US3622033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil filler plug with vent passage
Assignee: JH Fenner and Co Ltd
•
Filing: 1969-08-27
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Granted: 1971-11-23
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Expires: 1989-08-27
Abstract
Abstract A combined oil filler and breather plug comprising a body adapted for removable attachment to an oil exit port on a machine casing, and ventilating passage means within the body which, when the body is attached to said oil input port, connect the inside of said machine casing to an exit port or ports at the exterior of said body a filter element formed from an interstitial plastics material being located externally of the plug body so as to completely enclose said exit port or ports of the ventilating passage means whereby air passing through the plug to the machine casing must pass through the filter.
Inventors
- 👤 William W Butler
- 👤 Harvey Holtby
- 👤 Graham J T Pinder
- 👤 Sidney J Moore
- 👤 Bernard Faulkner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:05
CPC Classifications
F; F16; F16N; F16N21/00; F16N21/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
A combined oil filler and breather plug comprising a plug body, screwthread means on the plug for attaching the plug body to an oil input port on a machine casing, ventilation passage means within the plug body, exit port means for the ventilating passage means which are located at the exterior of said plug body and which, when the plug body is attached to said oil input port, are connected to the inside of the machine casing by said ventilating passage means, a shoulder formed on the plug body, a cap releasably attached to the plug body, and a cylindrical filter element formed from an interstitial plastics material being rigidly located between said shoulder on the plug body and the cap so as to completely enclose exit port means.
Claim 2
Dependent Claim
129 words
A combined oil filler and breather plug comprising a plug body, screwthread means on the plug for attaching the plug body to an oil input port on a machine casing, ventilation passage means within the plug body, exit port means for the ventilating passage means which are located at the exterior of said plug body and which, when the plug body is attached to said oil input port, are connected to the inside of the machine casing by said ventilating passage means, a shoulder formed on the plug body, a cap releasably attached to the plug body, and a cylindrical filter element formed from an interstitial plastics material being rigidly located between said shoulder on the plug body and the cap so as to completely enclose exit port means.
Claim 3
Dependent Claim
39 words
A plug according to claim 1 in which at least one radially directed passage connects the exit port means to said ventilating passage means, and in which the ventilating passage means comprises an axial bore in said plug body.
Claim 4
Dependent Claim
54 words
A plug according to claim 2 in which said plug body comprises a generally cylindrical center portion, an externally screw-threaded projection on said center portion serving for connecting the plug body to said machine casing, and a generally cylindrical neck portion extending from said center portion in which said exit port means are located.
Claim 5
Dependent Claim
73 words
A plug according to claim 2 in which said plug body comprises a center portion of generally hexagonal configuration to facilitate tightening of the plug onto said machine casing by means of a suitable hand tool, an externally screw-threaded projection on said center portion serving for connecting the plug body to said machine casing, and a generally cylindrical neck portion extending from said center portion in which said exit port means are located.
Claim 6
Dependent Claim
23 words
A plug according to claim 3 wherein an annular space is formed between said filter and said neck portion of the plug body.
Claim 7
Dependent Claim
33 words
A plug according to claim 5 in which a cylindrical cover portion is provided on the cap which is coaxial with the plug body and which embraces the filter to provide protection therefor.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |