US3729028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible high-strength wire-reinforced rubber hoses
Assignee: Orszagos Gumiipari Vallalat
•
Filing: 1971-06-10
•
Granted: 1973-04-24
•
Expires: 1991-06-10
Abstract
Abstract In a flexible high-strength fiber-reinforced rubber hose having a plurality of reinforcing wire plies, a well defined relation is established between the wrapping angles of the plies the essence of which is that the angle difference between the plies of higher pitches is smaller than the angle difference between the angles of plies of smaller pitches, while the angles satisfy well defined relations.
Inventors
- 👤 L Horvath
- 👤 G Gundisch
- 👤 M Arvai
- 👤 S Antal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:37
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/08; F16L11/088
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
A flexible high-strength fiber-reinforced rubber hose, comprising a plurality of load-bearing wire plies incorporated therein, each wire ply being formed of a multiplicity of individual resiliently flexible wires disposed in helical convolutions about the longitudinal axis of the hose, the outermost wire plies being at angles to the hose axis the difference between which amounts to 6* to 80* and the angles of three contiguous wire plies satisfying the following equation: Dj 1tan2 Alpha j 1 + Dj 1tan2 Alpha j 1 2 Djtan2 Alpha j where Dj 1, Dj, and Dj 1 are the diameters of the three contiguous wire plies, respectively, Alpha j 1, Alpha j and Alpha j 1 are the angles of the respective wire plies to the hose axis, and j is the serial number of any intermediate wire ply.
Claim 2
Dependent Claim
135 words
A flexible high-strength fiber-reinforced rubber hose, comprising a plurality of load-bearing wire plies incorporated therein, each wire ply being formed of a multiplicity of individual resiliently flexible wires disposed in helical convolutions about the longitudinal axis of the hose, the outermost wire plies being at angles to the hose axis the difference between which amounts to 6* to 80* and the angles of three contiguous wire plies satisfying the following equation: Dj 1tan2 Alpha j 1 + Dj 1tan2 Alpha j 1 2 Djtan2 Alpha j where Dj 1, Dj, and Dj 1 are the diameters of the three contiguous wire plies, respectively, Alpha j 1, Alpha j and Alpha j 1 are the angles of the respective wire plies to the hose axis, and j is the serial number of any intermediate wire ply.
Claim 3
Dependent Claim
25 words
In a flexible high-strength fiber-reinforced rubber hose as claimed in claim 1 the improvement of one of the wire plies being a helical steel spring.
Claim 4
Dependent Claim
28 words
In a flexible high-strength fiber-reinforced rubber hose as claimed in claim 1 the improvement of at least two contiguous wire plies having helical convolutions of the same hand.
Claim 5
Dependent Claim
72 words
A flexible high-strength fiber-reinforced rubber hose comprising two load-bearing wire plies incorporated therein, each wire ply being formed of a multiplicity of individual resiliently flexible wires disposed in helical convolutions about the longitudinal axis of the hose, both wire plies having angles to the hose axis the difference of which lies between 2* to 8*, the average of the angles being different by at least 10 minutes from the value of 35*16''.
Claim 6
Dependent Claim
72 words
A flexible high-strength fiber-reinforced rubber hose comprising two load-bearing wire plies incorporated therein, each wire ply being formed of a multiplicity of individual resiliently flexible wires disposed in helical convolutions about the longitudinal axis of the hose, both wire plies having angles to the hose axis the difference of which lies between 2* to 8*, the average of the angles being different by at least 10 minutes from the value of 35*16''.
Claim 7
Dependent Claim
127 words
In a flexible high-strength fiber-reinforced rubber hose as claimed in claim 1 the improvement in which the wrapping angles of all wire plies satisfy the following equation: sin2 Alpha 1 + sin2 Alpha 2 + . . . + sin2 Alpha n (n/3)- (0.21 . t . T)/(P . D) where Alpha 1, Alpha 2 . . . , Alpha n designate wrapping angles, n designates the number of reinforcing plies, t designates the distance between wire centers of a pair of contiguous convolutions in a fiber-reinforced ply in centimeters, T designates the sum of axial external forces loading the individual plies in kiloponds, P designates the forces appearing in the wire plies in kiloponds and D designates the mean diameter of the wire plies in centimeters.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |