4
Dependent Claim
487 words
A pressure indicator and inflation device comprising: a tubular outer housing having openings at opposite ends thereof, and having a bore extending thereinto from one of the open ends thereof, and further having a counterbore extending thereinto from the other open end thereof to said bore, said housing having an inner wall defining said bore and counterbore, and having air passageway means in said internal wall at the intersection of said bore and counterbore; a resilient inner housing positioned slidably within said outer housing adjacent said other open end thereof and in said bore, said inner housing including: a cylindrical side wall slidably contacting said outer housing and having threads thereon for securement of the inner housing to the threaded stem of a pneumatic tire; an end plate spaced from said cylindrical side wall, extending transversely in said bore and having ports therethrough; a first valve core depressor projection projecting from one side of said end plate axially in said bore; a second valve core depressor projection projecting from the opposite side of said endplate axially in said bore, said second valve core depressor projection being centrally positioned in said bore opposite the threads on said cylindrical side wall for contacting the valve core of a pneumatic tire when said cylindrical side wall is threaded on the core thereof, and said end plate and core depressor projections are biased toward said cylindrical side wall; and a resilient, annular deformable portion interconnecting said cylindrical side wall and said end plate and facilitating, through resilient deformation, movement of said end plate and the valve core depressor projections carried thereby toward and away from said cylindrical side wall; piston means slidably positioned within said outer housing and including: an elongated pressure indicator element positioned in, and extending axially in, said counterbore; and a piston secured to the end of said elongated pressure indicator element nearest said other open end of said tubular outer housing, and dimensioned to sealingly engage the inner wall of said outer housing defining said counterbore; and spring means positioned in said outer housing and having one end contacting said piston and the other end contacting a portion of said outer housing adjacent said one open end thereof and resiliently urging said piston away from said one open end of said outer housing and toward the end plate and first valve core depressor projection of said inner housing; said spring means being positioned to urge said piston into contact with said first valve core depressor projection when the air pressure is equalized on opposite sides of said piston; and said resilient deformable portion of said inner housing being positioned so as to cooperate with said spring means in urging said piston to an equilibrium position in said counterbore when the air pressure is equalized on opposite sides of said piston and said counterbore in said outer housing is spaced from said end plate of said inner housing.
Claim 5
Dependent Claim
47 words
A pressure indicator and inflation device as defined in claim 1 wherein said inner housing and outer housing are each generally cylindrical in configuration, and said inner housing is keyed to said outer housing to prevent relative rotational movement between said housings and about a common axis.
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |