Ein Vorschlag.

http://www.google.it/search?hl=it&q=" the invention provides...

According to the invention, it is contemplated to replace..

Susaphon, your answer isn't bad, but you left out the 'deshalb', which does render your sentence incorrect.

Inventively is an acceptable alternative to 'according to the invention', which can get clumsy.

...replacing etc.

would be my preferred translation.

See:


The invention proposes a method for producing a printed product, ..... The present invention therefore affords an extremely simple interface which allows ...
www.faqs.org/patents/app/20100031840 - Cached


The invention therefore proposes, in a process of the type indicated in the introduction, that a set of Y bits respectively having Y determined positions in ...
www.eipa-patents.org/.../Find-patent-Communications-system-... - Cached

A more elegant version (with 107000 ghits)

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Note added at 1 hr (2010-05-25 12:39:36 GMT)
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sorry, forgot the deshalb

the invention therefore envisages the replacement of ....

BTW "provided" is used when equipment or physical means are indeed provided, envisages for a principle or idea - which appears to be the case here

The question relates to a construction continuing with an infinitive:
Erfindungsgemäß ist deshalb vorgesehen, den [Stoff X] für die Herstellung der Teile durch den [Stoff Y] zu ersetzen.
The selected answer "According to the present invention there is therefore provided" doesn't work with a following infinitive.
In fact, there is not a single Google hit for "According to the present invention there is therefore provided to," not even among the Korean and Japanese patents that Marga Shaw cites as support for her answer.
The native English patent US3671653, for example, has:
"The present invention provides for replacing..."