Patent US4655546A successfully refreshed from Google Patents.
Patent US3738188A successfully refreshed from Google Patents.
US3738188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transmission belt and method of making same
Assignee: Mitsuboshi Belting Ltd
•
Filing: 1971-03-01
•
Granted: 1973-06-12
•
Expires: 1991-03-01
Abstract
Abstract An endless power transmission belt and method of making same is provided wherein the belt has a load-carrying section and a pair of opposed sides arranged adjacent opposite ends of the loadcarrying section with each of the sides having raised surface portions which are adapted to engage the walls of an associated sheave to control the traction properties of the belt operating in such sheave. The belt may also be provided with raised surface portions or a tooth-like configuration on the top and/or bottom thereof to provide increased belt flexibility.
Inventors
- 👤 R Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:59
CPC Classifications
F; F16; F16G; F16G5/00; F16G5/20; B; B29; B29C; B29C45/00; B29C45/14; B29C45/14631
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
65 words
An endless power transmission belt having a generally trapezoidal cross section comprising an inner compression section, an outer tension section, an intermediate load-carrying section having longitudinal strength cords, and a pair of opposed sides, each of said sides having raised surface portions which are adapted to engage a wall of an associated sheave to control the traction properties of said belt operating in said sheave.
Claim 2
Dependent Claim
65 words
An endless power transmission belt having a generally trapezoidal cross section comprising an inner compression section, an outer tension section, an intermediate load-carrying section having longitudinal strength cords, and a pair of opposed sides, each of said sides having raised surface portions which are adapted to engage a wall of an associated sheave to control the traction properties of said belt operating in said sheave.
Claim 3
Dependent Claim
21 words
A sides as set forth in claim 1 in which said raised surface portions are defined by recesses in said belt.
Claim 4
Dependent Claim
81 words
An endless power transmission belt having a generally trapezoidal cross section comprising an inner compression section, an outer tension section, an intermediate load-carrying section having longitudinally exteNding strength cords, and a pair of opposed sides, each of said sides having raised surface portions defined by recesses, and load-carrying section having end edges substantially flush with said recesses, said surface portions adapted to engage a wall of an associated sheave to control the traction properties of said belt operating in said sheave.
Claim 5
Dependent Claim
81 words
An endless power transmission belt having a generally trapezoidal cross section comprising an inner compression section, an outer tension section, an intermediate load-carrying section having longitudinally exteNding strength cords, and a pair of opposed sides, each of said sides having raised surface portions defined by recesses, and load-carrying section having end edges substantially flush with said recesses, said surface portions adapted to engage a wall of an associated sheave to control the traction properties of said belt operating in said sheave.
Claim 6
Dependent Claim
21 words
A belt as set forth in claim 3 in which said recesses extend completely across said sides in a transverse direction.
Claim 7
Dependent Claim
23 words
A belt as set forth in claim 4 in which each of said recesses is in the form of a substantially rectangular cutout.
Claim 8
Dependent Claim
23 words
A belt as set forth in claim 4 in which each of said recesses is in the form of a substantially trapezoidal cutout.
Claim 9
Dependent Claim
34 words
A belt as set forth in claim 3 in which each of said recesses extends from the outermost surface of said belt to a location approximately opposite the inner portion of said load-carrying section.
Claim 10
Dependent Claim
34 words
A belt as set forth in claim 3 in which each of said recesses extends from the innermost surface of said belt to a location approximately opposite the outer portion of said load-carrying section.
Claim 11
Dependent Claim
34 words
A belt as set forth in claim 3 further comprising a plurality of raised surface portions in the outer surface of said belt defined by additional recesses extending transversely of said entire outer surface.
Claim 12
Dependent Claim
25 words
A belt as set forth in claim 9 in which each of said additional recesses is adjoined at its opposite ends by associated side recesses.
Claim 13
Dependent Claim
37 words
A belt as set forth in claim 3 comprising a plurality of raised surface portions in the outer and inner surfaces of said belt defined by additional recesses extending transversely of said entire outer and inner surfaces.
Claim 14
Dependent Claim
38 words
A belt as set forth in claim 11 in which each outer recess is arranged opposite an associated bottom recess, said associated outer and inner recesses being interconnected at their opposite ends by a pair of side recesses.
Claim 15
Independent Claim
138 words
A method of making an endless V-belt comprising the steps of, providing a mold having an outer wall, an inner wall, and opposed annular walls extending between said outer and inner walls to define a mold cavity, said annular walls being adapted to define opposed sides of said belt with each annular wall having cutouts therein at regular intervals, each cutout being adapted to define a corresponding raised surface portion on the side of a belt formed in said mold cavity, placing load-carrying means for said belt in said cavity, injection molding an elastomeric material against said load-carrying means, and cooling and curing said elastomeric material to define said belt having said raised surface portions which are adapted to engage a wall of an associated sheave to control the traction properties of said belt operating in said sheave.
Claim 16
Independent Claim
138 words
A method of making an endless V-belt comprising the steps of, providing a mold having an outer wall, an inner wall, and opposed annular walls extending between said outer and inner walls to define a mold cavity, said annular walls being adapted to define opposed sides of said belt with each annular wall having cutouts therein at regular intervals, each cutout being adapted to define a corresponding raised surface portion on the side of a belt formed in said mold cavity, placing load-carrying means for said belt in said cavity, injection molding an elastomeric material against said load-carrying means, and cooling and curing said elastomeric material to define said belt having said raised surface portions which are adapted to engage a wall of an associated sheave to control the traction properties of said belt operating in said sheave.
Claim 17
Dependent Claim
64 words
A method as set forth in claim 13 in which said providing step comprises providing said mold having said annular walls which are inclined in a symmetrical manner toward said inner wall, said placing step comprising placing load-carrying means with its opposite edges supported on said annular walls to thereby precisely control the position thereof in said cavity and hence in its associated belt.
Claim 18
Dependent Claim
86 words
A method as set forth in claim 14 in which said outer wall has a tooth-like configuration which is adapted to define corresponding raised surface portions and recesses in the top of a belt made using said mold and during said injection molding step said cutouts in said annular walls define flow channels for elastomeric material which is bonded against the surface of said load-carrying means arranged adjacent said outer wall to thereby define said raised surface portions and recesses in the top of the belt.
Claim 19
Dependent Claim
49 words
A method as set forth in claim 14 in which said load-carrying means has a limited thickness which is determined solely by its strength requirements and said injection molding step comprising injection molding said elastomeric material against at least one side and opposite end edges of said load-carrying means.
Claim 20
Dependent Claim
35 words
A method As set forth in claim 16 in which said injection molding step comprises injection molding said elastomeric material against both sides of said load-carrying means as well as against said opposite end edges.
Claim 21
Dependent Claim
36 words
A method as set forth in claim 17 in which said injection molding step comprises injecting said elastomeric material into substantially all parts of said mold cavity in a substantially simultaneous manner through an annular slit.
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |