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US3823744A Expired / Lapsed US ⏱️ 0.0 years remaining

Pipe protector

Assignee: Individual
•
Filing: 1972-10-06
•
Granted: 1974-07-16
•
Expires: 1992-10-06
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Abstract

Abstract A pipe protector for use in protecting a pipe having an end as concrete is located adjacent to the pipe end and in providing a cavity within the concrete extending around the pipe adjacent to the pipe end preferably is constructed as a single unit out of a polyolefin polymer such as polyethylene which is substantially incapable of bonding to concrete as the concrete sets. Such a protector includes a top having a handle adapted to be used for removing the protector after concrete has been cast around it, a dependent skirt attached to the top which is capable of fitting around the pipe adjacent to the pipe end and at least three spacing fins attached to the skirt so as to extend radially inwardly from the skirt. The fins are capable of engaging the exterior of the pipe so as to stablize the protector and are sufficiently flexible so as to absorb at least some forces applied to the exterior of the skirt so as to tend to cushion the pipe against damage.

Inventors

  • 👤 D Logsdon

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 22:06
CPC Classifications
B; B65; B65D; B65D59/00; B65D59/06

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 344 words
A pipe protector for use in keeping concrete away from an end of a pipe as concrete is located around said pipe end and for use as a form in creating a cavity extending around said pipe adjacent to said pipe end, said pipe protector comprising: an imporous top adapted to be located opposite said pipe end, a dependent, imporous, cylindrical skirt attached to said top so as To extend downwardly from said top, the interior of said skirt being completely closed off by said top, said skirt being larger in diameter than said pipe and being sufficiently long so as to be adapted to fit along said pipe adjacent to said pipe end when said top is located opposite said pipe end, said skirt having a smooth exterior and a bottom diameter which is no larger than the diameter of the upper portion of said skirt anywhere above said bottom, at least three spacing fins attached to the interior of said skirt and extending radially inwardly from said skirt, said fins also being attached to said top so as to depend from said top, said fins being spaced from one another and terminating in aligned edges located in a locus of a circle corresponding to the diameter of said pipe and being capable of engaging said pipe adjacent to said pipe end so as to space said skirt from the periphery of the pipe adjacent to said pipe end, said fins being sufficiently flexible so as to be capable of absorbing forces applied to the exterior of said skirt so as to cushion said pipe against said forces and being sufficiently rigid to position said protector on said pipe so that said skirt is concentric with said pipe, recessed handle means in said top for use in removing said pipe protector from around said pipe end after concrete has been cast around said pipe protector, said top, said skirt, said fins and said handle are integral with one another and are formed of the same material, said material is a polyolefin polymer composition.
Claim 2
Dependent Claim 344 words
A pipe protector for use in keeping concrete away from an end of a pipe as concrete is located around said pipe end and for use as a form in creating a cavity extending around said pipe adjacent to said pipe end, said pipe protector comprising: an imporous top adapted to be located opposite said pipe end, a dependent, imporous, cylindrical skirt attached to said top so as To extend downwardly from said top, the interior of said skirt being completely closed off by said top, said skirt being larger in diameter than said pipe and being sufficiently long so as to be adapted to fit along said pipe adjacent to said pipe end when said top is located opposite said pipe end, said skirt having a smooth exterior and a bottom diameter which is no larger than the diameter of the upper portion of said skirt anywhere above said bottom, at least three spacing fins attached to the interior of said skirt and extending radially inwardly from said skirt, said fins also being attached to said top so as to depend from said top, said fins being spaced from one another and terminating in aligned edges located in a locus of a circle corresponding to the diameter of said pipe and being capable of engaging said pipe adjacent to said pipe end so as to space said skirt from the periphery of the pipe adjacent to said pipe end, said fins being sufficiently flexible so as to be capable of absorbing forces applied to the exterior of said skirt so as to cushion said pipe against said forces and being sufficiently rigid to position said protector on said pipe so that said skirt is concentric with said pipe, recessed handle means in said top for use in removing said pipe protector from around said pipe end after concrete has been cast around said pipe protector, said top, said skirt, said fins and said handle are integral with one another and are formed of the same material, said material is a polyolefin polymer composition.
Claim 3
Dependent Claim 41 words
A pipe protector as claimed in claim 1 wherein: said top has a recess located therein which extends to the periphery of said skirt, and said handle is located within said recess and is attached to said top within said recess.

References Cited (Backward Citations)

GB190727306A Cited
US1639786A Cited
US1867677A Cited
US2644978A Cited
US2913140A Cited
US3160175A Cited
US3420275A Cited
US3387749A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-07-15 1978-01-14 1978-07-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-07-15 1982-01-14 1982-07-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-07-15 1986-01-14 1986-07-16 $7700.00 Window Closed / Lapsed

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