Patent US3866725A successfully refreshed from Google Patents.
US3866725A
Expired / Lapsed
US
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Load-dependent braking device for conveying systems
Assignee: Inventio AG
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Filing: 1973-07-23
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Granted: 1975-02-18
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Expires: 1993-07-23
Abstract
Abstract A load-dependent braking device for conveying systems having a primary brake with a fixedly adjusted braking moment and a secondary brake with variable braking moment, the braking moment of the secondary brake being adjusted in dependence on the loading moment acting upon a drive device or machine for the attainment of a braking deceleration or retardation independent of load. A rotatable brake part of the primary brake is rigidly connected with a fixed brake part of the secondary brake. A rotatable brake part of the secondary brake, which can be pressed by brake linings or pads against the fixed brake part through the action of spring pressure, is raised or lifted-off as a function of the change of speed occurring during the braking of the drive machine by a rod or linkage arrangement pressed by means of spring force against a setting cam. The setting cam is arranged on a flywheel or inertial disk mounted to be freely rotatable upon a drive shaft of the drive device and actuates the rod arrangement in proportion to the angle of displacement between the flywheel disk and the drive shaft in opposition to the spring force.
Inventors
- 👤 Wilfried Greutter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:04
CPC Classifications
F; F16; F16D; F16D59/00; B; B66; B66B; B66B29/00; F16D63/00; F16D63/004
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
251 words
A load-dependent braking device for conveying systems comprising a primary brake possessing a fixedly adjusted braking moment, a secondary brake with a variable braking moment, the braking moment of the secondary brake being adjusted as a function of the loading moment acting upon a drive means for the attainment of a braking deceleration independent of load, the improvement comprising said primary brake having a rotatable brake part, the secondary brake having a fixed brake part and a rotatable brake part, the rotatable brake part of the primary brake being rigidly connected with the fixed brake part of said secondary brake, brake pad means, resilient means for exerting a spring pressure for urging the rotatable brake part of the secondary brake through the agency of the brake pad means against the fixed brake part of the secondary brake, setting cam means, a rod arrangement, means for providing a spring force for urging the rod arrangement against the Setting cam means, said rod arrangement serving to lift-off the rotatable brake part of the secondary brake as a function of the change of speed which occurs upon braking of the drive means, said drive means including a drive shaft, a flywheel disk at which there is arranged said setting cam means, means for mounting said flywheel disk to be freely rotatable at the drive shaft, said setting cam means actuating the rod arrangement in opposition to the spring force in proportion to the angle of displacement between the flywheel disk and the drive shaft.
Claim 2
Dependent Claim
251 words
A load-dependent braking device for conveying systems comprising a primary brake possessing a fixedly adjusted braking moment, a secondary brake with a variable braking moment, the braking moment of the secondary brake being adjusted as a function of the loading moment acting upon a drive means for the attainment of a braking deceleration independent of load, the improvement comprising said primary brake having a rotatable brake part, the secondary brake having a fixed brake part and a rotatable brake part, the rotatable brake part of the primary brake being rigidly connected with the fixed brake part of said secondary brake, brake pad means, resilient means for exerting a spring pressure for urging the rotatable brake part of the secondary brake through the agency of the brake pad means against the fixed brake part of the secondary brake, setting cam means, a rod arrangement, means for providing a spring force for urging the rod arrangement against the Setting cam means, said rod arrangement serving to lift-off the rotatable brake part of the secondary brake as a function of the change of speed which occurs upon braking of the drive means, said drive means including a drive shaft, a flywheel disk at which there is arranged said setting cam means, means for mounting said flywheel disk to be freely rotatable at the drive shaft, said setting cam means actuating the rod arrangement in opposition to the spring force in proportion to the angle of displacement between the flywheel disk and the drive shaft.
Claim 3
Dependent Claim
145 words
The load-dependent braking device as defined in claim 1, wherein the secondary brake is constructed as a disk brake and possesses a carrier disk connected with said drive shaft, said rod arrangement incorporating pressure pin means, said carrier disk having a projection, a pressure disk displaceably mounted upon said projection of said carrier disk, said rotatable brake part of said secondary brake comprising a brake disk provided with said pressure pad means, said brake disk and said pressure pad means being fixedly clampable under the action of said resilient means between said pressure disk and said carrier disk against the action of a clearing force which can be exerted via said pressure pin means piercingly extending through the carrier disk and engaging with the pressure disk, at least either said pressure disk or said carrier disk defining said rotatable brake part of said secondary brake.
Claim 4
Dependent Claim
24 words
The load-dependent braking device as defined in claim 2, wherein said rotatable brake part of said secondary brake comprises at least said pressure disk.
Claim 5
Dependent Claim
26 words
The load-dependent braking device as defined in claim 2, wherein said rotatable brake part of said secondary brake comprises both said pressure disk and carrier disk.
Claim 6
Dependent Claim
111 words
The load-dependent braking device as defined in claim 2, wherein said rod arrangement includes angle lever means rotatably mounted upon said carrier disk, said setting cam means arranged at the flywheel disk serving to actuate the pressure pin means of the secondary brake via said angle lever means, each angle lever means comprising a first lever arm and a second lever arm for actuation of the pressure pin means, a roller mounted at said first lever arm, said spring force providing means comprising a spring engaging with the second lever arm of the angle lever means, said spring pushing the angle lever means against the setting cam means via the roller.
Claim 7
Dependent Claim
90 words
The load-dependent braking device as defined in claim 2, further including an arm member secured to the carrier disk, said pressure pin means being displaceably mounted at said arm member, the end of the pressure pin means confronting the flywheel disk carrying a rotatable roller, said spring force providing means comprising a spring for pressing the pressure pin means via the rotatable roller against the setting cam means of the flywheel disk, a projection provided for pressure pin means, said spring being arranged between the carrier disk and said projection.
Claim 8
Dependent Claim
90 words
The load-dependent braking device as defined in claim 2, wherein said pressure pin means comprises three pressure pins angularly offset with respect to one another through an angle of about 120* at the carrier disk, said rod arrangement further including a respective roller for actuating each pressure pin for pressing the same against an associated one of three identical setting cams defining said setting cam means, said setting cams being displaceably arranged in offset relationship with respect to one another through an angle of about 120* at said flywheel disk.
Claim 9
Dependent Claim
87 words
The load-dependent braking device as defined in claim 2, wherein the flywheel disk possesses a projection, said setting cam means incorporating three identical setting cams arranged in angularly offset relationship with respect to one another through an angle of about 120* at said projection of the flywheel disk, said three identical setting cams forming an essentially equilateral Triangle, the sides of which are constituted by circular arcs having a radius greater than the smallest spacing between each setting cam and the lengthwise axis of the drive shaft.
Claim 10
Dependent Claim
52 words
The load-dependent braking device as defined in claim 1, wherein said setting cam means arranged at the flywheel disk is constructed of two parts having inter-engaging fork tines, and means for securing said two parts of said setting cam means at said flywheel disk so as to be mutually displaceable within slots.
Claim 11
Dependent Claim
34 words
The load-dependent braking device as defined in claim 5, further including abutment means for limiting the actuating path of said pressure pin means and preventing running-out of the rollers beyond the setting cam means.
Claim 12
Dependent Claim
41 words
The load-dependent braking device as defined in claim 2, wherein there is provided a free spring displacement path for actuation of the pressure pin means and only upon overcoming of said free spring displacement path can said pressure disk be actuated.
Claim 13
Dependent Claim
43 words
The load-dependent braking device as defined in claim 1, wherein said primary brake and said secondary brake are disk brakes having a common brake disk forming the rotatable brake part for the primary brake and the fixed brake part for the secondary brake.
References Cited (Backward Citations)
US1720766A
Cited
US2033835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |