Patent US3751075A successfully refreshed from Google Patents.
US3751075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling members for plastic pipes and fittings useful therewith
Assignee: RUBINSTEIN RUHAMA
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Filing: 1971-03-22
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Granted: 1973-08-07
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Expires: 1991-03-22
Abstract
Abstract A coupling member particularly for plastic pipes is formed with a through-going bore and with an annular shoulder dividing the member into a short part and a long part separated by the shoulder, the shoulder being defined by a pair of intersecting annular walls forming a sharp peripheral edge at their juncture. The annular wall at the long part side of the shoulder is substantially at right angles to the longitudinal axis of the member, and the annular wall at the short side of the shoulder is formed with a concave taper. Various applications of such coupling member are described, including an arrangement wherein it is attached to the end of a flexible tube, an arrangement wherein it is mounted in a bore in the wall of a pipe, and a further arrangement wherein it is received in a bore of a fitting for coupling to a water sprinkler.
Inventors
- 👤 P Rosenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:01
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/26; F16L47/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
184 words
A coupling for pipes, comprising, a coupling member formed with an axial through-going bore and with an outer annular shoulder closer to one end of the member than to its opposite end, said shoulder dividing the member to a short part and a long part, the external diameter of said short part increasing gradually towards said shoulder, the external diameter of said long part increasing more gradually than said short part towards said shoulder, said shoulder having a sharp peripheral edge with the wall joining same to the long part side of said shoulder being substantially at right angles to the longitudinal axis of the tubular member; and a pipe having a bore in a wall thereof, said coupling member being mounted in said bore of the pipe, the walls of the bore engaging the long part of the coupling member and frictionally holding the coupling member within the bore, the short part and the annular shoulder of the coupling member both being disposed within said pipe, the long part of the coupling member passing through the bore and projecting exteriorly of the pipe.
Claim 2
Dependent Claim
184 words
A coupling for pipes, comprising, a coupling member formed with an axial through-going bore and with an outer annular shoulder closer to one end of the member than to its opposite end, said shoulder dividing the member to a short part and a long part, the external diameter of said short part increasing gradually towards said shoulder, the external diameter of said long part increasing more gradually than said short part towards said shoulder, said shoulder having a sharp peripheral edge with the wall joining same to the long part side of said shoulder being substantially at right angles to the longitudinal axis of the tubular member; and a pipe having a bore in a wall thereof, said coupling member being mounted in said bore of the pipe, the walls of the bore engaging the long part of the coupling member and frictionally holding the coupling member within the bore, the short part and the annular shoulder of the coupling member both being disposed within said pipe, the long part of the coupling member passing through the bore and projecting exteriorly of the pipe.
Claim 3
Dependent Claim
42 words
A coupling as defined in claim 1, further including a tubular fitting formed with a through-going bore, the wall of said fitting bore engaging the free end of the long part of the coupling member and frictionally holding the coupling member therein.
Claim 4
Dependent Claim
79 words
A coupling as defined in claim 2, in combination with a second coupling member of identical construction as the first mentioned coupling member and attached to the end of a flexible tube, the end of the flexible tube tightly enclosing both the short part of the second coupling member and the annular shoulder thereof, the long part of the secOnd coupling member projecting exteriorly of the flexible tube and being frictionally held within the bore of the tubular fitting.
Claim 5
Dependent Claim
57 words
A coupling as defined in claim 3, wherein the opposite end of said flexible tube has attached thereto a third coupling member identical with the first-mentioned coupling member, and a second fitting formed with a through-going bore, the walls of said latter bore engaging the long part of said third coupling member and frictionally holding same therein.
Claim 6
Dependent Claim
107 words
A coupling as defined in claim 4, wherein said second fitting comprises a cylindrical housing at one end formed with external threads for coupling a sprinkler thereto, said through-going bore leading to said cylindrical housing and being counter-sunk at the end thereof opposite to the cylindrical housing and the remainder being tapered, decreasing in diameter towards said cylindrical housing, said fitting being further formed with a blind bore extending from said opposite end of the fitting parallel to and laterally of said through-going bore, the walls of said blind bore adapted to engage a mounting rod for supporting said second fitting and the sprinkler when coupled thereto.
Claim 7
Dependent Claim
123 words
A fitting comprising a cylindrical housing at one end formed with external threads for coupling a sprinkler thereto, said fitting being formed with a through-going bore leading from the opposite end to said cylindrical housing, the bore being counter-sunk at said opposite end and the remainder being tapered, decreasing in diameter, towards said cylindrical housing, the tapered walls of said bore adapted to engage the tapered end of a coupling member for frictionally holding same therein, said fitting being further formed with a blind bore extending from said opposite end of the fitting parallel to and laterally of said through-going bore, the walls of said blind bore adapted to receive a mounting rod for supporting said fitting and the sprinkler when coupled thereto.
Claim 8
Dependent Claim
123 words
A fitting comprising a cylindrical housing at one end formed with external threads for coupling a sprinkler thereto, said fitting being formed with a through-going bore leading from the opposite end to said cylindrical housing, the bore being counter-sunk at said opposite end and the remainder being tapered, decreasing in diameter, towards said cylindrical housing, the tapered walls of said bore adapted to engage the tapered end of a coupling member for frictionally holding same therein, said fitting being further formed with a blind bore extending from said opposite end of the fitting parallel to and laterally of said through-going bore, the walls of said blind bore adapted to receive a mounting rod for supporting said fitting and the sprinkler when coupled thereto.
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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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |