US3712328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tire valve core
Assignee: Schrader Automotive Inc
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Filing: 1971-08-05
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Granted: 1973-01-23
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Expires: 1991-08-05
Abstract
Abstract Tire valve core has drawn metal shell with ridges on either side of plastic shell gasket and grooves aligned with edges of gasket to receive plastic flow and anchor gasket securely.
Inventors
- 👤 M Mcanally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:33
CPC Classifications
B; B63; B63C; B63C9/00; B63C9/24; F; F16; F16K; F16K15/00; F16K15/20; Y; Y10; Y10T; Y10T137/00; Y10T137/3584; Y10T137/3786; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7937
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
151 words
In a tire valve core comprising a two-piece core body including a machined head and a shell, the machined head being exteriorly threaded and having a bottom opening with an inward lip thereabout, the upper end of the shell having an outward flare, the lip at the lower end of the head being crimped inward to enclose the flare and hold the shell, a gasket of selflubricating plastic snugly surrounding the shell, and valve means disposed in the body; the improvement wherein the shell is of drawn sheet metal and is formed with a pair of spaced peripheral beads and a pair of spaced peripheral inward grooves disposed respectively adjacent the beads on the side of the respective bead which is more proximate the other bead and wherein the plastic gasket is a continuous band with the margins of the band flowing into and closely hugging into the inward grooves respectively.
Claim 2
Dependent Claim
151 words
In a tire valve core comprising a two-piece core body including a machined head and a shell, the machined head being exteriorly threaded and having a bottom opening with an inward lip thereabout, the upper end of the shell having an outward flare, the lip at the lower end of the head being crimped inward to enclose the flare and hold the shell, a gasket of selflubricating plastic snugly surrounding the shell, and valve means disposed in the body; the improvement wherein the shell is of drawn sheet metal and is formed with a pair of spaced peripheral beads and a pair of spaced peripheral inward grooves disposed respectively adjacent the beads on the side of the respective bead which is more proximate the other bead and wherein the plastic gasket is a continuous band with the margins of the band flowing into and closely hugging into the inward grooves respectively.
Claim 3
Dependent Claim
19 words
A tire valve core as described in claim 1 wherein the plastic of the gasket is a fluoride-containing polymer.
Claim 4
Dependent Claim
17 words
A tire valve core as dEscribed in claim 2 wherein the plastic of the gasket is polytetrafluoroethylene.
Claim 5
Dependent Claim
20 words
A tire valve core as described in claim 1 wherein the exterior surface of the gasket is of saw-toothed profile.
Claim 6
Dependent Claim
25 words
A tire valve core as described in claim 1 wherein the shell, between the lowermost depths of the two grooves presents a smooth frusto-conical shape.
Claim 7
Dependent Claim
135 words
In a valve core comprising a two-piece core body including a machined head and a shell, the machined head being exteriorly threaded and having a bottom opening with an inward lip thereabout, the upper end of the shell having an outward flare, the lip at the lower end of the head being crimped inward to enclose the flare and hold the shell, a gasket of self-lubricating plastic snugly surrounding the shell, and valve means disposed in the body; the improvement wherein the shell is of drawn sheet metal and is formed with at least one peripheral bead and a peripheral inward groove disposed adjacent the bead and wherein the plastic gasket is a continuous band with a margin of the band butting against the bead and flowing into and closely hugging into the inward groove.
Claim 8
Dependent Claim
135 words
In a valve core comprising a two-piece core body including a machined head and a shell, the machined head being exteriorly threaded and having a bottom opening with an inward lip thereabout, the upper end of the shell having an outward flare, the lip at the lower end of the head being crimped inward to enclose the flare and hold the shell, a gasket of self-lubricating plastic snugly surrounding the shell, and valve means disposed in the body; the improvement wherein the shell is of drawn sheet metal and is formed with at least one peripheral bead and a peripheral inward groove disposed adjacent the bead and wherein the plastic gasket is a continuous band with a margin of the band butting against the bead and flowing into and closely hugging into the inward groove.
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |