What are the commercially available mechanisms/devices that would allow
creation of very high levels of hydraulic pressure by human movement?
Bicycle type of mechanism is preferred.

I'm already familiar with the Enerpac product line. Anything goes to
higher levels?

From:	carl mciver
Subject:	Re: highest psi creatable by hand-crank mechanism?
Date:	Sat, 22 Jan 2005 19:59:59 GMT

wrote in message
news:1106411315.820558.138060@c13g2000cwb.googlegroups.com...
| What are the commercially available mechanisms/devices that would allow
| creation of very high levels of hydraulic pressure by human movement?
| Bicycle type of mechanism is preferred.
|
| I'm already familiar with the Enerpac product line. Anything goes to
| higher levels?

Since pressure and flow are inversely proportional with the same amount
of work applied, you can get several thousand psi but the flow will be
extremely small, or lots of flow with minimal pressure.

There are hydraulic booster pumps that allow existing hydraulic systems
to pump even higher pressures in separate systems, like an air operated
hydraulic pump. Of course flow still continues to decrease as pressure
increases.

From:	Jonathan Barnes
Subject:	Re: highest psi creatable by hand-crank mechanism?
Date:	Sat, 22 Jan 2005 21:50:24 +0000 (UTC)

wrote in message
news:1106411315.820558.138060@c13g2000cwb.googlegroups.com...
> What are the commercially available mechanisms/devices that would allow
> creation of very high levels of hydraulic pressure by human movement?
> Bicycle type of mechanism is preferred.
>
> I'm already familiar with the Enerpac product line. Anything goes to
> higher levels?
>
I'm not familiar with Enerpac, what pressure do they go to ?

Two stage hydraulic pumps are fairly common, most are set to change over
from the low pressure stage at about 150 PSI, and have their relief valve
set for a maximum of around 3000 PSI from the high pressure second stage...

What pressure do you want ?

--
Jonathan

Barnes's theorem; for every foolproof device
there is a fool greater than the proof.

To reply remove AT

From:	N:dlzc D:aol T:com $dlzc$
Subject:	Re: highest psi creatable by hand-crank mechanism?
Date:	Sat, 22 Jan 2005 16:03:47 -0700

Dear Jonathan Barnes:

"Jonathan Barnes" wrote in message
news:csuhr0$ket$1@hercules.btinternet.com...
>
> wrote in message
> news:1106411315.820558.138060@c13g2000cwb.googlegroups.com...
>> What are the commercially available mechanisms/devices that would allow
>> creation of very high levels of hydraulic pressure by human movement?
>> Bicycle type of mechanism is preferred.
>>
>> I'm already familiar with the Enerpac product line. Anything goes to
>> higher levels?
>>
> I'm not familiar with Enerpac, what pressure do they go to ?

They have products that go to 10,000 psi.

David A. Smith

From:	Ned Simmons
Subject:	Re: highest psi creatable by hand-crank mechanism?
Date:	Sat, 22 Jan 2005 13:57:36 -0500

In article <1106411315.820558.138060@c13g2000cwb.googlegroups.com>,
alanh_27@yahoo.com says...
> What are the commercially available mechanisms/devices that would allow
> creation of very high levels of hydraulic pressure by human movement?
> Bicycle type of mechanism is preferred.

Dead weight testers go over 100,000 psi, but are one-shot devices so no
good if you need much volume or a continuous flow.

>
> I'm already familiar with the Enerpac product line. Anything goes to
> higher levels?
>

Enerpac goes as high as 40,000 psi, how much do you want?

Ned Simmons

From:	tomcas
Subject:	Re: highest psi creatable by hand-crank mechanism?
Date:	Sun, 23 Jan 2005 00:10:55 -0500

From:	Uncle Al
Subject:	Re: highest psi creatable by hand-crank mechanism?
Date:	Sat, 22 Jan 2005 09:13:43 -0800

alanh_27@yahoo.com wrote:
>
> What are the commercially available mechanisms/devices that would allow
> creation of very high levels of hydraulic pressure by human movement?
> Bicycle type of mechanism is preferred.
>
> I'm already familiar with the Enerpac product line. Anything goes to
> higher levels?

Thumbscrew and diamond anvil press. Needle point piston levered into
rigid filled reservoir. Gonna hafta be real rigid and the fluid
incompressible.

--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz.pdf

From:	tj Frazir
Subject:	Re: highest psi creatable by hand-crank mechanism?
Date:	Sat, 22 Jan 2005 12:56:05 -0500

They weigh each rider befor and after the race.
Dont worry about calories ,, he is burning
0.5 pound of fuel in 4 hours .
thats 2 hp 4 hours on 1/2 pound of fuel.
1/8 pound fuel 2 hp per hour.
1/16 pound fuel 1 hp per hour.
a one hp gas engine uses 4 pounds per hour.
A car uses 1/2 pound per 1 hp hour.
the LPE beats them all.

From:	George
Subject:	Re: highest psi creatable by hand-crank mechanism?
Date:	Sat, 22 Jan 2005 23:09:21 -0600

Uncle Al wrote:

>alanh_27@yahoo.com wrote:
>>
>> What are the commercially available mechanisms/devices that would allow
>> creation of very high levels of hydraulic pressure by human movement?
>> Bicycle type of mechanism is preferred.
>>
>> I'm already familiar with the Enerpac product line. Anything goes to
>> higher levels?
>
>Thumbscrew and diamond anvil press. Needle point piston levered into
>rigid filled reservoir. Gonna hafta be real rigid and the fluid
>incompressible.

I believe that this simple apparatus is among the highest pressure
producing devices that man has made - if you exclude explosives.

Used to investigate the phase changes of materials at extremely high
pressures.

Do you know what pressure they can attain? 1,000,000 psi comes to
mind.

From:	tj Frazir
Subject:	Re: highest psi creatable by hand-crank mechanism?
Date:	Sat, 22 Jan 2005 12:31:52 -0500

Sliding vane rotor works the best.
foot power 100 pounds at 12 inches at 100 rpm. 2 hp befor I do the
math .
whats 100 foot pounds at 100 rpm ?
about 2 hp.
now you pick the best method off te shelf that will run on 1400
watts ,,a 1400 watt hydrolic unit.
8000 psi max.

From:	Jeff Wisnia
Subject:	Re: highest psi creatable by hand-crank mechanism?
Date:	Sat, 22 Jan 2005 11:40:54 -0500

alanh_27@yahoo.com wrote:
> What are the commercially available mechanisms/devices that would allow
> creation of very high levels of hydraulic pressure by human movement?
> Bicycle type of mechanism is preferred.
>
> I'm already familiar with the Enerpac product line. Anything goes to
> higher levels?
>

You didn't describe your application in great detail, but if you don't
need a lot of flow, consider the possibility of using a hand operated
grease gun.

Jeff

--
Jeffry Wisnia

(W1BSV + Brass Rat '57 EE)

"As long as there are final exams, there will be prayer in public
schools"

From:	Brian Whatcott
Subject:	Re: highest psi creatable by hand-crank mechanism?
Date:	Sat, 22 Jan 2005 19:22:23 GMT

On Sat, 22 Jan 2005 11:40:54 -0500, Jeff Wisnia
wrote:

>alanh_27@yahoo.com wrote:
>> What are the commercially available mechanisms/devices that would allow
>> creation of very high levels of hydraulic pressure by human movement?
>> Bicycle type of mechanism is preferred.
>>
>> I'm already familiar with the Enerpac product line. Anything goes to
>> higher levels?
>>
>
>
>You didn't describe your application in great detail, but if you don't
>need a lot of flow, consider the possibility of using a hand operated
>grease gun.
>
>Jeff

[I trimmed out a hobby group]

To get a feel for the pressures available, consider a grease gun with
a ten inch arm, where the hydraulic piston is linked at 1 inch from
the pivot: a 10:1 advantage.
If the pin is 1/4 inch diameter, and the pressure on the lever arm is
40 lbs tops, then the force on the piston is 400 lb., and the pressure
is 400/ (piX1/8 X 1/8) psi = 8150 psi.

Brian Whatcott Altus OK