US4679999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronous drive system and method of making the same
Assignee: Dayco Products LLC
•
Filing: 1986-07-08
•
Granted: 1987-07-14
•
Expires: 2006-07-08
Abstract
Abstract The combination of a toothed pulley and a toothed belt and method of making the same are provided. The toothed belt has teeth that serially mesh with cavities of the pulley that are respectively disposed between adjacent teeth thereof and that respectively have bottoms. Each belt tooth has a longitudinal cross-sectional configuration that defines a pair of spaced side faces that respectively have free end portions that are remote from adjacent roots thereof and that are spaced apart from each other by a bottom face of the tooth, each bottom face having a center. The teeth of the pulley and the belt are so constructed and arranged that each belt tooth would have the pair of spaced apart free end portions thereof compressed radially outwardly and inwardly toward each other by the respective adjacent pulley teeth while the bottom face thereof has its center spaced from the bottom of the cavity between those respective adjacent pulley teeth if that belt tooth is fully received in the cavity between those respective adjacent pulley teeth and those respective adjacent pulley teeth are just making contact with the land areas of the belt on each side of that belt tooth while being spaced from the respective roots of that belt tooth.
Inventors
- 👤 Robert E. Wetzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:55
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/17; F16H55/171; F16G; F16G1/00; F16G1/28; F16H7/00; F16H7/02; F16H7/023
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
211 words
In the combination of a toothed pulley and a toothed belt that has the teeth thereof serially mesh with cavities of said pulley that are respectively disposed between adjacent teeth thereof and that respectively have bottoms, each belt tooth having a longitudinal cross-sectional configuration that defines a pair of spaced side face means that respectively have free end portions thereof that are remote from adjacent root means thereof and that are spaced apart from each other by a bottom face means of said tooth, each bottom face means having a center, the improvement wherein said teeth of said pulley and said belt are so constructed and arranged that each belt tooth would have said pair of spaced apart free end portions thereof compressed radially outwardly and inwardly toward each other by the respective adjacent pulley teeth while said bottom face means thereof has its said center spaced from said bottom of the cavity between those respective adjacent pulley teeth if that belt tooth is fully received in the cavity between those respective adjacent pulley teeth and those respective adjacent pulley teeth are just making contact with the land areas of the belt on each side of that belt tooth while being spaced from the respective root means of that belt tooth.
Claim 2
Dependent Claim
211 words
In the combination of a toothed pulley and a toothed belt that has the teeth thereof serially mesh with cavities of said pulley that are respectively disposed between adjacent teeth thereof and that respectively have bottoms, each belt tooth having a longitudinal cross-sectional configuration that defines a pair of spaced side face means that respectively have free end portions thereof that are remote from adjacent root means thereof and that are spaced apart from each other by a bottom face means of said tooth, each bottom face means having a center, the improvement wherein said teeth of said pulley and said belt are so constructed and arranged that each belt tooth would have said pair of spaced apart free end portions thereof compressed radially outwardly and inwardly toward each other by the respective adjacent pulley teeth while said bottom face means thereof has its said center spaced from said bottom of the cavity between those respective adjacent pulley teeth if that belt tooth is fully received in the cavity between those respective adjacent pulley teeth and those respective adjacent pulley teeth are just making contact with the land areas of the belt on each side of that belt tooth while being spaced from the respective root means of that belt tooth.
Claim 3
Dependent Claim
15 words
The combination as set forth in claim 1 wherein each pulley tooth is substantially curvilinear.
Claim 4
Dependent Claim
44 words
The combination as set forth in claim 1 wherein each belt tooth has a longitudinal substantially trapezoidal cross-sectional configuration that defines said free end portions thereof as a pair of spaced free corner means thereof that are remote from said adjacent root means thereof.
Claim 5
Dependent Claim
15 words
The combination as set forth in claim 3 wherein each pulley tooth is substantially curvilinear.
Claim 6
Dependent Claim
34 words
The combination as set forth in claim 3 wherein each belt tooth has a substantially flat surface that extends between said pair of free corner means thereof and defines said bottom face means thereof.
Claim 7
Dependent Claim
30 words
The combination as set forth in claim 3 wherein each belt tooth has said opposed side face means thereof each comprising a substantially flat section and a substantially arcuate section.
Claim 8
Dependent Claim
46 words
The combination as set forth in claim 6 wherein each belt tooth has said flat section of each side face means thereof adjacent said root means thereof and said arcuate section of each side face means thereof defining at least part of said corner means thereof.
Claim 9
Dependent Claim
40 words
The combination as set forth in claim 7 wherein said arcuate section of each side face means of each belt tooth is defined by a radius having its center disposed intermediate said opposed side face means of that belt tooth.
Claim 10
Dependent Claim
27 words
The combination as set forth in claim 7 wherein said arcuate section of each side face means of each belt tooth joins with said flat section thereof.
Claim 11
Dependent Claim
35 words
The combination as set forth in claim 9 wherein each belt tooth has a substantially flat end surface that extends between said pair of free corner means thereof and defines said bottom face means thereof.
Claim 12
Dependent Claim
28 words
The combination as set forth in claim 10 wherein said flat end surface of each belt tooth joins with said arcuate sections of said side face means thereof.
Claim 13
Dependent Claim
15 words
The combination as set forth in claim 11 wherein each pulley tooth is substantially curvilinear.
Claim 14
Dependent Claim
21 words
The combination as set forth in claim 11 wherein the height of each belt tooth is approximately 0.130 of an inch.
Claim 15
Dependent Claim
24 words
The combination as set forth in claim 13 wherein the length of said radius of each belt tooth is approximately 0.060 of an inch.
Claim 16
Dependent Claim
23 words
The combination as set forth in claim 14 wherein the ptich of said teeth of dsaid belt is approximately 0.31496 of an inch.
Claim 17
Dependent Claim
220 words
In the method of making the combination of a toothed pulley and a toothed belt that has the teeth thereof serially mesh with cavities of said pulley that are respectively disposed between adjacent teeth thereof and that respectively have bottoms, each belt tooth having a longitudinal cross-sectional configuration that defines a pair of spaced side face means that respectively have free end portions thereof that are remote from adjacent root means thereof and that are spaced apart from each other by a bottom face means of said tooth, each bottom face means having a center, the improvement comprising the step of forming said teeth of said pulley and said belt to be so constructed and arranged that each belt tooth would have said pair of spaced apart free end portions thereof compressed radially outwardly and inwardly toward each other by the respective adjacent pulley teeth while said bottom face means thereof has its said center spaced from said bottom of the cavity between those respective adjacent pulley teeth if that belt tooth is fully received in the cavity between those respective adjacent pulley teeth and those respective adjacent pulley teeth are just making contact with the land areas of the belt on each side of that belt tooth while being spaced from the respective root means of that belt tooth.
Claim 18
Dependent Claim
220 words
In the method of making the combination of a toothed pulley and a toothed belt that has the teeth thereof serially mesh with cavities of said pulley that are respectively disposed between adjacent teeth thereof and that respectively have bottoms, each belt tooth having a longitudinal cross-sectional configuration that defines a pair of spaced side face means that respectively have free end portions thereof that are remote from adjacent root means thereof and that are spaced apart from each other by a bottom face means of said tooth, each bottom face means having a center, the improvement comprising the step of forming said teeth of said pulley and said belt to be so constructed and arranged that each belt tooth would have said pair of spaced apart free end portions thereof compressed radially outwardly and inwardly toward each other by the respective adjacent pulley teeth while said bottom face means thereof has its said center spaced from said bottom of the cavity between those respective adjacent pulley teeth if that belt tooth is fully received in the cavity between those respective adjacent pulley teeth and those respective adjacent pulley teeth are just making contact with the land areas of the belt on each side of that belt tooth while being spaced from the respective root means of that belt tooth.
Claim 19
Dependent Claim
21 words
The method as set forth in claim 16 and including the step of forming each pulley tooth to be substantially curvilinear.
Claim 20
Dependent Claim
50 words
The method as set forth in claim 16 and including the step of forming each belt tooth to have a longitudinal substantially trapezoidal cross-sectional configuration that defines said free end portions thereof as a pair of spaced free corner means thereof that are remote from said adjacent root means thereof.
Claim 21
Dependent Claim
21 words
The method as set forth in claim 18 and including the step of forming each pulley tooth to be substantially curvilinear.
Claim 22
Dependent Claim
40 words
The method as set forth in claim 18 and including the step of forming each belt tooth to have a substantially flat surface that extends between said pair of free corner means thereof and defines said bottom face means thereof.
Claim 23
Dependent Claim
36 words
The method as set forth in claim 18 and including the step of forming each belt tooth to have each said opposed side face means thereof comprise a substantially flat section and a substantially arcuate section.
Claim 24
Dependent Claim
52 words
The method as set forth in claim 21 and including the step of forming each belt tooth to have said flat section of each side face means thereof adjacent said root means thereof and said arcuate section of each side face means thereof defining at least part of said corner means thereof.
Claim 25
Dependent Claim
46 words
The method as set forth in claim 22 and including the step of forming said arcuate section of each side face means of each belt tooth to be defined by a radius having its center disposed intermediate said opposed side face means of that belt tooth.
Claim 26
Dependent Claim
33 words
The method as set forth in claim 22 and including the step of forming said arcuate section of each side face means of each belt tooth to join with said flat section thereof.
Claim 27
Dependent Claim
41 words
The method as set forth in claim 24 and including the step of forming each belt tooth to have a substantially flat end surface that extends between said pair of free corner means thereof and defines said bottom face means thereof.
Claim 28
Dependent Claim
34 words
The method as set forth in claim 25 and including the step of forming said flat end surface of each belt tooth to join with said arcuate sections of said side face means thereof.
Claim 29
Dependent Claim
21 words
The method as set forth in claim 26 and including the step of forming each pulley tooth to be substantially curvilinear.
Claim 30
Dependent Claim
27 words
The method as set forth in claim 26 and including the step of forming the height of each belt tooth to be approximately 0.130 of an inch.
Claim 31
Dependent Claim
30 words
The method as set forth in claim 28 and including the step of forming the length of said radius of each belt tooth to be approximately 0.060 of an inch.
Claim 32
Dependent Claim
29 words
The method as set forth in claim 29 and including the step of forming the pitch of said teeth of said belt to be approximately 0.31496 of an inch.
References Cited (Backward Citations)
US2987932A
Cited
US3026737A
Cited
US3404576A
Cited
US3756091A
Cited
US3968701A
Cited
US4007644A
Cited
US4148225A
Cited
US4337056A
Cited
US4233852A
Cited
US4403979A
Cited
US4343666A
Cited
US4427403A
Cited
US4504342A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |