Steven Donald Acenbrak
Engineers in Roswell, GA
License number
Georgia PE028120
Issued Date
Sep 25, 2002
Renew Date
Feb 11, 2016
Expiration Date
Dec 31, 2018
Category
Engineers & Land Surveyors
Type
Professional Engineer
Address
Address
Roswell, GA
Professional information
Ergonomic Shifter For A Bicycle
US Patent:
2007026, Nov 15, 2007
Filed:
Oct 31, 2005
Appl. No.:
11/666711
Inventors:
Steven Acenbrak - Roswell GA, US
International Classification:
F16C 1/10
US Classification:
074502200
Abstract:
A shifter for a bicycle having a derailleur, comprising a housing adapted to mount to a handlebar of the bicycle. The shifter further comprising a gear connected with a cable in communication with the derailleur, which is rotatably mounted in the cavity and has first and second sets of teeth; a first pawl element biased by a first biasing member into engagement with the first set of teeth; a second pawl element biased by a second biasing member into engagement with the second set of teeth. The shifter further comprising first and second shifting levers that are movable along a parallel axis of movement with a person's thumb during a shifting operation, such that the first shifting lever moves in a natural direction of movement of the thumb to wind the gear against the resistance of a gear biasing member and advance the gear of the derailleur, and such that the second shifting lever moves along a rotational axis relative to the first lever to release the gear and lower the gear of the derailleur
Ergonomic Bike Shifter
US Patent:
D579833, Nov 4, 2008
Filed:
Apr 30, 2007
Appl. No.:
29/279423
Inventors:
Steven D. Acenbrak - Roswell GA, US
International Classification:
1216
US Classification:
D12179