[DeTomaso] CLUTCH BASICS

[Dan Mixon]

Bill Hays of Hays Clutches which was bought by Mr. Gasket which was bought
by Prestolite Performance. You can still buy Hays clutches.
http://www.haysclutches.com/  

-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of Ken Green
Sent: Saturday, November 29, 2008 10:46 PM
To: detomaso at realbig.com; JDeRyke at aol.com
Subject: Re: [DeTomaso]  CLUTCH BASICS

For anyone interested, I think the patent covering this (I didn't look at
the claims in detail) is US Patent No. 4425991 issued to Bill Hays, which
has expired.  A similar concept is in US 5575367 owned by Mr. Gasket.  You
can download free PDF copies if you are interested from:
 
http://www.patentfetcher.com/Patent-Fetcher-Form.php
 
Ken


--- On Sat, 11/29/08, JDeRyke at aol.com <JDeRyke at aol.com> wrote:

From: JDeRyke at aol.com <JDeRyke at aol.com>
Subject: Re: [DeTomaso]  CLUTCH BASICS / Dick Ruzzin
To: kenn_green at yahoo.com, detomaso at realbig.com
Date: Saturday, November 29, 2008, 5:00 PM

In a message dated 11/29/08 12:24:51 PM, kenn_green at yahoo.com writes:

> Several clutch manufactures appear to offer dual friction disks, but
I'm 
> not sure if they are the same as the Centerforce.  What I thought was
really 
> different is the weights shown here....
> 
Not only do the sliding weights increase holding power, but they may have 
cured another problem that wrecked the reputation of the diaphragm clutch as
a 
'performance part'. Back in the mid '60s when GM used them on
'Vettes and Z-28s, 
they had a horrible reputation as not being shift-able above about 5000
rpms. 
If you revved up a straight-finger, weight-less diaphragm clutch and stepped

on the pedal to do a shift, the clutch over-centered and the clutch pedal 
stayed on the floor until the revs dropped significantly! Needless to say,
no
one 
used GM diaphragm clutches in drag racing or for much of anything else 
performance-wise after that was discovered. Centerforce did   good things
with
their 
modifications IMHO- J DeRyke



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