US3830679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm
Assignee: Dunlop Ltd
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Filing: 1972-08-09
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Granted: 1974-08-20
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Expires: 1992-08-09
Abstract
Abstract An annular wire reinforced rubber shaping diaphragm comprises a layer of rubber having embedded therein a plurality of individual metal wires, said wires being disposed substantially at right angles to the mid-circumferential plane of the diaphragm. An end ring is provided at each axially outer edge of said diaphragm, each end of each wire being anchored to its respective end ring, of which the following is a specification.
Inventors
- 👤 P Evans
- 👤 J Askam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:34
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/08; B29D30/20; B29D30/24; B29D30/26; B29D2030/2614; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/10; B29K2105/101; B29L; B29L2022/00; B29L2022/02; B29L2022/025
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
60 words
An annular wire reinforced rubber shaping diaphragm comprising a layer of rubber in which a plurality of individual wires are embedded, said wires being disposed substantially at right angles to the mid-circumferential plane of the diaphragm, and an end ring at each axially outer edge of said diaphragm, each end of each wire being anchored to its respective end ring.
Claim 2
Dependent Claim
60 words
An annular wire reinforced rubber shaping diaphragm comprising a layer of rubber in which a plurality of individual wires are embedded, said wires being disposed substantially at right angles to the mid-circumferential plane of the diaphragm, and an end ring at each axially outer edge of said diaphragm, each end of each wire being anchored to its respective end ring.
Claim 3
Dependent Claim
45 words
A diaphragm according to claim 1 comprising at least one valve communicating between the interior of the diaphragm and a surface of the diaphragm which comes into contact with an article to be shaped thereon to assist in the shaping and removal of said article.
Claim 4
Dependent Claim
20 words
A diaphragm according to claim 1 wherein each end of each of said wires may be provided with an enlargement.
Claim 5
Dependent Claim
16 words
A diaphragm according to claim 3 wherein said enlargement is in the form of a nipple.
Claim 6
Dependent Claim
35 words
A diaphragm according to claim 1 comprising at least one circumferentially extending rib provided in each of said end rings, axially extending slots being provided in said ribs in which said wires can be located.
Claim 7
Dependent Claim
33 words
A diaphragm according to claim 5 wherein two circumferentially extending ribs are provided in each of said end rings, axially extending slots provided in said ribs in which said wires can be located.
Claim 8
Dependent Claim
54 words
A diaphragm according to claim 6 wherein the axially inner of said ribs has a number of slots equal to the number of individual wires located in said diaphragm and the axially outer of said ribs has a number of slots equal to one half the number of individual wires located in said diaphragm.
Claim 9
Dependent Claim
39 words
A diaphragm according to claim 5 wherein a cam surface is provided axially outwardly of the diaphragm on said rib whereby engagement of the enlargement at each end of each wire with said surface assists in tensioning said wires.
Claim 10
Dependent Claim
41 words
A diaphragm according to claim 6 wherein a cam surface is provided axially outwardly of the diaphragm on the axially outer rib whereby engagement of the enlargement at each end of each wire with said surface assists in tensioning said wires.
Claim 11
Dependent Claim
35 words
A diaphragm according to claim 6 wherein each individual wire is located in a slot in the axially inner rib and said wires are located in pairs in a slot in the axially outer rib.
Claim 12
Dependent Claim
77 words
A diaphragm according to claim 10 wherein each of the wires is located in axially opposite slots in the axially inner ribs whereby the wires are disposed substantially in radial planes of said diaphragm; opposite ends of each wire being paired in the slots in the axially outer ribs, one end with an end of one adjacent wire and the other end with an end of the other adjacent wire on the opposite side of the wire.
Claim 13
Dependent Claim
54 words
A diaphragm according to claim 5 wherein the slots of said at least one rib are provided with a screw-threaded portion for location of a screw whereby during manufacture of the diaphragm the wires are tensioned by the screw forcing the enlargement of the wire over the cam face of the axially outer rib.
Claim 14
Dependent Claim
19 words
A diaphragm according to claim 12 wherein a metal pad is located between said paired ends of said wires.
Claim 15
Dependent Claim
22 words
A diaphragm according to claim 1 wherein said rubber of the diaphragm extends to the axially outer edge of said end rings.
Claim 16
Dependent Claim
32 words
A diaphragm according to claim 1 wherein said wires have washers thereon whereby during manufacture of the diaphragm the effective length of said wires may be altered by removal of the washers.
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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |