Patent FR2335786B1 successfully refreshed from Google Patents.
US3964520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Connection between two inter engaging elements
Assignee: VERENIGDE MACHINEFABRIEKEN NV
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Filing: 1974-06-19
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Granted: 1976-06-22
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Expires: 1994-06-19
Abstract
Abstract A connection between the end of a cylindrical pipe inserted into a hole in a plate for connection there with, the connection being fluid-tight and capable of resisting a torsional couple; the connection is effected by first expanding the pipe-end with respect to the original pipe profile and by shaping the cross-section of the outer circumference of the expanded pipe-end and the inner wall of the hole in the plate such that the projection of the zone of contact upon a plane perpendicular to the axis of the pipe differs from a pure circular form.
Inventors
- 👤 Hendrik Bernhard Baas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:49
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/02; F16L41/00; F16L41/08; F16L41/086; Y; Y10; Y10S; Y10S285/00; Y10S285/901; Y10S285/915; Y10T; Y10T292/00; Y10T292/20; Y10T292/221
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
192 words
A fluid-tight connection between two interengaged elements comprising an elongated pipe element having an end, and a plate element with a hole receiving the end of the pipe element, said pipe element having a constant internal diameter, said end of the pipe element having a greater wall thickness and a greater outer diametral extent as compared to the remainder of the pipe element and having a non-circular shape in a plane perpendicular to the axis of the pipe element, said hole in the plate element being complementary in shape to the non-circular shape of the pipe end and receiving a first portion of said pipe end for transmitting torsional force therebetween, a lid on said pipe end to close the same, said lid having an outer surface of the same shape as the pipe end, a ring engaging both the lid and a second portion of the pipe end to transmit torsional force therebetween, and an annular seal between said lid and said pipe end and means holding said ring on said pipe end and holding said lid against said pipe end with said seal interposed therebetween to form a liquid-tight connector.
Claim 2
Dependent Claim
192 words
A fluid-tight connection between two interengaged elements comprising an elongated pipe element having an end, and a plate element with a hole receiving the end of the pipe element, said pipe element having a constant internal diameter, said end of the pipe element having a greater wall thickness and a greater outer diametral extent as compared to the remainder of the pipe element and having a non-circular shape in a plane perpendicular to the axis of the pipe element, said hole in the plate element being complementary in shape to the non-circular shape of the pipe end and receiving a first portion of said pipe end for transmitting torsional force therebetween, a lid on said pipe end to close the same, said lid having an outer surface of the same shape as the pipe end, a ring engaging both the lid and a second portion of the pipe end to transmit torsional force therebetween, and an annular seal between said lid and said pipe end and means holding said ring on said pipe end and holding said lid against said pipe end with said seal interposed therebetween to form a liquid-tight connector.
Claim 3
Dependent Claim
18 words
A connection as claimed in claim 1 comprising a weld between the pipe end and the plate element.
Claim 4
Dependent Claim
18 words
A connection as claimed in claim 1 comprising adhesive means between the pipe end and the plate element.
Claim 5
Dependent Claim
57 words
A connection as claimed in claim 1 wherein said non-circular shape of the pipe end is formed by respective first and second portions of greater and lesser radius from the axis of the pipe element, the radius of said second portion being at most not substantially greater than the radius of the remainder of the pipe element.
Claim 6
Dependent Claim
24 words
A connection as claimed in claim 1 wherein said non-circular shape includes linear segments which are radially inclined at an angle greater than 0°.
Claim 7
Dependent Claim
13 words
A connection as claimed in claim 5 wherein said linear segments extend radially.
Claim 8
Dependent Claim
16 words
A connection as claimed in claim 5 wherein said non-circular portion is of ziz-zag tooth shape.
Claim 9
Dependent Claim
18 words
A connection as claimed in claim 5 wherein said non-circular portion is of cylindrical shape with flats thereon.
Claim 10
Dependent Claim
18 words
A connection as claimed in claim 5 wherein said non-circular portion is of cylindrical shape with crenelated steps.
Claim 11
Dependent Claim
41 words
A connection as claimed in claim 1 wherein said plate element is relatively thin and said pipe end of greater wall thickness and outer diametral extent has a greater axial extent than the thickness of the plate element to project therebeyond.
References Cited (Backward Citations)
US1542266A
Cited
US1678946A
Cited
US2165621A
Cited
DE1229932B
Cited
US3771817A
Cited
US3787945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |