New bicycle idea

"FredBillie" wrote in message
...
From: (JRKRideau)
Date: Fri, Oct 1, 2004 10:33 AM
Message-id:

"Bob Marley" wrote in message
...
Your advice would be much appreciated:

I have an idea for a bicycle transmission. Which person or company
would be the best to approach for development of the concept?

Thanks in advance

You might want to check a couple of bicycling history books and see if
it has already been done. A lot of very clever inventors spent a lot
of time thinking about bicycles in the 1890s and the early 20th C.

New materials, etc, may make your idea pactical now but a quick check
might save you some time and effort. James McGurn's book "On your
bike" might be a good place to look.

John Kane
Perth
BRBR
I note that one site had an infinite speed Hub transmission for sale
(well,
infinite from the lowest to the highest speed). It was just under $1000.

Plus there's that annoying infomercial out there for the bike with an
automatic transmission...I can't remember what it's called - Land Rider or
something??? - anyway, if you google it, there aren't too many people
pleased with the way it really works once you get outside the group of
"paid" endorsers shown on TV.

If you really got a good idea, just go to a machine shop, they are
fully able to fabricate all the parts for your average bicycle. A
prototype would be expensive, but after the initial tooling, the price
drops alot. Don't sell your idea to someone else, they will convince
you they are doing you a big favor and make you pay them, then make a
fortune off your idea.

Pay the metal fabricator to make your parts for you, and use a mix
of your special, unique parts with available, mass produced parts,
that would be the way to go.


I know what you're saying about how just about everything to be
thought of has already been thought of, but it just seems like they
could make a bike with greater mechanical advantage that what they go,
you know. The power of your pedal, which is a lever, and the diameter
of the sprocket determine your mechanical advantage, but if you
increases the length of the pedal lever, you increase the leverage.
It just seems like , with all these new super strong materials, there
would be no limit to the mechanical advantage you could employ, using
leverage in longer pedals, that don't make whole circles, but rather
winch style propulsion, pedals a foot or two long, quadrupling
mechanical advantage, or larger diameter sprockets, up higher between
the legs so they don't hit the ground. Seems to me so many simple,
basic ways to increase mechanical advantage, but I think people don't
do it because of aesthetics and simplicity.

If you could quadruple the mechanical advantage though, by increased
leverage in the pedal and sprocket diameter, you're talking about the
ability to bike on a touring bike, an average of 50-60 mph, you're
talking about an effective human powered replacement for the
automobile, that or a 30 mph average and the ability to haul materials
through human powered machinery.

Rush Cocoo writes:

I know what you're saying about how just about everything to be
thought of has already been thought of, but it just seems like they
could make a bike with greater mechanical advantage that what they
go, you know. The power of your pedal, which is a lever, and the
diameter of the sprocket determine your mechanical advantage, but if
you increases the length of the pedal lever, you increase the
leverage.

The way you use the terms makes clear you do not understand the real
limitations of bicycle performance. You mix mechanical advantage and
power as though they were the same. The gears of current bicycles
offer a range of mechanical advantage greater than what a human can
use effectively. What the rider does not have is more POWER and it is
power that limits performance.

If you could quadruple the mechanical advantage though, by increased
leverage in the pedal and sprocket diameter, you're talking about
the ability to bike on a touring bike, an average of 50-60 mph,
you're talking about an effective human powered replacement for the
automobile, that or a 30 mph average and the ability to haul
materials through human powered machinery.

We are able to quadruple the ME of the drive mechanism with current
gearing. Many bicycles have 1:1 to 4:1 ratios in 36t to 36t up to 52t
to 11t or 4.7:1 ratio. What more do you wish to do. These gears
exceed what any bicycle road racer can and does use. You'll find that
professional racers use a far smaller gear range because a greater one
would lie beyond their power.

Please study the concepts before trying to argue that bicycle gearing
is inadequate.

Jobst Brandt

no, the pedal lever, asshole, leverage increases power. the longer
the lever, the greater the power. I"m talking about increasing the
length of the pedal lever. The thought of telling an asshole like you
a great idea makes me sick however.

wrote in message ...


Jobst, which exerts more force on the load of a lever, a 4 foot
lever or a 1 foot lever? The pedal lever on most bikes is under a
foot long. If you increase the length of the lever,the power or force
increases.

Does a 6 foot crowbar exert more force than a 3 foot crowbar? The
shut the **** up. (i'm just kidding)

Of course, the axle sprocket would have to be moved. I think most
likely people must surely have had ideas like this , but were probably
mostly shelfed as the auto became the dominant means of
transportation.

increasing the length of the pedal lever to four times the length of
your current pedal lever will increase your power 4 times. Look up
'levers' on the internet before you open your silly mouth.

On 3 Oct 2004 12:32:47 -0700,
(BringYouToLife) wrote in message
:

which exerts more force on the load of a lever, a 4 foot
lever or a 1 foot lever? The pedal lever on most bikes is under a
foot long. If you increase the length of the lever,the power or force
increases.

Jobst is right: you don't understand. Lengthening the cranks
increases torque but the power input is still limited by what the
rider can put in. Power is torque x angular velocity. How fast can
you spin a 300mm crank?

Guy
--
May contain traces of irony. Contents liable to settle after posting.
http://www.chapmancentral.co.uk

88% of helmet statistics are made up, 65% of them at Washington University

The pedal lever is the part that extends from the main torque axle, to
the actual pedal. On your average bike it's about 7 inches from the
pedal to the axle. That's a 7 inch lever.

Not even making any changes to the frame of my bike, if you put the
main torque axle on the front wheel, your feet would be in the same
position, and you would have a nearly 35 inch lever, this would be 5
times more power through mechanical advantage. The motion would be
that of a ratchet wrench, pushing down, then it would slide back up,
you could pull the pedal back up stirrups or locking biking shoes.

with 5 times more power, you could use a much larger diameter gear
on the front.

This means you could go 5 times faster, or also, carry 5 times as
much stuff with the same effort. So if you weigh 200lbs, you could
then transport 1000 lbs with the same effort. 5 people peddling a
truck could transport 5,000 lb loads. Human powered flight could
become a reality as well.

In article ,
(BringYouToLife) writes in part:

with 5 times more power, you could use a much larger diameter gear
on the front.

This means you could go 5 times faster

Just out of curiosity, how do you intend to deal with
air resistance?


--
-- Nothing is safe from me.
Above address is just a spam midden.
I'm really at: tkeats [curlicue] vcn [point] bc [point] ca

the US patent office has a data base of all images and patents issues,
and yes, even all patents APPLIED for, for God's sakes, the internet
is awesome.


I did a search for all patents issued from 1790 to present for
'bicycle' and got 15,839 results.

http://patft.uspto.gov/netacgi/nph-P...FIELD2=&d=ptxt


http://patft.uspto.gov/netahtml/search-bool.html

just go to above link and type 'bicycle'

(BringYouToLife) wrote:

increasing the length of the pedal lever to four times the length of
your current pedal lever will increase your power 4 times. Look up
'levers' on the internet before you open your silly mouth.

Probably should have tried to continue this obvious troll with
something a LITTLE less obvious... you woulda hooked more that way.

Mark Hickey
Habanero Cycles
http://www.habcycles.com
Home of the $695 ti frame