Patent US3673883A successfully refreshed from Google Patents.
US3673883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toothed power transmission belt and method of manufacturing the same
Assignee: Gates Rubber Co
•
Filing: 1971-02-03
•
Granted: 1972-07-04
•
Expires: 1991-02-03
Abstract
Abstract A toothed power transmission belt having teeth distributed on two of the surfaces of the belt and a method of manufacturing the belt are disclosed. The belt is composed of a pair of multilayered laminations bonded to each other with a reinforcing filament at least partially embedded in one of the laminations. The belt is manufactured by first covering the exterior surface of a longitudinally grooved mandrel with a skin coating of an elastomeric wear and abrasion resistant material. A highly viscous elastomeric tooth filler compound is then applied so as to fill the grooves in the skin coating corresponding to the grooves in the mandrel and cover the entire surface of the skin coating. A reinforcing filament is wound around the mandrel for approximately one-half the width of the covered portion of the mandrel in such a manner as to become at least partly embedded in the filler compound. The portion of the elastometric materials not having the reinforcing filament encircling it is reversed upon itself and pulled over the reinforcing filament to form the outer toothed surface of the belt. The entire assembly is then cured, stripped from the mandrel and trimmed. If desired, the resulting finished belt slab may be cut into belts of smaller width.
Inventors
- 👤 Gerald E Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:34
CPC Classifications
F; F16; F16G; F16G1/00; F16G1/28; B; B29; B29D; B29D29/00; B29D29/08; B29D29/085; F16G5/00; F16G5/16; F16G5/166
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
119 words
In a method for manufacturing a toothed belt having teeth on opposite surfaces, the steps of covering the surface of a grooved mandrel with a wear resistant material; covering the wear resistant material and filling the grooves in the wear resistant material corresponding to the mandrel grooves with an elastomEric filler compound to form a belt slab; winding a reinforcing filament around the mandrel for less than one-half the width of the belt slab; reversing the portion of the belt slab which does not have the reinforcing filament wound thereon upon the remaining portion of the belt slab to cover the reinforcing filament; curing the reversed belt slab; and cutting the belt slab into one or more finished belts.
Claim 2
Dependent Claim
119 words
In a method for manufacturing a toothed belt having teeth on opposite surfaces, the steps of covering the surface of a grooved mandrel with a wear resistant material; covering the wear resistant material and filling the grooves in the wear resistant material corresponding to the mandrel grooves with an elastomEric filler compound to form a belt slab; winding a reinforcing filament around the mandrel for less than one-half the width of the belt slab; reversing the portion of the belt slab which does not have the reinforcing filament wound thereon upon the remaining portion of the belt slab to cover the reinforcing filament; curing the reversed belt slab; and cutting the belt slab into one or more finished belts.
Claim 3
Dependent Claim
41 words
A method as recited in claim 1 wherein said reinforcing filament is wound around the mandrel and is in contact with said wear resistant material prior to the filling of the grooves in the wear resistant material with said filler compound.
Claim 4
Dependent Claim
43 words
A method as recited in claim 1 wherein the wear resistant material is covered by the filler compound prior to the winding of the reinforcing filament, and said filament when wound around the mandrel is embedded at least partially into the filler compound.
Claim 5
Dependent Claim
40 words
A method as recited in claim 1 wherein prior to the reversal of part of the belt slab on itself, the reinforcing filament is completely embedded in the filler compound and the resulting unfinished belt is at least partially cured.
Claim 6
Dependent Claim
30 words
A method as recited in claim 1 wherein a lubricating cement is applied to the outer surface of the filler compound just before the belt slab is reversed upon itself.
Claim 7
Dependent Claim
24 words
A method as recited in claim 5 wherein the wear resistant material, and filler compound are both at least partially composed of urethane rubber.
Claim 8
Dependent Claim
17 words
A method as recited in claim 1 wherein the wear resistant material is a stretchable, elastic fabric.
Claim 9
Dependent Claim
26 words
A method as recited in claim 1 wherein the mandrel is covered with a wear resistant material by electrostatically spraying an urethane rubber onto said mandrel.
Claim 10
Dependent Claim
95 words
In a method for manufacturing a toothed belt having teeth on two surfaces, the steps of covering the surface of a grooved mandrel with an elastomeric filler compound to form a belt slab; winding a reinforcing filament around the mandrel for less than one-half the width of the belt slab; reversing the belt slab upon itself so that the portion of the belt slab which does not have the reinforcing filament wound thereon covers the reinforcing filament; curing the belt slab; and cutting the reversed and cured belt slab into one or more finished belts.
Claim 11
Dependent Claim
95 words
In a method for manufacturing a toothed belt having teeth on two surfaces, the steps of covering the surface of a grooved mandrel with an elastomeric filler compound to form a belt slab; winding a reinforcing filament around the mandrel for less than one-half the width of the belt slab; reversing the belt slab upon itself so that the portion of the belt slab which does not have the reinforcing filament wound thereon covers the reinforcing filament; curing the belt slab; and cutting the reversed and cured belt slab into one or more finished belts.
Claim 12
Dependent Claim
69 words
A toothed belt having inner and outer teeth distributed therealong, composed of an inner and outer lamination bonded to each other and a substantially nonstretchable reinforcing filament at least partially embedded in one of the laminations at the region adjoining the other of the said laminations, and wherein each of said laminations is composed of an interior elastomeric body and an exterior layer of wear and abrasion resistant material.
Claim 13
Dependent Claim
69 words
A toothed belt having inner and outer teeth distributed therealong, composed of an inner and outer lamination bonded to each other and a substantially nonstretchable reinforcing filament at least partially embedded in one of the laminations at the region adjoining the other of the said laminations, and wherein each of said laminations is composed of an interior elastomeric body and an exterior layer of wear and abrasion resistant material.
Claim 14
Dependent Claim
26 words
A toothed belt according to claim 9 wherein the interior elastomeric body and the exterior layer which compose each lamination are of a different polyurethane rubbers.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |