Patent US3830113A successfully refreshed from Google Patents.
US3830113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission belt structure
Assignee: Goodyear Tire and Rubber Co
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Filing: 1972-12-29
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Granted: 1974-08-20
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Expires: 1992-12-29
Abstract
Abstract A trapezoidal shaped power transmission belt of high longitudinal flexibility having a tension section, a compression section of less thickness than the tension section and a neutral axis section between the tension and compression sections. When the belt operates in grooved pulleys the greatest proportion of the driving contact is provided by the tension section rather than by the compression section. The pitch line of the belt is disposed below the transverse centerplane of the belt and the tension section includes a plurality of relatively deep transverse grooves or notches to increase the belt''s flexibility. The belts are particularly useful in compact variable speed drives equipped with relatively small diameter pulleys.
Inventors
- 👤 J Bruns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:27
CPC Classifications
F; F16; F16G; F16G5/00; F16G5/20; F16G5/12; F16G5/14
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
205 words
A power transmission belt of high longitudinal flexibility having a body of a generally trapezoidal cross-sectional configuration comprising: A. a first non-driving surface extending longitudiNally of the belt; B. a second non-driving surface spaced from said first surface on the opposite side of the belt therefrom with said first surface having a greater width than said second surface; C. a tension section adjacent to said first surface having a plurality of grooves therein extending generally transversely of the belt and penetrating for at least a substantial depth from said first surface into said tension section; D. a compression section adjacent to said second surface with said tension section having a greater thickness than said compression section; and E. a neutral axis section disposed between said tension and compression sections, said neutral axis section comprising at least one stress-resisting member therein extending generally longitudinally of the belt, said member being spaced from the bottom of said grooves in said tension section and the vertical distance between said first surface and the transverse center plane of said member being greater than the vertical distance between said second surface and the transverse center plane of said member with all said sections being formed into an integral composite structure.
Claim 2
Dependent Claim
205 words
A power transmission belt of high longitudinal flexibility having a body of a generally trapezoidal cross-sectional configuration comprising: A. a first non-driving surface extending longitudiNally of the belt; B. a second non-driving surface spaced from said first surface on the opposite side of the belt therefrom with said first surface having a greater width than said second surface; C. a tension section adjacent to said first surface having a plurality of grooves therein extending generally transversely of the belt and penetrating for at least a substantial depth from said first surface into said tension section; D. a compression section adjacent to said second surface with said tension section having a greater thickness than said compression section; and E. a neutral axis section disposed between said tension and compression sections, said neutral axis section comprising at least one stress-resisting member therein extending generally longitudinally of the belt, said member being spaced from the bottom of said grooves in said tension section and the vertical distance between said first surface and the transverse center plane of said member being greater than the vertical distance between said second surface and the transverse center plane of said member with all said sections being formed into an integral composite structure.
Claim 3
Dependent Claim
30 words
The belt as claimed in claim 1 wherein the depth of each said groove is from about 1/4 to about 1/2 of the height or total thickness of the belt.
Claim 4
Dependent Claim
27 words
The belt as claimed in claim 1 wherein the thickness of said compression section is at least 1/4 of the height or total thickness of the belt.
Claim 5
Dependent Claim
45 words
The belt as claimed in claim 1 wherein said compression section includes a plurality of grooves therein extending generally transversely of the belt, said grooves penetrating for a substantial depth into said compression section and terminating short of and being spaced from said stress-resisting member.
Claim 6
Dependent Claim
48 words
The belt as claimed in claim 1 wherein the ratio of the vertical distance between said first and second surfaces to the vertical distance between said second surface and the transverse centerplane of said member is greater than 2 to 1 and no greater than 4 to 1.
Claim 7
Dependent Claim
28 words
The belt as claimed in claim 5 wherein the depth of each said groove is from about 1/4 to about 1/2 of the total thickness of the belt.
Claim 8
Dependent Claim
31 words
The belt as claimed in claim 6 wherein the depth of the grooves is inversely proportional to the vertical distance between said first surface and the transverse centerplane of said member.
Claim 9
Dependent Claim
103 words
In a flexible endless trapezoidalshaped side-driving V-belt of integral composite construction comprising a major base and a minor base, and at least one strain-resisting member disposed on the pitch line of said belt, the improvement wherein the major base includes a plurality of notches therein extending generally transversely of the belt and penetrating for a substantial depth into the belt and terminating short of and being spaced from said member with the vertical distance between the pitch line of the belt and said major base being greater than the vertical distance between the longitudinal centerplane of the belt section and said major base.
