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Retracting & rotating main U/C



 
 
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  #1  
Old January 27th 20, 08:53 AM posted to rec.aviation.soaring
[email protected]
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Default Retracting & rotating main U/C

Hi, is anyone able to point me in the direction of pictures or patent number that describe the retracting & rotating main wheel of the SZD Cobra or the Grob Twin II A? Regards Mark
  #3  
Old January 28th 20, 06:10 AM posted to rec.aviation.soaring
Tango Whisky
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Default Retracting & rotating main U/C

Patents run for 20 years, so anything connected to Grob gliders will have expired long ago.
  #4  
Old January 28th 20, 06:20 AM posted to rec.aviation.soaring
Dave Nadler
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Default Retracting & rotating main U/C

On Tuesday, January 28, 2020 at 12:10:26 AM UTC-5, Tango Whisky wrote:
...anything connected to Grob gliders will have expired long ago.


Except mostly for those G103s ;-)
Think they'll last as long as the 2-33s?


  #5  
Old January 28th 20, 06:20 AM posted to rec.aviation.soaring
AS
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Default Retracting & rotating main U/C

On Tuesday, January 28, 2020 at 12:10:26 AM UTC-5, Tango Whisky wrote:
Patents run for 20 years, so anything connected to Grob gliders will have expired long ago.


...... unless they get renewed.

Uli
'AS'
  #6  
Old January 28th 20, 02:58 PM posted to rec.aviation.soaring
Tango Whisky
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Default Retracting & rotating main U/C

Le mardi 28 janvier 2020 06:20:29 UTC+1, AS a écritÂ*:
On Tuesday, January 28, 2020 at 12:10:26 AM UTC-5, Tango Whisky wrote:
Patents run for 20 years, so anything connected to Grob gliders will have expired long ago.


..... unless they get renewed.

Uli
'AS'


You can't renew a patent after 20 years. It becomes public domain, and that's it.
  #7  
Old January 28th 20, 07:15 PM posted to rec.aviation.soaring
AS
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Default Retracting & rotating main U/C

On Tuesday, January 28, 2020 at 8:58:57 AM UTC-5, Tango Whisky wrote:
Le mardi 28 janvier 2020 06:20:29 UTC+1, AS a écritÂ*:
On Tuesday, January 28, 2020 at 12:10:26 AM UTC-5, Tango Whisky wrote:
Patents run for 20 years, so anything connected to Grob gliders will have expired long ago.


..... unless they get renewed.

Uli
'AS'


You can't renew a patent after 20 years. It becomes public domain, and that's it.


TW - that is generally correct and after 20 years, there is rarely any interest in continuing any protection. But sometimes, there is and a good patent attorney will figure out how to revitalize that protection by adding new aspects to the process or invention. It becomes basically a new patent that tries to cover as much of the old stuff which wasn't disclosed before plus the new stuff. That's why good patent attorneys make the big bucks they typically do. ;-)

Uli
'AS'
  #8  
Old January 28th 20, 08:22 PM posted to rec.aviation.soaring
[email protected]
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Default Retracting & rotating main U/C

On Monday, January 27, 2020 at 2:53:39 AM UTC-5, wrote:
Hi, is anyone able to point me in the direction of pictures or patent number that describe the retracting & rotating main wheel of the SZD Cobra or the Grob Twin II A? Regards Mark


I use Google Patents for a lot of searches.

Try this link for the Grob patent; https://patents.google.com/patent/DE...ng+Grob&page=2

Good luck!
  #9  
Old January 30th 20, 04:34 AM posted to rec.aviation.soaring
Garrett McEwen
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Default Retracting & rotating main U/C

That mechanism showed up for the Twin III, and is for the nosewheel steering. The OP is asking about that thing in the Twin Astir that makes the instructor's hips sore.
  #10  
Old January 30th 20, 06:11 AM posted to rec.aviation.soaring
Haven
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Default Retracting & rotating main U/C

On Wednesday, January 29, 2020 at 7:34:11 PM UTC-8, Garrett McEwen wrote:
That mechanism showed up for the Twin III, and is for the nosewheel steering. The OP is asking about that thing in the Twin Astir that makes the instructor's hips sore.


Grob devised a novel retraction system for the Twin Astir. The single wheel was designed to rotate 90° sideways before retracting "flat" under the rear seat, resulting in a rather unusual seating position. This was only incorporated in early examples, later on, the wheel was fixed.
 




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