US5567019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheel for in-line roller skates
Assignee: US Farathane Corp
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Filing: 1994-09-23
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Granted: 1996-10-22
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Expires: 2014-09-23
Abstract
Abstract A wheel construction generally consisting of a hub section formed of a thermoplastic polyurethane material having a first durometer hardness and a rim section formed of a thermoplastic polyurethane material having a second durometer hardness less than the first durometer hardness, molded onto the hub section to form a molecularly adhered, integral hub and rim structure.
Inventors
- 👤 Irfan F. Raza
- 👤 Thomas F. Preczewski
- 👤 Ronald D. Walther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:54
CPC Classifications
A; A63; A63C; A63C17/00; A63C17/22; A63C17/223
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
48 words
A wheel construction comprising: a hub section formed of a thermoplastic polyurethane material having a first durometer hardness; and a tire section formed of a thermoplastic polyurethane material having a second durometer hardness, molded onto said hub section to form a molecularly adhered, integral hub and tire structure.
Claim 2
Dependent Claim
48 words
A wheel construction comprising: a hub section formed of a thermoplastic polyurethane material having a first durometer hardness; and a tire section formed of a thermoplastic polyurethane material having a second durometer hardness, molded onto said hub section to form a molecularly adhered, integral hub and tire structure.
Claim 3
Dependent Claim
21 words
A wheel construction according to claim 1 wherein said hub and tire sections are formed of a polyether based polyurethane material.
Claim 4
Dependent Claim
23 words
A wheel construction according to claim 1 wherein the hardness of said hub section is greater than the hardness of said tire section.
Claim 5
Dependent Claim
26 words
A wheel construction according to claim 1 wherein the durometer hardness of the hub section material is in the range of 65 to 78 Shore D.
Claim 6
Dependent Claim
20 words
A wheel construction according to claim 1 wherein the durometer hardness of the hub section material is 72 Shore D.
Claim 7
Dependent Claim
26 words
A wheel construction according to claim 1 wherein the durometer hardness of the tire section material is in the range of 28 to 35 Shore D.
Claim 8
Dependent Claim
20 words
A wheel construction according to claim 1 wherein the durometer hardness of the tire section material is 30 Shore D.
Claim 9
Dependent Claim
45 words
A wheel construction according to claim 1 wherein the durometer hardness of the hub section material is in the range of 65 to 78 Shore D and the durometer hardness of the tire section material is in the range of 28 to 35 Shore D.
Claim 10
Dependent Claim
33 words
A wheel construction according to claim 1 wherein the durometer hardness of the hub section material is 72 Shore D and the durometer hardness of the tire section material is 30 Shore D.
Claim 11
Dependent Claim
14 words
A wheel construction according to claim 1 wherein said hub section includes an additive.
Claim 12
Dependent Claim
14 words
A wheel construction according to claim 10 wherein said additive consists of fiberglass particles.
Claim 13
Dependent Claim
23 words
A wheel construction according to claim 10 wherein said additive consists of fiberglass particles in the range of 15% to 30% by weight.
Claim 14
Dependent Claim
41 words
A wheel construction according to claim 10 wherein the hub portion has a durometer hardness in the range of 65 to 78 Shore D and the tire section has a durometer hardness in the range of 28 to 35 Shore D.
Claim 15
Dependent Claim
14 words
A wheel construction according to claim 13 wherein the additive consists of fiberglass particles.
Claim 16
Dependent Claim
31 words
A wheel construction according to claim 10 wherein the hub section has a durometer hardness of 72 Shore D and the tire section has a durometer hardness of 30 Shore D.
Claim 17
Dependent Claim
14 words
A wheel construction according to claim 15 wherein the additive consists of fiberglass particles.
Claim 18
Dependent Claim
60 words
A wheel construction according to claim 1 wherein said hub section is provided with an annular, radially projecting portion, said annular portion is provided with a plurality of circumferentially spaced openings and said tire section encases said annular portion and includes portions received within said openings in said annular portion to physically interlock said tire section to said hub section.
Claim 19
Dependent Claim
41 words
A wheel construction according to claim 17 wherein said hub section has a durometer hardness in the range of 65 to 78 Shore D and said tire section has a durometer hardness in the range of 28 to 35 Shore D.
Claim 20
Dependent Claim
31 words
A wheel construction according to claim 17 wherein said hub section has a durometer hardness of 72 Shore D and said rim section has a durometer hardness of 30 Shore D.
Claim 21
Independent Claim
51 words
A method of making a wheel comprising: molding a hub section of the wheel from a thermoplastic polyurethane material having a first durometer hardness; and molding a tire section from a thermoplastic polyurethane material having a second durometer hardness onto said hub section to form a molecular adhesion between said sections.
Claim 22
Independent Claim
51 words
A method of making a wheel comprising: molding a hub section of the wheel from a thermoplastic polyurethane material having a first durometer hardness; and molding a tire section from a thermoplastic polyurethane material having a second durometer hardness onto said hub section to form a molecular adhesion between said sections.
Claim 23
Dependent Claim
31 words
A method according to claim 20 wherein said hub section is formed of a material having a durometer hardness greater than the durometer hardness of the material forming the tire section.
Claim 24
Dependent Claim
17 words
A method according to claim 20 wherein said sections are formed of a polyether based polyurethane material.
Claim 25
Dependent Claim
30 words
A method according to claim 20 wherein the processing temperature of the hub portion is approximately 400° F. and the processing temperature of the rim section is approximately 400° F.
Claim 26
Dependent Claim
84 words
An in-line skate comprising: a shoe having a sole portion; support means secured to said sole portion and depending therefrom; and a plurality of longitudinally spaced wheels mounted on axles supported on said support means, each of said wheels comprising a hub section formed of a thermoplastic polyurethane material having a first durometer hardness and a tire section formed of a thermoplastic polyurethane material having a second durometer hardness molded onto said hub section to form a molecularly adhered, integral hub and tire structure.
Claim 27
Dependent Claim
84 words
An in-line skate comprising: a shoe having a sole portion; support means secured to said sole portion and depending therefrom; and a plurality of longitudinally spaced wheels mounted on axles supported on said support means, each of said wheels comprising a hub section formed of a thermoplastic polyurethane material having a first durometer hardness and a tire section formed of a thermoplastic polyurethane material having a second durometer hardness molded onto said hub section to form a molecularly adhered, integral hub and tire structure.
Claim 28
Dependent Claim
41 words
An in-line skate according to claim 24 wherein the durometer hardness of the hub section material is in the range of 65 to 78 Shore D and the tire section material is in the range of 28 to 35 Shore D.
Claim 29
Dependent Claim
31 words
An in-line skate according to claim 24 wherein the durometer hardness of the hub section is 72 Shore D and the durometer hardness of the tire section is 30 Shore D.
Claim 30
Dependent Claim
55 words
An in-line skate according to claim 24 wherein the hub section of each wheel is provided with an annular, radially projecting portion, said annular portion is provided with a plurality of circumferentially spaced openings and the tire section thereof encases said annular portion and includes portions received in said openings provided in said annular portion.
Claim 31
Dependent Claim
50 words
An in-line skate according to claim 27 wherein the material of the hub section has a durometer hardness in the range of 65 to 78 Shore D and the material of the tire section of each wheel has a durometer hardness in the range of 28 to 35 Shore D.
Claim 32
Dependent Claim
43 words
An in-line skate according to claim 27 wherein the material of the hub section of each wheel has a durometer reading of 72 Shore D and the material of the tire section of each wheel has a durometer hardness of 30 Shore D.
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) | 1999-10-22 | 2000-04-22 | 2000-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-22 | 2004-04-22 | 2004-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-22 | 2008-04-22 | 2008-10-22 | $7700.00 | Window Closed / Lapsed |