Claim 10
Dependent Claim
103 words
In a flexible endless trapezoidalshaped side-driving V-belt of integral composite construction comprising a major base and a minor base, and at least one strain-resisting member disposed on the pitch line of said belt, the improvement wherein the major base includes a plurality of notches therein extending generally transversely of the belt and penetrating for a substantial depth into the belt and terminating short of and being spaced from said member with the vertical distance between the pitch line of the belt and said major base being greater than the vertical distance between the longitudinal centerplane of the belt section and said major base.
Claim 11
Dependent Claim
43 words
The belt as claimed in claim 8 wherein said minor base includes a plurality of notches therein extending generally transversely of the belt, said notches penetrating for a substantial depth into the belt and terminating short of and being spaced from said member.
Claim 12
Dependent Claim
42 words
The belt as claimed in claim 8 wherein the vertical distance between the major base and the bottom of said notches is no greater than 1/2 nor less than 1/4 of the vertical distance between said major base and said minor base.
Claim 13
Dependent Claim
39 words
The belt as claimed in claim 8 wherein the vertical distance between said major base and said pitch line is greater than 1/2 but less than 1/4 of the vertical distance between said major base and said minor base.
Claim 14
Dependent Claim
38 words
The belt as claimed in claim 11 wherein the vertical distance between the major base and the bottom of said notches varies inversely with the vertical distance between the major base and the pitch line of the belt.
Claim 15
Dependent Claim
190 words
In a belt drive assembly including the combination of a side-driving V-belt of flexible resilient material having a body of generally trapezoidal cross-section, a pair of grooved pulleys on which the belt is mounted, said belt comprising first and second spaced non-driving base portions with said first base portion having a greater width than said second base portion, a tension section adjacent to the first base portion and a compression section adjacent to the second base portion and a neutral axis section disposed between the tension and compression sections, said neutral axis section including a tension stress-resisting member embedded in the body of the belt, and the improvement wherein said first base portion includes a plurality of grooves therein extending transversely of the belt and penetrating for at least a substantial depth into the body and terminating short of and being spaced from said member and the vertical distance between the transverse centerplane of said member and said first base portion is greater than the vertical distance between the transverse centerplane of said member and said second base portion, thereby allowing greater flexibility as the belt moves over the pulleys.
Claim 16
Dependent Claim
190 words
In a belt drive assembly including the combination of a side-driving V-belt of flexible resilient material having a body of generally trapezoidal cross-section, a pair of grooved pulleys on which the belt is mounted, said belt comprising first and second spaced non-driving base portions with said first base portion having a greater width than said second base portion, a tension section adjacent to the first base portion and a compression section adjacent to the second base portion and a neutral axis section disposed between the tension and compression sections, said neutral axis section including a tension stress-resisting member embedded in the body of the belt, and the improvement wherein said first base portion includes a plurality of grooves therein extending transversely of the belt and penetrating for at least a substantial depth into the body and terminating short of and being spaced from said member and the vertical distance between the transverse centerplane of said member and said first base portion is greater than the vertical distance between the transverse centerplane of said member and said second base portion, thereby allowing greater flexibility as the belt moves over the pulleys.
Claim 17
Dependent Claim
42 words
The improvement as claimed in claim 13 wherein said second base incudes a plurality of grooves therein extending transversely of the belt, said grooves penetrating for a substantial depth into the belt and terminating short of and being spaced from said member.
Claim 18
Dependent Claim
80 words
The improvement as claimed in claim 13 wherein the tension section has a greater thickness than said compression section and a greater area of the sidewalls of said tension section is in wedging engagement with the pulley grooves than the area of said compression section so that the greatest proportion of the frictional driving contact of the belt in the pulley is accomplished by means of the flexible resilient material under tension than with the flexible resilient material under compression.
Claim 19
Dependent Claim
32 words
The improvement as claimed in claim 15 wherein the belt includes an envelope of rubber impregnated textile fabric material surrounding said body and the envelope is in engagement with the pulley grooves.
Claim 20
Dependent Claim
67 words
The improvement as claimed in claim 13 wherein the grooves in said first base portion have a depth varying from at least 1/4 to no greater than 1/2 of the total thickness of the belt and wherein the vertical distance between said second base portion and the transverse centerplane of said member is less than 1/2 but at least 1/4 of the total thickness of the belt.
Claim 21
Dependent Claim
32 words
The improvement as claimed in claim 17 wherein the depth of said grooves is directly proportional to the vertical distance between said second base portion and the transverse centerplane of said member.
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 |