US3952618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extractor for plastic risers
Assignee: HONEY BEE TOOL Co
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Filing: 1975-05-23
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Granted: 1976-04-27
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Expires: 1995-05-23
Abstract
Abstract A device for extracting plastic risers from fittings such as polyvinyl-chloride water sprinkler pipes. The device has a shallow frusto-pyramidal shank having slightly concaval sides. The opposed edges of the shank lie at an angle of between 1.5° and 5° with respect to the longitudinal axis of the shank. The shank has a left-handed twist between 4° and 36° per inch of shank length. The shank is affixed to an extension rod which, in turn, has a handle to permit turning the device about its longitudinal axis.
Inventors
- 👤 Paul Seamon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:12
CPC Classifications
B; B25; B25B; B25B13/00; B25B13/48; B25B27/00; B25B27/14; B25B27/18; Y; Y10; Y10S; Y10S81/00; Y10S81/90
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
84 words
A device for extracting plastic risers from threaded fittings such as a tee located in a sprinkler pipe, said device comprising: a shallow, frustro-pyramidal shank having slightly concaval sides, each corner of said frustro-pyramidal shank being at an angle of between 1.5° and 5° with respect to the longitudinal axis of said shank, and said shank having a left-handed twist between 4° and 36° per inch of shank length; an extension rod affixed to said shank; and handle means affixed to said extension rod.
Claim 2
Independent Claim
84 words
A device for extracting plastic risers from threaded fittings such as a tee located in a sprinkler pipe, said device comprising: a shallow, frustro-pyramidal shank having slightly concaval sides, each corner of said frustro-pyramidal shank being at an angle of between 1.5° and 5° with respect to the longitudinal axis of said shank, and said shank having a left-handed twist between 4° and 36° per inch of shank length; an extension rod affixed to said shank; and handle means affixed to said extension rod.
Claim 3
Dependent Claim
23 words
The device of claim 1 wherein each of said corners is at an angle of about 3.5° with respect to said center axis.
Claim 4
Dependent Claim
16 words
The device of claim 1 wherein said twist is about 12° per inch of shank length.
Claim 5
Dependent Claim
83 words
The device of claim 1 wherein said device is adapted for use on a 1/2 inch soft plastic riser and each corner of said shank has an angle of about 3.5° with respect to the center axis thereof, the distance between the corners of said shank at its bottom terminus is 1/2 inch, said shank extends a distance of about 21/2 inches and the distance between opposed corners of said shank at a point 21/2 inches from said terminus is about 3/4 inch.
Claim 6
Dependent Claim
14 words
The device of claim 4 wherein said extension rod is about 31/2 inches long.
Claim 7
Dependent Claim
13 words
The device of claim 1 wherein said device is fabricated from sand-cast metal.
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) | 1979-04-27 | 1979-10-27 | 1980-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-27 | 1983-10-27 | 1984-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-27 | 1987-10-27 | 1988-04-27 | $7700.00 | Window Closed / Lapsed |