US3581778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oblong hose
Assignee: Harvard Industries Inc
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Filing: 1969-08-14
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Granted: 1971-06-01
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Expires: 1989-08-14
Abstract
Abstract A hose is provided normally having an oblong inside transverse cross section and being of a material having elastic memory. In use, a source of fluid pressure coupled to one end of the hose will cause the hose''s normal oblong inside transverse cross section to substantially circularize thereby permitting efficient movement of the fluid therethrough. However, upon interruption or cessation of the fluid pressure, the elastic memory of the material causes the hose to substantially immediately return to its normal oblong or flattened cross-sectioned shape thereby expelling any residual fluid therein through the hose''s other end. Several processes for fabricating such hose are also disclosed.
Inventors
- 👤 Alfred Korejwa
- 👤 Walter J Layer
- 👤 Richard E Ruda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:53
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/08; F16L11/085; B; B29; B29C; B29C48/00; B29C48/15; B29C48/151; B29C48/152; B29C48/153; B29C48/03; B29C48/09; B29C48/13; B29C48/16; B29C48/18; B29C48/21
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
160 words
Hose means comprising: a longitudinally extending flexible tubular member adapted to be coupled to a source of fluid pressure and having at least one free end, said tubular member normally having an oblong inside transverse cross section for defining a flattened ribbonlike condition along substantially its entire length, said tubular member being adapted to assume a flexible nonflattened substantially cylindrical condition along substantially its entire length in response to a fluid of predetermined pressure introduced therein from said source, said tubular member being of a material having elastic memory, said elastic memory material providing means for urging said tubular member to substantially immediately return to said normal flattened ribbonlike condition upon the interruption of said fluid of predetermined pressure whereby any fluid tending to remain in said tubular member during said interruption is expelled through said at least one free end by the action of said elastic memory causing said tubular member to return to its normal flattened ribbonlike condition.
Claim 2
Dependent Claim
160 words
Hose means comprising: a longitudinally extending flexible tubular member adapted to be coupled to a source of fluid pressure and having at least one free end, said tubular member normally having an oblong inside transverse cross section for defining a flattened ribbonlike condition along substantially its entire length, said tubular member being adapted to assume a flexible nonflattened substantially cylindrical condition along substantially its entire length in response to a fluid of predetermined pressure introduced therein from said source, said tubular member being of a material having elastic memory, said elastic memory material providing means for urging said tubular member to substantially immediately return to said normal flattened ribbonlike condition upon the interruption of said fluid of predetermined pressure whereby any fluid tending to remain in said tubular member during said interruption is expelled through said at least one free end by the action of said elastic memory causing said tubular member to return to its normal flattened ribbonlike condition.
Claim 3
Dependent Claim
50 words
The hose means of claim 1 wherein said oblong inside transverse cross section of said tubular member when the latter is in its normal flattened ribbonlike condition is characterized by a major inside transverse dimension D1 and a minor inside transverse dimension D2 which is substantially less than dimension D1.
Claim 4
Dependent Claim
22 words
The hose means of claim 2 wherein the ratio of dimension D1 to dimension D2 is at least about 4 to 1.
Claim 5
Dependent Claim
37 words
The hose means of claim 1 wherein the modulus of elasticity of the material at 100 percent stress is in the range of from about 200 pounds per square inch to about 4,000 pounds per square inch.
Claim 6
Dependent Claim
20 words
The hose means of claim 1 wherein said tubular member has a substantially constant wall thickness and is substantially homogeneous.
Claim 7
Dependent Claim
41 words
The means of claim 5 wherein the wall thickness of said tubular member is from about 0.01 inch to about 0.25 inch and, when made circular said tubular member has an inside diameter from about three-eighths inch to about 1 inch.
Claim 8
Dependent Claim
21 words
The hose means of claim 1 wherein said elastic memory material is a thermoplastic extruded in said normal flattened ribbonlike condition.
Claim 9
Dependent Claim
15 words
The means of claim 7 wherein said thermoplastic elastic memory material is plasticized polyvinyl chloride.
Claim 10
Dependent Claim
22 words
The hose means of claim 1 wherein said elastic memory material is a thermosetting material completely cured in said flattened ribbonlike condition.
Claim 11
Dependent Claim
14 words
The hose means of claim 9 wherein said thermosetting elastic memory material is rubber.
Claim 12
Dependent Claim
18 words
The article defined in claim 1 wherein said hose means is nonreinforced and consists of said tubular member.
Claim 13
Dependent Claim
21 words
The article defined in claim 1 wherein said flexible tubular member is reinforced and includes a flexible reinforcing layer integral therewith.
Claim 14
Dependent Claim
75 words
The article defined in claim 1 wherein said tubular member is reinforced and functions as an inner core and said hose means includes a reinforcing layer surrounding and engaging said tubular member throughout the length thereof and capable of moving with said tubular member and an outer cover of material having elasTic memory surrounding and engaging said reinforcing layer throughout the length thereof and capable of moving with said tubular member and said reinforcing layer.
Claim 15
Dependent Claim
19 words
The hose apparatus of claim 13 wherein said outer cover also engages said tubular member through said reinforcing layer.
Claim 16
Dependent Claim
13 words
The hose apparatus of claim 13 wherein said reinforcing layer consists of nylon.
References Cited (Backward Citations)
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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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |