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US3845975A Expired / Lapsed US ⏱️ 0.0 years remaining

Hinged pipe joint

Assignee: IHC Holland NV
•
Filing: 1973-03-09
•
Granted: 1974-11-05
•
Expires: 1993-03-09
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Abstract

Abstract A hinged pipe joint comprises at least one flexible sleeve surrounded by a cage-like cardan structure. The joint structure makes it difficult to remove and replace the flexible sleeve. The invention provides a housing to which the hinge structure is connected, with a flange secured therein to which a flange of the flexible sleeve is connected. The housing has a closable access door in alignment with the axis of the flange, so that when the cover of the door is open, the detached flexible sleeve and the flange may be removed and replaced through the door. If two flexible sleeves are connected to the housing at angles to each other, then two doors are provided. The flanges have curved portions secured thereto that serve as continuations of the pipeline within the housing.

Inventors

  • 👤 Heijst W Van

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 01:26
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/02; F16L27/00; F16L27/02

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 84 words
In a hinged pipe joint comprising a pair of rigid pipes, at least one flexible sleeve between the rigid pipes, and hinge structure interconnecting the rigid pipes and surrounding the flexible sleeve; the improvement comprising a housing, a flange secured in said housing, one end of said flexible sleeve being secured to said flange, said hinge structure being secured to said housing, at least one door through said housing in line with the axis of said flange, and a removable cover closing said opening.
Claim 2
Dependent Claim 84 words
In a hinged pipe joint comprising a pair of rigid pipes, at least one flexible sleeve between the rigid pipes, and hinge structure interconnecting the rigid pipes and surrounding the flexible sleeve; the improvement comprising a housing, a flange secured in said housing, one end of said flexible sleeve being secured to said flange, said hinge structure being secured to said housing, at least one door through said housing in line with the axis of said flange, and a removable cover closing said opening.
Claim 3
Dependent Claim 27 words
A pipe joint as claimed in claim 1, said flange having a rigid pipe section secured thereto in a continuation of said flexible sleeve within said housing.
Claim 4
Dependent Claim 13 words
A pipe joint as claimed in claim 2, said pipe section being curved.
Claim 5
Dependent Claim 68 words
A pipe joint as claimed in claim 1, there being a pair of said flexible sleeves one secured to each said rigid pipe and both secured to different sides of said housing by two said flanges, the axes of said flanges being disposed at an angle to each other, there being a said door and cover in said housing in line with the axis of eAch said flange.
Claim 6
Dependent Claim 28 words
A pipe joint as claimed in claim 4, said flanges having curved pipe sections secured thereto within said housing, said pipe sections meeting each other in endwise abutment.

References Cited (Backward Citations)

US399747A Cited
US1305491A Cited
US1626490A Cited
US1614770A Cited
US1834742A Cited
US2911235A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-11-04 1978-05-06 1978-11-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-11-04 1982-05-06 1982-11-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-11-04 1986-05-06 1986-11-05 $7700.00 Window Closed / Lapsed

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