US3730564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tapered compression end fitting
Assignee: Occidental Chemical Corp
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Filing: 1971-11-15
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Granted: 1973-05-01
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Expires: 1991-11-15
Abstract
Abstract This invention describes a unique end fitting for use with a single or multi-layer, braid-covered cast membrane tube of the type used in reverse osmosis fluid separation systems and the like. It can be used as a coupling between dissimilar tubing or two tubes of like characteristics.
Inventors
- 👤 W Bachle
- 👤 G Segovia
- 👤 Jones H Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:47
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
322 words
A high pressure resistant coupling for establishing a connection between a braided fiber reinforced plastic membrane tube having a wall thickness in the range of 4 to 12 mils and a further connecting member, said coupling comprising a plastically deformable sleeve, a compression nut, an end fitting and means for preventing relative rotation between the plastically deformable sleeve and the end fitting, said end fitting being sized for a portion of its length adjacent one end to be received within the inner diameter of the terminal portion of the reinforced plastic membrane tube and having a roughened surface provided with circumferential grooves about 0.005 inches deep, being threaded externally at a location intermediate its length to engage a compression nut, being formed with an internal tapered surface spaced radially outwardly from said sized portion and being fitted to engage means for preventing relative rotation between the plastically deformable sleeve and the end fitting, said plastically deformable sleeve being contoured to enclose the terminal portion of the reinforced plastic membrane tube, having a portion of its external surface tapered with the larger diameter being toward the threaded portion of the end fitting and engaging said internal tapered surface, being fitted to engage the means for preventing rotation between the end fitting and the plastically deformable sleeve and having an intermediate tapered section to assist in compressing the plastically deformable sleeve against the fiber reinforced plastic membrane tube, said compression nut being internally threaded to receive the threaded portion of the end fitting and having a tapered portion remote from said internally threaded portion which tapered portion is adjacent to and complementary to said intermediate tapered portion of the plastically deformable sleeve, said means for preventing relative rotation between the plastically deformable sleeve and the end fitting being a pin inserted radially in matching openings in the plastic deformable sleeve and the end fitting said sleeve having a length substantially greater than said nut.
Claim 2
Dependent Claim
322 words
A high pressure resistant coupling for establishing a connection between a braided fiber reinforced plastic membrane tube having a wall thickness in the range of 4 to 12 mils and a further connecting member, said coupling comprising a plastically deformable sleeve, a compression nut, an end fitting and means for preventing relative rotation between the plastically deformable sleeve and the end fitting, said end fitting being sized for a portion of its length adjacent one end to be received within the inner diameter of the terminal portion of the reinforced plastic membrane tube and having a roughened surface provided with circumferential grooves about 0.005 inches deep, being threaded externally at a location intermediate its length to engage a compression nut, being formed with an internal tapered surface spaced radially outwardly from said sized portion and being fitted to engage means for preventing relative rotation between the plastically deformable sleeve and the end fitting, said plastically deformable sleeve being contoured to enclose the terminal portion of the reinforced plastic membrane tube, having a portion of its external surface tapered with the larger diameter being toward the threaded portion of the end fitting and engaging said internal tapered surface, being fitted to engage the means for preventing rotation between the end fitting and the plastically deformable sleeve and having an intermediate tapered section to assist in compressing the plastically deformable sleeve against the fiber reinforced plastic membrane tube, said compression nut being internally threaded to receive the threaded portion of the end fitting and having a tapered portion remote from said internally threaded portion which tapered portion is adjacent to and complementary to said intermediate tapered portion of the plastically deformable sleeve, said means for preventing relative rotation between the plastically deformable sleeve and the end fitting being a pin inserted radially in matching openings in the plastic deformable sleeve and the end fitting said sleeve having a length substantially greater than said nut.
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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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |