A sound-damping unit for a sprocket has a mounting foot for connection to a sprocket and an elastic body placed on the mounting foot that is suitable for cushioning a chain running onto the sprocket. The elastic body is provided with a protective cap or protective layer. A sprocket according to the invention includes a circular …

Legal parties

Inventors (applicants): Burkhard Grobbel
Assignees (initial): Ketten-Wulf Betriebs-GmbH (Eslohe-Kueckelheim, DE)
Agents: Ralph E. Locher (attorney), Werner H. Stemer (attorney), Laurence A. Greenberg (attorney)

The application was examined by Mark K Buse, William E Dondero (USPTO dept. 3654)


  • 1. A sprocket, comprising: …
  • 2. The sprocket according to claim 1 , wherein said sound-damping units are disposed on both …
  • 3. The sprocket according to claim 1 , wherein one, two, three, or more sound-damping …

International priority data

DE: 20 2007 015 303 U / Nov. 3, 2007 (national)

Cited documents


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Brief Description of the Several Views of the Drawing

Further features and advantages of the present invention will be apparent with reference to the following description of preferred exemplary embodiments with reference to the accompanying drawings, wherein: FIG. 1 is a front …


Field of the Invention

The present invention relates to a sound-damping unit for a sprocket having a mounting base for connection to a sprocket and an elastic body mounted on the mounting base …

Description of the Invention

Reference is first made to FIG. 1 . A sound-damping unit 1 according to the present invention essentially comprises a mounting base 2, an elastic body 3 and a protective …

More details about Sound-Damping Unit for a Sprocket, and Sprocket

Miscellaneous patent data

Includes the following drawings: Sectional view of a sound-damping, Sound-Damping Unit for a Sprocket, Front view of a sound-damping, 10 figures depict the invention details, the patent extension term is 112 days, the patent particularly claims a sprocket, comprising…, located in Eslohe-Kueckelheim (DE), the assignee organization is Ketten-Wulf Betriebs-GmbH, the claim number 1 is selected as exemplary, the invention description is illustrated by 2 drawings, the invention is named Sound-Damping Unit for a Sprocket, and Sprocket, numbered 12/741,100 (application), similar classification categories are Control outputs to change-speed- or reversing-gearings for conveying rotary motion, in which the member B is a disc with a flat or approximately-flat friction surface, Connector connects sequential links each having discrete members forming laterally spaced sides, particular structure facilitating disassembly of adjacent links, Gearings comprising primarily only links or levers, with or without slides, Pulley With Expansible Rim Means or Pulleys With Alternately Useable Nestable Rims, Including intermeshing gears in one drive train, Pulley With Belt-Receiving Groove Formed by Drive Faces on Relatively Axially Movable Coaxial Confronting Members, Gearboxes for gearing with endless flexible members, Gearings providing a discontinuous or stepped range of gear ratios, the application publication date is Oct. 15, 2008, the application was examined by William E Dondero, the assistant examiner Mark K Buse (3654 USPTO department), categorized under Resilient Connection Between Pulley or Guide-Roll Rim and Mount as a primary classification, the published inventor's name is Burkhard Grobbel, developed by Burkhard Grobbel, the protection scope is defined by 18 claims, the patent was granted on Jul. 1, 2014, the grant publication number is 08764593, the published applicant's name is Burkhard Grobbel, the agent's name is Werner H. Stemer, assigned to a foreign company or corporation.

Invention classification information

The invention is classified under in respect of physical properties, e.g. hardness, Chain wheels, Vibration-dampers, Shock-absorbers, Resilient Connection Between Pulley or Guide-Roll Rim and Mount, General details of gearing, Layered products essentially comprising synthetic resin. The designated search classifications include Resilient Connection Between Pulley or Guide-Roll Rim and Mount, Having nonmetallic component.

Patent details
Publication number 08764593
Publication date Jul. 1, 2014
Kind code B2
Application number 12/741,100
Application date Oct. 15, 2008
Application type U
Application series code 12
Int. pub. country WO
Int. pub. number WO2009/056219
Int. publication May. 7, 2009
Int. filing country WO
Int. filing PCT/EP2008/008689
Filed internationally Oct. 15, 2008
National stage date May. 3, 2010
Extension term 112
National classification 474/94
Total number of claims 18
Exemplary claims 1
Number of drawings 2
Number of figures 10
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