Patent US1337392A successfully refreshed from Google Patents.
Patent US4008911A successfully refreshed from Google Patents.
US4008911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joint assembly for plastic tubes
Assignee: Maruyasu Industries Co Ltd
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Filing: 1975-10-30
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Granted: 1977-02-22
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Expires: 1995-10-30
Abstract
Abstract A joint assembly for plastic tubes including an annular caulking element having a substantially triangular cross section, opposite annular ends thereof being adapted to be caulked into the outer peripheral surface of a plastic tube to be connected by the wedging action applied by a fastening structure, said caulking element being composed of two annular members arranged to be axially compressible toward each other while defining an annular groove therebetween, and an annular elastic sealing member being disposed in said groove and being adapted to be bulged out, radially inwardly to be pressed against the outer surface of said plastic tube under said axial compression of said two annular members.
Inventors
- 👤 Yoshiharu Kiyooka
- 👤 Ginji Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:22
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
197 words
A joint assembly for plastic tubes comprising a sleeve inserted into an end portion of a plastic tube for supporting the inner peripheral surface of said end portion, an annular caulking element having a substantially triangular cross section as a whole and composed of two annular members, each having a tapered outer surface, said annular caulking members being adapted to be mounted around said end portion, a body member having an annular seal for receiving a tapered outer peripheral surface of one of said annular members, and a cap nut having an annular seal for receiving the tapered outer surface of another of said annular members and adapted to be screwed onto said body member, said annular members cooperating with each other to define an annular groove of substantially rectangular cross section and an annular elastic sealing element of substantially circular cross section disposed in said groove, said two annular members being engagable with each other for reducing the width of said groove to a size smaller than the normal width of said annular elastic sealing element, the height of said annular groove being substantially the same as the normal height of said annular elastic sealing element.
Claim 2
Dependent Claim
197 words
A joint assembly for plastic tubes comprising a sleeve inserted into an end portion of a plastic tube for supporting the inner peripheral surface of said end portion, an annular caulking element having a substantially triangular cross section as a whole and composed of two annular members, each having a tapered outer surface, said annular caulking members being adapted to be mounted around said end portion, a body member having an annular seal for receiving a tapered outer peripheral surface of one of said annular members, and a cap nut having an annular seal for receiving the tapered outer surface of another of said annular members and adapted to be screwed onto said body member, said annular members cooperating with each other to define an annular groove of substantially rectangular cross section and an annular elastic sealing element of substantially circular cross section disposed in said groove, said two annular members being engagable with each other for reducing the width of said groove to a size smaller than the normal width of said annular elastic sealing element, the height of said annular groove being substantially the same as the normal height of said annular elastic sealing element.
Claim 3
Dependent Claim
94 words
The joint assembly of claim 1, wherein one of said annular members is formed with an annular shoulder portion at the one end thereof which defines said groove while the other of said annular members is formed with a sleeve portion projecting from the end portion thereof which defines said annular groove, said shouldered portion engaging with said sleeve portion in a manner for guiding relative axial movement of said two annular members while at the same time limiting the axial movement of said two annular members toward each other beyond a predetermined amount.
Claim 4
Dependent Claim
68 words
The joint assembly of claim 2, wherein said annular sealing element is bulged out radially inwardly by an amount sufficient to accomplish a required gas-tight contact between said annular sealing element and said plastic tube due to axial compression applied by said two annular members substantially before the axial compression of said two annular members is limited by said engagement between said shouldered portion and said sleeve portion.
References Cited (Backward Citations)
FR729401A
Cited
CH203347A
Cited
FR52948E
Cited
GB647999A
Cited
US2761704A
Cited
US3336061A
Cited
GB1146673A
Cited
GB1233372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-22 | 1980-08-23 | 1981-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-22 | 1984-08-23 | 1985-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-22 | 1988-08-23 | 1989-02-22 | $7700.00 | Window Closed / Lapsed |