US3750450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of articles
Assignee: Sankey Holding Ltd
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Filing: 1971-06-22
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Granted: 1973-08-07
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Expires: 1991-06-22
Abstract
Abstract The specification discloses a method of making a road wheel for a vehicle in which the material of the wheel has anisotropic properties. The wheel comprises a central portion, a peripheral or rim portion and a plurality of separate radial portions between the central portion and the rim portion. The specification describes how anisotropic properties can be obtained in the radial portions and the peripheral portion by causing the material to flow radially along the radial portions and peripherally around the peripheral portion during the formation of the wheel. This formation is effected by placing a billet of flowable material in a cavity and then moving selected elements of the cavity to produce the desired flow of the material. The wheel can be made of a thermoplastic, synthetic polymeric material with or without fibre reinforcement, a thermosetting, synthetic polymeric material with fibre reinforcement or a metal with or without fibre reinforcement.
Inventors
- 👤 H Sharp
- 👤 M Norrish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:13
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0032; B21; B21J; B21J13/00; B21J13/02; B21J13/025; B21K; B21K1/00; B21K1/28; B21K1/32; B29C; B29C43/00; B29C43/02; B29C43/32; B29C43/36; B29C2791/00; B29C2791/001; B29K; B29K2101/00; B29K2101/10; B29K2101/12; B29K2105/00; B29K2105/06; B29L; B29L2031/00; B29L2031/32; B29L2031/322; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49481; Y10T29/49492; Y10T29/49513
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
99 words
A method of making an article having a central portion a peripheral portion and a plurality of separate radial portions radiating from the central portion to the peripheral portion by causing flow of flowable material within a Cavity having central, radial and peripheral parts in which said central, radial and peripheral portions are respectively formed, the method comprising displacing material from the central part of the cavity into the radial parts thereof and then reducing the size of said radial parts to cause material therein to flow radially outwardly into the peripheral part around which the material flows peripherally.
Claim 2
Independent Claim
99 words
A method of making an article having a central portion a peripheral portion and a plurality of separate radial portions radiating from the central portion to the peripheral portion by causing flow of flowable material within a Cavity having central, radial and peripheral parts in which said central, radial and peripheral portions are respectively formed, the method comprising displacing material from the central part of the cavity into the radial parts thereof and then reducing the size of said radial parts to cause material therein to flow radially outwardly into the peripheral part around which the material flows peripherally.
Claim 3
Dependent Claim
75 words
A method according to claim 1 wherein, during the displacement of the material from the central part of the cavity into the radial parts thereof, the peripheral part of the cavity is held at a larger volume than its final volume at which the peripheral portion is formed and the peripheral part is subsequently reduced in size to its final volume, said reduction commencing no earlier than said reduction in size of the radial parts.
Claim 4
Dependent Claim
29 words
A method according to claim 2 wherein said reduction in size of the peripheral part of the cavity takes place after the reduction in size of the radial parts.
Claim 5
Dependent Claim
25 words
A method according to claim 1 wherein the material flows in T-shaped paths from the radial parts of the cavity into the peripheral part thereof.
Claim 6
Dependent Claim
32 words
A method according to claim 1 including the step of forming, between adjacent radial portions, webs by causing the material to flow biaxially into intermediate cavity parts between the radial cavity parts.
Claim 7
Dependent Claim
67 words
A method according to claim 5, wherein the cavity includes intermediate parts each defined between two adjacent radial parts, the central part and the peripheral part and wherein the method is carried out by bringing the intermediate parts to their final volumes no later than the displacement of the material from the central part into the radial parts, the material being simultaneously displaced into said intermediate parts.
Claim 8
Dependent Claim
202 words
Apparatus for forming from flowable material an article having a central portion, a peripheral portion, a plurality of separate radial portions radiating from the central portion, and a plurality of intermediate portions each defined between two adjacent radial portions and the central and peripheral portions the apparatus comprising a plurality of relatively movable elements which define a cavity having a central part, radial parts, a peripheral part and intermediate parts, each intermediate part being defined by two adjacent radial parts and the central and peripheral parts, for forming the central, radial, peripheral and intermediate portions respectively, the elements defining the radial parts being movable relative to other of said elements whereby the radial parts of said cavity may be varied in size independently of the other parts of the cavity, the elements defining the peripheral part of the cavity being movable relative to other of said elements whereby the peripheral part of the cavity may be varied in size independently of the other parts of the cavity, and the elements defining the intermediate parts being movable relative to other of said elements whereby the intermediate parts of the cavity may be varied in size independently of the other parts of the cavity.
Claim 9
Dependent Claim
202 words
Apparatus for forming from flowable material an article having a central portion, a peripheral portion, a plurality of separate radial portions radiating from the central portion, and a plurality of intermediate portions each defined between two adjacent radial portions and the central and peripheral portions the apparatus comprising a plurality of relatively movable elements which define a cavity having a central part, radial parts, a peripheral part and intermediate parts, each intermediate part being defined by two adjacent radial parts and the central and peripheral parts, for forming the central, radial, peripheral and intermediate portions respectively, the elements defining the radial parts being movable relative to other of said elements whereby the radial parts of said cavity may be varied in size independently of the other parts of the cavity, the elements defining the peripheral part of the cavity being movable relative to other of said elements whereby the peripheral part of the cavity may be varied in size independently of the other parts of the cavity, and the elements defining the intermediate parts being movable relative to other of said elements whereby the intermediate parts of the cavity may be varied in size independently of the other parts of the cavity.
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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |