US4880036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hose for refrigerating systems
Assignee: Yokohama Rubber Co Ltd
•
Filing: 1987-11-10
•
Granted: 1989-11-14
•
Expires: 2007-11-10
Abstract
Abstract A hose for transporting or otherwise handling refrigerants is disclosed which comprises an inner tube, an outer cover and a reinforcing layer disposed therebetween, the inner tube including a resinous inner wall and a rubbery outer peripheral wall. The inner peripheral wall is formed by a selected class of polymers having specified compositions, whereby the hose is rendered highly resistant to gas permeation and stress cracking and highly flexible and moisture-proofing.
Inventors
- 👤 Tetsu Kitami
- 👤 Jun Mito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:57
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/14; F16L11/00; F16L11/04; F16L11/08; Y; Y10; Y10S; Y10S138/00; Y10S138/07; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31728
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
100 words
A hose suitable for use in transporting refrigerants comprising an inner tube including a resinous inner peripheral wall and a rubbery outer peripheral wall, a reinforcing layer laminated over said outer peripheral wall, and an outer cover laminated over said reinforcing layer, said inner peripheral wall being formed by a polymeric composition comprising 40-80 percent by weight of nylon-6 or nylon-6/66, 5-30 percent by weight of nylon-11 and 10-40 percent by weight of a polyolefin, said hose having an improved balance of flexibility, resistance to stress cracking and resistance to gas permeation rendering it suitable for use in refrigerating systems.
Claim 2
Dependent Claim
100 words
A hose suitable for use in transporting refrigerants comprising an inner tube including a resinous inner peripheral wall and a rubbery outer peripheral wall, a reinforcing layer laminated over said outer peripheral wall, and an outer cover laminated over said reinforcing layer, said inner peripheral wall being formed by a polymeric composition comprising 40-80 percent by weight of nylon-6 or nylon-6/66, 5-30 percent by weight of nylon-11 and 10-40 percent by weight of a polyolefin, said hose having an improved balance of flexibility, resistance to stress cracking and resistance to gas permeation rendering it suitable for use in refrigerating systems.
Claim 3
Dependent Claim
35 words
A hose according to claim 1 wherein said outer peripheral wall is formed by a member selected from the group consisting of acrylonitrile-butadiene rubber, chlorosulfonated polyethylene rubber, ethylene-propylenediene rubber, butyl rubber and chlorinated butyl rubber.
Claim 4
Dependent Claim
34 words
A hose according to claim 1 wherein said inner peripheral wall has a thickness in the range of 0.05-1.5 mm, and said outer peripheral wall has a thickness in the range of 0.2-4.5 mm.
References Cited (Backward Citations)
US3062241A
Cited
US3561493A
Cited
US3584656A
Cited
US3805848A
Cited
US4243074A
Cited
US4510974A
Cited
US4613532A
Cited
US4657285A
Cited
US4659599A
Cited
US4633912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-13 | 1993-05-15 | 1993-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-13 | 1997-05-15 | 1997-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |