Patent US4380442A successfully refreshed from Google Patents.
US4380442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible coupling
Assignee: Carl Freudenberg KG
•
Filing: 1981-02-20
•
Granted: 1983-04-19
•
Expires: 2001-02-20
Abstract
Abstract A rotary flexible coupling has two interleaved sets of input and output driver blocks connected to input and output flanges, respectively. First and second tires of inelastic material are spaced radially inwardly and radially outwardly from the blocks. Each block is connected to each tire by a cylindrical segment of a cylindrical layer of elastomeric material and torque is transmitted from the input blocks to the output blocks via the elastomeric layers and the tires.
Inventors
- 👤 Friedrich-Wilhelm Amsel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:51
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/50; F16D3/78
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
184 words
In a rotary flexible coupling having first and second sets of driver blocks, the blocks of each set being spaced equally apart around the axis of rotation, the blocks of the first set being interleaved between the blocks of the second set, each of the blocks having radial end faces and having inner and outer circumferential surfaces, a first set of fastening elements to connect the first set of blocks to an input flange to receive torque therefrom, and a second set of fastening elements to connect the second set of blocks to an output flange to transmit torque thereto, the invention comprising: a first tire of inelastic material spaced radially inwardly from the inner circumferential surfaces of the blocks; a second tire of inelastic material spaced radially outwardly from the outer circumferential surfaces of the blocks; an inner layer of elastomeric material comprising cylindrical segments joining the inner circumferential surface of each of the blocks with the first tire; and an outer layer of elastomeric material comprising cylindrical segments joining the outer circumferential surface of each of the blocks with the second tire.
Claim 2
Dependent Claim
184 words
In a rotary flexible coupling having first and second sets of driver blocks, the blocks of each set being spaced equally apart around the axis of rotation, the blocks of the first set being interleaved between the blocks of the second set, each of the blocks having radial end faces and having inner and outer circumferential surfaces, a first set of fastening elements to connect the first set of blocks to an input flange to receive torque therefrom, and a second set of fastening elements to connect the second set of blocks to an output flange to transmit torque thereto, the invention comprising: a first tire of inelastic material spaced radially inwardly from the inner circumferential surfaces of the blocks; a second tire of inelastic material spaced radially outwardly from the outer circumferential surfaces of the blocks; an inner layer of elastomeric material comprising cylindrical segments joining the inner circumferential surface of each of the blocks with the first tire; and an outer layer of elastomeric material comprising cylindrical segments joining the outer circumferential surface of each of the blocks with the second tire.
Claim 3
Dependent Claim
42 words
The invention according to claim 1 in which the thickness of the layers is approximately in the range of 0.7 to 2.5 times the mutual distance between the radial end faces of the driver blocks at the outside and inside circumference, respectively.
Claim 4
Dependent Claim
13 words
The invention according to claim 1 in which the layers are elastically pretensioned.
Claim 5
Dependent Claim
25 words
The invention according to claim 1 in which the circumferential surfaces of the driver blocks and the juxtaposed surfaces of the tires are spherical segments.
Claim 6
Dependent Claim
36 words
The invention according to claim 1 in which the angle which is enclosed by the respective radial end faces of the driver blocks has alternately a small and a large magnitude in a regularly recurring sequence.
Claim 7
Dependent Claim
24 words
The invention according to claim 5 in which the ratio of the large and the small angle is between approximately 1.5:1 to approximately 4:1.
Claim 8
Dependent Claim
32 words
The invention according to claim 1 in which the end faces of the driver blocks facing each other are provided at least on one side with a buffer layer of elastomeric material.
Claim 9
Dependent Claim
42 words
The invention according to claim 7 in which there is a buffer layer of elastomeric material on each radial surface of each of the blocks, and the surface of the buffer layers has at least one bulge extending in the circumferential direction.
References Cited (Backward Citations)
US2449654A
Cited
US2924082A
Cited
US2998717A
Cited
US3308637A
Cited
US3316737A
Cited
US3731499A
Cited
US3662568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-18 | 1986-10-18 | 1987-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-18 | 1990-10-18 | 1991-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-18 | 1994-10-18 | 1995-04-19 | $7700.00 | Window Closed / Lapsed |