Rastwulz / Rastnut

English translation: locking bead

03:19 Dec 29, 2011
German to English translations [PRO]
Tech/Engineering - Mechanics / Mech Engineering / practice ammunition in cartridge form
German term or phrase: Rastwulz / Rastnut
I assume that Rastnuten refers to "grooves" but what is a Rastwulz? Googling and researching does not yield anything. I suspect that it could/should read "Rastwulst" but I admit being puzzled.
The full sentence reads as follows:
"Steigt der Druck in der Kammer weiter an, so wird bei einem bestimmten Druck der Rastwulz der Patronenhülse an der Rastnut des Geschosses abgeschert, sodass das Geschoss ausgetrieben wird."
I would not mind getting help with the entire sentence but shall certainly appreciate explanation/translation of
"Rastwulz" from a Fachmann i.e. 'person skilled in the art'.
Thanks in advance and have a happy New Year!
swisstell
Italy
Local time: 18:49
English translation:locking bead
Explanation:
This term is used both in US patents and in English translations of German patents.

References:

1. European patent application “Drückeranordnung” (language of filing: German)

„...eine vorstehende umlaufende oder unterbrochene Rastwulst 5, die in eine umlaufende Nut 6 der Führungsbuchse 2 quasi einrastet.“

“The latter can have a locking bead (5) on the inside and engaging in a groove (6) ...”
http://ip.com/patapp/EP0628680A1

2. US patent 4026563 “Oil seal with locking bead and O. D. sealing rib”
“... the locking bead 42 is designed to snap into the locking groove...”
http://www.patentstorm.us/patents/4026563/description.html


Selected response from:

Translation-Pro
Germany
Local time: 18:49
Grading comment
both contributors many thanks and Happy New Year!
4 KudoZ points were awarded for this answer



Summary of answers provided
3crimp / cannelure
smasud (X)
2locking bead
Translation-Pro


Discussion entries: 2





  

Answers


7 hrs   confidence: Answerer confidence 3/5Answerer confidence 3/5
crimp / cannelure


Explanation:
It is "Rastwulst" instead of "Rastwulz". See the 1st web reference below.

"Rastwulst" probably = "crimp", and "Rastnut" probably = "cannelure". See the 2nd web reference below, for example.



    Reference: http://www.patent-de.com/20060518/DE102004017464B4.html
    Reference: http://www.dave-cushman.net/shot/overview.html
smasud (X)
Local time: 18:49
Works in field
Native speaker of: English
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2 days 17 hrs   confidence: Answerer confidence 2/5Answerer confidence 2/5
locking bead


Explanation:
This term is used both in US patents and in English translations of German patents.

References:

1. European patent application “Drückeranordnung” (language of filing: German)

„...eine vorstehende umlaufende oder unterbrochene Rastwulst 5, die in eine umlaufende Nut 6 der Führungsbuchse 2 quasi einrastet.“

“The latter can have a locking bead (5) on the inside and engaging in a groove (6) ...”
http://ip.com/patapp/EP0628680A1

2. US patent 4026563 “Oil seal with locking bead and O. D. sealing rib”
“... the locking bead 42 is designed to snap into the locking groove...”
http://www.patentstorm.us/patents/4026563/description.html





    Reference: http://ip.com/patapp/EP0628680A1
    Reference: http://www.patentstorm.us/patents/4026563/description.html
Translation-Pro
Germany
Local time: 18:49
Works in field
Native speaker of: German
PRO pts in category: 12
Grading comment
both contributors many thanks and Happy New Year!
Login to enter a peer comment (or grade)



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