US4040670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of molding a skate wheel having a polyester core and a polyurethane case and the product thereof
Assignee: Perma Rain Irrigation Inc
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Filing: 1976-01-21
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Granted: 1977-08-09
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Expires: 1996-01-21
Abstract
Abstract A method of making a skate wheel is formed of a transparent, high strength rigid core having a high degree of clarity, which firmly secures and positions a pair of inner bearing races. A transparent wear resistant resilient wheel casing is injection molded completely around the core. The materials are chosen and molded so as to provide an entirely transparent wheel that exhibits the color of the core and in which a display imprinted upon the sides of the core is protected by the casing and made readily visible by light transmitted through both core and casing.
Inventors
- 👤 Maurice Charles Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:53
CPC Classifications
F; F16; F16C; F16C13/00; F16C13/006; A; A63; A63C; A63C17/00; A63C17/22; B; B29; B29C; B29C45/00; B29C45/14; B29C45/1459; B29C45/16; B29C45/1671; F16C2316/00; F16C2316/30
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
102 words
The method of molding a precision low cost wheet comprising the steps of molding a wheel core of butyrate polymer about wheel bearing parts to thereby position and lock said bearing parts within said wheel core, and molding a wheel casing of polyester polyurethane to substantially completely encase said core in close and intimate contact therewith and fusion bonding said core and casing together around the circumference of the core and inwardly along both sides of said core from the outermost circumference of said wheel toward the axis of said wheel, thereby to firmly and securely lock said casing to said core.
Claim 2
Independent Claim
102 words
The method of molding a precision low cost wheet comprising the steps of molding a wheel core of butyrate polymer about wheel bearing parts to thereby position and lock said bearing parts within said wheel core, and molding a wheel casing of polyester polyurethane to substantially completely encase said core in close and intimate contact therewith and fusion bonding said core and casing together around the circumference of the core and inwardly along both sides of said core from the outermost circumference of said wheel toward the axis of said wheel, thereby to firmly and securely lock said casing to said core.
Claim 3
Dependent Claim
34 words
The method of claim 1 wherein said core material has a high degree of transparency and a melting point such that the surface thereof softens upon contact with the casing material during injection thereof.
Claim 4
Dependent Claim
9 words
A wheel made by the method of claim 1.
Claim 5
Independent Claim
151 words
The method of molding a wheel comprising the steps of molding a wheel core of a transparent, rigid, high strength butyrate polymer about wheel bearing parts to thereby position and lock said bearing parts within said wheel and to provide a transparent core with at least one end extending from the periphery of the core toward the wheel axis, forming a visual display upon said core end, and molding a wheel casing of a transparent, abrasion resistant, resilient polyester polyurethane in close intimate contact with said core to extend around the circumference of said core and fusion bonding said core and casing together over said core end and over said visual display, said casing being molded over said core end with a thickness less than the thickness of said core, whereby said display upon said core side is visible at least in part by means of light transmitted through said core.
Claim 6
Independent Claim
151 words
The method of molding a wheel comprising the steps of molding a wheel core of a transparent, rigid, high strength butyrate polymer about wheel bearing parts to thereby position and lock said bearing parts within said wheel and to provide a transparent core with at least one end extending from the periphery of the core toward the wheel axis, forming a visual display upon said core end, and molding a wheel casing of a transparent, abrasion resistant, resilient polyester polyurethane in close intimate contact with said core to extend around the circumference of said core and fusion bonding said core and casing together over said core end and over said visual display, said casing being molded over said core end with a thickness less than the thickness of said core, whereby said display upon said core side is visible at least in part by means of light transmitted through said core.
Claim 7
Dependent Claim
9 words
A wheel made by the method of claim 4.
Claim 8
Independent Claim
89 words
The method of molding a precision low cost wheel comprising the steps of molding a wheel core of butyrate polymer, and molding a wheel casing of polyester polyurethane to substantially completely encase said core in close and intimate contact therewith and fusion bonding said core and casing together to extend integrally around the circumference of the core and inwardly along both sides of said core from the outermost circumference of said wheel toward the axis of said wheel, thereby to firmly and securely lock said casing to said core.
Claim 9
Independent Claim
89 words
The method of molding a precision low cost wheel comprising the steps of molding a wheel core of butyrate polymer, and molding a wheel casing of polyester polyurethane to substantially completely encase said core in close and intimate contact therewith and fusion bonding said core and casing together to extend integrally around the circumference of the core and inwardly along both sides of said core from the outermost circumference of said wheel toward the axis of said wheel, thereby to firmly and securely lock said casing to said core.
Claim 10
Dependent Claim
27 words
The method of claim 6 wherein said core material has a melting point such that the surface thereof softens upon contact with the casing material during molding.
Claim 11
Dependent Claim
9 words
A wheel made by the method of claim 6.
Claim 12
Dependent Claim
34 words
A molded wheel comprising, a rigid high strength wheel core of butyrate polymer, and a resilient, abrasion resistant casing of polyester polyurethane molded on and about said core and fusion bonded to said core.
Claim 13
Dependent Claim
34 words
A molded wheel comprising, a rigid high strength wheel core of butyrate polymer, and a resilient, abrasion resistant casing of polyester polyurethane molded on and about said core and fusion bonded to said core.
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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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |