US4717370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel pulley with dampening element
Assignee: INA Waelzlager Schaeffler OHG
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Filing: 1986-09-30
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Granted: 1988-01-05
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Expires: 2006-09-30
Abstract
Abstract A pulley comprising an outer rim provided with an outer running surface for a pulley belt and a hub concentric with the rim and a dampening element connected to the rim and hub in a non-rotating manner, the rim and hub being rigidly supported to one another in a radial and axial direction and the rim capable of moving at an angle to the hub in the circumferential direction, the rim and hub being made of a hard polymeric material and the dampening element being made of a softer polymeric material, the outer rim (3,15,22) and the hub (4,14,21) are connected to form an integral element by leaf spring-type ribs (6,16,23) having their least bending resistance moment around axes running parallel to the longitudinal axis of the pulley (1,13,20).
Inventors
- 👤 Harald Rohrig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:10
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/32; F16H55/36; F16H55/48; F16F; F16F15/00; F16F15/10; F16F15/12; F16F15/121; F16F15/124; F16H2055/366
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
129 words
A pulley comprising an outer rim provided with an outer running surface for a pulley belt and a hub concentric with the rim and a dampening element connected to the rim and hub in a non-rotating manner, the rim and hub being rigidly supported to one another in a radial and axial direction and the rim capable of moving at an angle to the hub in the circumferential direction, the rim and hub being made of a hard polymeric material and the dampening element being made of a softer polymeric material, the outer rim (3,15,22) and the hub (4,14,21) are connected to form an integral element by leaf spring-type ribs (6,16,23) having their least bending resistance moment around axes running parallel to the longitudinal axis of the pulley (1,13,20).
Claim 2
Dependent Claim
129 words
A pulley comprising an outer rim provided with an outer running surface for a pulley belt and a hub concentric with the rim and a dampening element connected to the rim and hub in a non-rotating manner, the rim and hub being rigidly supported to one another in a radial and axial direction and the rim capable of moving at an angle to the hub in the circumferential direction, the rim and hub being made of a hard polymeric material and the dampening element being made of a softer polymeric material, the outer rim (3,15,22) and the hub (4,14,21) are connected to form an integral element by leaf spring-type ribs (6,16,23) having their least bending resistance moment around axes running parallel to the longitudinal axis of the pulley (1,13,20).
Claim 3
Dependent Claim
30 words
A pulley of claim 1 wherein the dampening element(5,17,24) is essentially ring-shaped, and the ribs (6,16,23) are next to and on at least one side of the dampening element (5.17,24).
Claim 4
Dependent Claim
20 words
A pulley of claim 1 wherein a metallic reinforcement sleeve (7,18,25) is provided in the bore of the hub (4,14,21).
Claim 5
Dependent Claim
26 words
The pulley of claim 3 wherein the sleeve (7,18,25) is positively locked with the pulley by injection molding the material of the pulley (1,13,20) around it.
Claim 6
Dependent Claim
19 words
A pulley of claim 3 wherein the reinforcement sleeve (7,18,25) extends along the entire length of the hub (4,13,21).
Claim 7
Dependent Claim
160 words
A pulley comprising an outer rim provided with an outer running surface for a pulley belt and a hub concentric with the rim and a dampening element connected to the rim and hub in a non-rotating manner, the rim and hub being rigidly supported to one another in a radial and axial direction and the rim capable of moving at an angle to the hub in the circumferential direction, the rim and hub being made of a hard polymeric material and the dampening element being made of a softer polymeric material, the outer rim (3,15,22) and the hub (4,14,21) are connected to form an integral element by leaf spring-type ribs (6,16,23) having their least bending resistance moment around axes running parallel to the longitudinal axis of the pulley (1,13,20) and the hub (14,21) an/or the r einforcement sleeve (18,25) have at least one aperture (19,26) through which the softer polymeric material enters into the bore of the reinforcement sleeve (18,25).
Claim 8
Dependent Claim
160 words
A pulley comprising an outer rim provided with an outer running surface for a pulley belt and a hub concentric with the rim and a dampening element connected to the rim and hub in a non-rotating manner, the rim and hub being rigidly supported to one another in a radial and axial direction and the rim capable of moving at an angle to the hub in the circumferential direction, the rim and hub being made of a hard polymeric material and the dampening element being made of a softer polymeric material, the outer rim (3,15,22) and the hub (4,14,21) are connected to form an integral element by leaf spring-type ribs (6,16,23) having their least bending resistance moment around axes running parallel to the longitudinal axis of the pulley (1,13,20) and the hub (14,21) an/or the r einforcement sleeve (18,25) have at least one aperture (19,26) through which the softer polymeric material enters into the bore of the reinforcement sleeve (18,25).
Claim 9
Dependent Claim
20 words
A pulley of claim 6 wherein the softer polymeric material covers the entire bore wall of the reinforcement sleeve (18).
Claim 10
Dependent Claim
30 words
A pulley of claim 6 wherein the softer polymeric material enters into the bore of the reinforcement sleeve (25) through at least three apertures (26) to form centering lugs (27).
Claim 11
Dependent Claim
49 words
A pulley of claim 1 wherein the separating surface betwee the rim (3,15,22) and the dampening element (5,17,24) and/or the separating surface between the dampening element (5,17,24) and the hub (4,14,2 is formed in a non-circular shape to form a positive lock to prevent rotation between the said elements.
Claim 12
Dependent Claim
46 words
A pulley of claim 1 wherein the separating surface between the rim (3,15,22) and the dampening element (5,17,24) and/or the separating surface between the dampening element (5,15,24) and the hub (4,14,21) is formed so that the said elements are positive axially locked relative to one another.
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) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |