Patent US3797181A successfully refreshed from Google Patents.
US3797181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof vent pipe shield
Assignee: Individual
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Filing: 1966-10-10
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Granted: 1974-03-19
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Expires: 1986-10-10
Abstract
Abstract A shield for protecting a roof vent pipe has an outer cylindrical sheath extending downwardly for a substantial distance with a substantially uniform outer diameter and terminating at the bottom in a flaring portion adapted to contact with the sealing base of the vent pipe. The upper end is inturned to form an inner cylinder extending downwardly for a distance substantially greater than the outer diameter of the outer cylinder. The vent pipe is thereby enclosed between the outer and inner portions of the shield. The shield is preferably molded from a non-metallic material such as polypropylene plastic.
Inventors
- 👤 F Nievelt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:36
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/14; E04D13/147; E04D13/1473; E04D13/1476; E04F; E04F17/00; E04F17/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
180 words
A shield for protecting a roof vent pipe comprising an outer cylindrical sheath having its upper end inturned to form an integral inner cylinder, said inner cylinder extending lengthwise of said outer sheath and spaced therefrom to provide an annular space for receiving a roof vent pipe, said outer sheath extending for a substantial lengthwise distance downwardly from said upper end with substantially uniform outer diameter and substantially uniform thin wall thickness, said inner cylinder extending downwardly from said upper end for a distance substantially greater than said outer diameter of said outer cylinder, said inner cylindrical sheath also having substantially uniform thin wall thickness and substantially uniform inner diameter, a flaring portion extending downwardly from and integral with said sheath, said flaring portion being annular in cross section with sides which are straight in longitudinal section extending at a constant angle for the entire flaring length, said flaring portion terminating in a lower edge lying in a plane extending at an angle with the longitudinal axis corresponding to the angle of roof with which said vent pipe is associated.
Claim 2
Dependent Claim
180 words
A shield for protecting a roof vent pipe comprising an outer cylindrical sheath having its upper end inturned to form an integral inner cylinder, said inner cylinder extending lengthwise of said outer sheath and spaced therefrom to provide an annular space for receiving a roof vent pipe, said outer sheath extending for a substantial lengthwise distance downwardly from said upper end with substantially uniform outer diameter and substantially uniform thin wall thickness, said inner cylinder extending downwardly from said upper end for a distance substantially greater than said outer diameter of said outer cylinder, said inner cylindrical sheath also having substantially uniform thin wall thickness and substantially uniform inner diameter, a flaring portion extending downwardly from and integral with said sheath, said flaring portion being annular in cross section with sides which are straight in longitudinal section extending at a constant angle for the entire flaring length, said flaring portion terminating in a lower edge lying in a plane extending at an angle with the longitudinal axis corresponding to the angle of roof with which said vent pipe is associated.
Claim 3
Dependent Claim
74 words
A shield for protecting a roof vent pipe according to claim 1 in which said roof vent pipe projects through a metal base having a flat portion engaging a roof, a collar surrounding said pipe, and a dome-shaped connection between said flat portion and said collar, said lower edge of the flaring portion of said shield being flexible and snugly engaging said dome in a line contact above the flat portion of said base.
Claim 4
Dependent Claim
60 words
A shield according to claim 2 in which said flaring portion is provided with a series of circumferential lines respectively lying in a series of different planes at different angles with respect to the longitudinal axis of said shield thereby providing indicia for trimming said flaring portion to obtain a lower edge of desired angularity to fit a predetermined roof.
Claim 5
Dependent Claim
91 words
A shield for protecting a roof vent pipe according to claim 2 in which the entire structure is composed of a molded polypropylene plastic thereby providing a rust-free lightning insulator, said plastic having incorporated therein gold flakes, in which said flaring portion is provided with a series of circumferential lines respectively lying in a series of different planes at different angles with respect to the longitudinal axis of said shield thereby providing indicia for trimming said flaring portion to obtain a lower edge of desired angularity to fit a predetermined roof.
Claim 6
Dependent Claim
24 words
A shield according to claim 1 in which the entire structure is composed of a molded polypropylene plastic thereby providing a rust-free lightning insulator.
Claim 7
Dependent Claim
18 words
A shield according to claim 1 in which said entire structure is composed of a molded polypropylene plastic.
Claim 8
Dependent Claim
133 words
A shield for protecting a roof vent pipe according to claim 6 in which said roof vent pipe projects through a metal base having a flat portion engaging a roof, a collar surrounding said pipe, and a dome-shaped connection between said flat portion and said collar, said lower edge of the flaring portion and said shield being flexible and snugly engaging said dome in a line contact above the flat portion of said base and in which said flaring portion is provided with a series of circumferential lines respectively lying in a series of different planes at different angles with respect to the longitudinal axis of said shield thereby providing indicia for trimming said flaring portion to obtain a lower edge of desired angularity to correspond with the pitch of a predetermined roof.
Claim 9
Dependent Claim
60 words
A shield according to claim 1 in which said flaring portion is provided with a series of circumferential lines respectively lying in a series of different planes at different angles witH respect to the longitudinal axis of said shield thereby providing indicia for trimming said flaring portion to obtain a lower edge of desired angularity to fit a predetermined roof.
Claim 10
Dependent Claim
39 words
A shield according to claim 1 in which the intersection of said sheath with the depending flaring portion is provided on the interior surface thereof with a series of protuberances forming abutments to facilitate ejection from a molding machine.
Claim 11
Dependent Claim
75 words
A shield for protecting a roof vent pipe according to claim 1 in which said outer sheath is constructed of two separate parts telescopically engaging each other, the lower part with said flaring portion having its outer cylindrical sheath terminating a short distance above said flaring portion, and the upper part having its outer cylindrical sheath of slightly larger diameter to telescopically engage said lower part, said upper part being integral with said inner cylinder.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |