RESSORT A EPAISSEUR AMELIOREE

THINCKNESS INCREASE SPRING

Abrégé anglais

Generally the area of the spring's cross section increases from one end to the
other. (Or
decrease if you
start to look from the other end.) It's geting thicker. Therefore the spring
has a variable
rate(lb/in), which increases from the weaker end to the stronger end, and is
linear to the
area of the cross section. And it will be used under compression only.

Revendications

Claim 1: The cross section is not traditionally a consistant cycle from
spring's
one end to the other, but a cycle with both top and bottom
arches cut off for the spring rings to stack better. Hence less sliding
between
two adjacent rings, less curvy or bent for the whole spring's
center line. And also the cycle could be made oval instead, which doesn't
bring
much change to the whole spring.
Claim 2: And also the area of the cross section increases through the whole
spring, thus bring us the variable spring rate to our spring.
Claim 3:The whole spring coil's diameter doesn't change.

Description

CA 02750672 2011-08-25
See Picture 1., look at the cross section(with tilted strips) of spring wire,
Claim 1 :The cross section is not traditionally a consistant cycle from
spring's
one end to the other, but a cycle with both top and bottom
arches cut off for the spring rings to stack better. Hence less sliding
between
two adjacent rings, less curvy or bent for the whole spring's
center line. And also the cycle could be made oval instead, which doesn't
bring
much change to the whole spring.
Claim 2: And also the area of the cross section increases through the whole
spring, thus bring us the variable spring rate to our spring.
Claim 3: The whole spring coil's diameter doesn't change.
See picture 2a, when force applies to press the spring, the length change
between two adjacent rings happens through the whole spring, but at the
weaker end the rings has lower spring rate(lb/in) the length change is more
obvious. The rings at the stronger end get closer much slower and can endure
much stronger force. At one point(see picture 2b), the rings at the weaker end
start to "stack together" and become idle; and this process repeat from the
weaker end toward the stronger end, untill the spring and the force reach
balance.
The weaker end provides spring users with more personable touch. The spring
will easily fit in environment. For the same spring's applied model, the
spring
coil's weak end stacks more or less for different end users according to the
different usage. It will help designer avoid the metal fatigue of other parts,
reduce the wear and tear of other parts' joints, while the stronger end gives
the
designers a peace in their mind since this end can stand strong force(without
the help of the air spring).
The applicable working range is much wider now. Spring coil could be made a
lot wider, lighter, and shorter. These features are all good towards better
design.
How fast the spring wire's diameter/gauge/thickness increase is very flexible
to
suit in every spring's different applied condition. Linear or not,
staggering or not, are all fine, but the spring coil's diameter keeps the same
to
make sure it's weak end stack well. (For staggering design, applying
force to the straighten spring wire at same angle as the two spring rings, and
test if it breaks under certain force. If break happens, designer could make
thickness shift more gradually.
Computer will be very helpful during spring's design and making. Since the
formular for the force and stop point is hard to get, a experimental table
could
be prepared to estimate.

Dessin représentatif