Patent US3666563A successfully refreshed from Google Patents.
Patent US3866925A successfully refreshed from Google Patents.
US3866925A
Expired / Lapsed
US
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Device for increasing the elastic force of and reinforcing objects manufactured from an elastic material
Assignee: Forsheda Ideutveckling AB
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Filing: 1973-01-30
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Granted: 1975-02-18
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Expires: 1993-01-30
Abstract
Abstract The invention relates to objects composed of elastic material such as flattened helix or coil spring for a reinforcing or strengthening means wherein the reinforcing or strengthening means can be two helix or coil springs rolled together, one of the springs having a right-hand helix and the other a left-hand helix. If desired the strengthening and reinforcing means can be embedded within the elastic material such as a rubber sealing ring or it can be arranged on the outside of the object such as a hose clamp. Dependent upon the function and application of the object, the spring can have the form of a substantially flat ring, a hollow cylinder or a frustum of a hollow cone.
Inventors
- 👤 Sven-Erik Maimstrom
- 👤 Sten Sporre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:03
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3208; F16J15/3212; F16J15/3268; F16J15/3276; F16J15/34; F16J15/3436; F16J15/3456; F16L; F16L17/00; F16L17/02; F16L17/03; F16L17/032; F16L17/035; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249922
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
81 words
An object composed of elastic material and provided with strengthening means embedded within said elastic material, wherein the strengthening means comprise a spring element comprising a flattened helix or coil spring having its windings positioned within a plane substantially parallel with the longitudinal axis of the object, said windings being positioned to enclose portions of the elastic material so that the enclosed portions are subject to a compression when the object and the spring element are subject to a tensile stress.
Claim 2
Dependent Claim
81 words
An object composed of elastic material and provided with strengthening means embedded within said elastic material, wherein the strengthening means comprise a spring element comprising a flattened helix or coil spring having its windings positioned within a plane substantially parallel with the longitudinal axis of the object, said windings being positioned to enclose portions of the elastic material so that the enclosed portions are subject to a compression when the object and the spring element are subject to a tensile stress.
Claim 3
Dependent Claim
31 words
An object as claimed in claim 1, in which the spring element comprises two flattened helix springs rolled together, one having a right-hand helix and the other having a left-hand helix.
Claim 4
Dependent Claim
24 words
An object as claimed in claim 1, in which the spring element has in the unstressed state the shape of a substantially flat ring.
Claim 5
Dependent Claim
23 words
An object as claimed in claim 1, in which the spring element has in the unstressed state the shape of a hollow cylinder.
Claim 6
Dependent Claim
26 words
An object as claimed in claim 1, in which the spring element has in the unstressed state the shape of the frustum of a hollow cone.
Claim 7
Dependent Claim
43 words
An object as claimed in claim 1, the object constituting a sealing ring comprising an attachment and sealing portion formed as a hollow cylinder and a sealing portion hingedly connected with the attachment and sealing portion and formed as a substantially flat ring.
Claim 8
Dependent Claim
51 words
An object as claimed in claim 6, in which the attachment and sealing portion is adapted to be attached to and seal against the inner surface of a pipe socket and the sealing portion is adapted sealingly to engage the outer surface of a spigot end inserted into the pipe socket.
Claim 9
Dependent Claim
20 words
An object as claimed in claim 7, in which the attachment and sealing portion has an inwardly projecting convex shape.
Claim 10
Dependent Claim
24 words
An object as claimed in claim 8, in which the attachment portion as well as the sealing portion is provided with the spring elements.
Claim 11
Dependent Claim
35 words
An object as claimed in claim 1, the object constituting a sealing ring comprising a sealing portion and an annular attachment portion connected with each other, the spring element being embedded within the attachment portion.
Claim 12
Dependent Claim
22 words
An object as claimed in claim 10, in which the attachment portion and the sealing portion have a common cylindrical outer surface.
Claim 13
Dependent Claim
37 words
An object as claimed in claim 11, in which the attachment portion and the sealing portion are adapted to be positioned in grooves formed in the inner surface of an outer pipe concentrically surrounding an inner pipe.
Claim 14
Dependent Claim
30 words
An object as claimed in claim 12, in which the sealing portion is adapted to be positioned axially inside the attachment portion from the edge portion of the outer pipe.
Claim 15
Dependent Claim
39 words
An object as claimed in claim 10, in which the sealing portion has the section of an equilateral triangle having a point angle of 15* to 30*, and said sealing portion having its apex connected to said attachment portion.
Claim 16
Dependent Claim
29 words
An object as claimed in claim 10, in which the sealing portion and the attachment portion are connected with each other by means of a portion having reduced thickness.
Claim 17
Dependent Claim
31 words
An object as claimed in claim 10, in which the attachment portion has the section of a rectangle, the radial dimension thereof being less than half of the axial dimension thereof.
Claim 18
Dependent Claim
19 words
An object as claimed in claim 1, in which the spring element engages the outer surface of the object.
Claim 19
Dependent Claim
32 words
An object as claimed in claim 17, in which the spring element is fixed in an expanded state by means of removable spacing elements positioned between the coils of the spring element.
Claim 20
Dependent Claim
25 words
An object as claimed in claim 18, in which the spacing elements are connected with each other constituting a strip tearable from the spring element.
Claim 21
Dependent Claim
24 words
An object as claimed in claim 18, in which the spacing elements consist of a material meltable by means of heat or a solvent.
Claim 22
Dependent Claim
37 words
An object as claimed in claim 1, in which the spring element has a continuous wire extending along the spring element and connected with the coils thereof, said wire defining the tilting center of the spring element.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |