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Author Topic: Vector from 1907  (Read 2452 times)

DugB

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Vector from 1907
« on: July 30, 2009, 06:10:25 pm »
Check out this old bicycle patent:

http://bicyclepatents.com/early-front-bike-suspension/119/

Looks like out forks, and really like a lot of old motorcycle suspensions, like the one on my old '41 Zundapp (which sadly and happily isn't mine anymore):

http://www.zundappfool.com/images/visitors%20bikes%20I-X/visitors_bikes/IMGP3537%20-%20resized_a.jpg
5500c
956 LE (thanks, Terry!)
955 (small, for my wife)
Cannondale SuperVs
'62 Puch 250 SGS
'67 BMW R60/2
'52 BMW R67/2
a very understanding wife

shovelon

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Re: Vector from 1907
« Reply #1 on: July 30, 2009, 07:18:27 pm »
Well what a find. Looks like those are very workable linkage forks. :)
OzM,(Ozzie)
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whisperdancer

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Re: Vector from 1907
« Reply #2 on: August 02, 2009, 06:52:47 am »
Looks like the Cannondale had some inspiration here:

http://bicyclepatents.com/the-first-front-suspension-bicycle/134/
Proflex '97 Animal with Carbon Swingarm & Crosslink Carbon fork
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DugB

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Re: Vector from 1907
« Reply #3 on: August 07, 2009, 01:32:45 pm »
Just thinking...that old 1907 design wouldn't have one thing that our bikes do: the J path. The Girvin behaves like that because the top linkage arms are actually shorter than the bottoms, right? I think that 1907 design is actually more similar to the Fournales than our forks.

Just wondering...

- Doug
5500c
956 LE (thanks, Terry!)
955 (small, for my wife)
Cannondale SuperVs
'62 Puch 250 SGS
'67 BMW R60/2
'52 BMW R67/2
a very understanding wife

shovelon

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Re: Vector from 1907
« Reply #4 on: August 07, 2009, 03:05:56 pm »
I think you are right. But I think the girvins take a direct hit better because the fork leg is allowed to rotate the upper link forward in a see-saw fashion. Sooo, when I brake the front wheel tucks under as well as compresses??????????

Terry
OzM,(Ozzie)
K24000,(Red)
957small,(Shorty)
957Large,(Monty)
956 LE,(Peirce)    <Sold>
Offroad "Proflex" (Serrota),
Serotta CST  titanium softail
McMahon FS