Jump to content

Clutch Vs Clutchless Piston


KingRoach

Recommended Posts

Hi all.

 

I have a question: I think I understand what a clutchless piston filler is. The piston is operated by a threaded helix. You turn it to push the piston up or down, or keep turning the same helix beyond its stop point to disassemble the piston/pen.

 

What is a clutch on a piston filler? I haven't been able to find information.

 

I am asking also because I have a piston filler that I intend to disassemble and it does something that makes me think it might be a clutch type, but I would like to know what that is first.

 

Best regards

Link to comment
Share on other sites

  • Replies 1
  • Created
  • Last Reply

Top Posters In This Topic

  • hari317

    1

  • KingRoach

    1

Popular Days

Top Posters In This Topic

There is no clutch in the conventional sense. This terminology is arbitrary. I have no idea where it originated.

 

Any piston filler can be understood as a nut bolt arrangement. You arrest rotation of one and rotate the other, you get rotary to linear motion.

 

Conventionally, the piston shaft runs straight up and down the barrel. Its rotation is prevented by an anti rotation mechanism. There exist several ways to implement this rotation prevention.

 

In very cheap piston fillers, the mechanical anti rotation feature is simply omitted. Now how does rotary to linear motion transformation take place then? The friction between the barrel walls and piston seal provides this function. Thus such piston fillers cannot operate with very low friction. So they never are as smooth or refined as the Pelikan mechanism for example. There are some advantages like inherent overload protection, simple assembly disassembly, very cheap to manufacture.

 

You risk cracking the knob snout if you use the method of unscrewing beyond the stop method to take apart these fillers.

 

HTH.

In case you wish to write to me, pls use ONLY email by clicking here. I do not check PMs. Thank you.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Most Contributions

    1. amberleadavis
      amberleadavis
      43844
    2. PAKMAN
      PAKMAN
      33501
    3. Ghost Plane
      Ghost Plane
      28220
    4. inkstainedruth
      inkstainedruth
      26627
    5. jar
      jar
      26101
  • Upcoming Events

  • Blog Comments

    • Shanghai Knife Dude
      I have the Sailor Naginata and some fancy blade nibs coming after 2022 by a number of new workshop from China.  With all my respect, IMHO, they are all (bleep) in doing chinese characters.  Go use a bush, or at least a bush pen. 
    • A Smug Dill
      It is the reason why I'm so keen on the idea of a personal library — of pens, nibs, inks, paper products, etc. — and spent so much money, as well as time and effort, to “build” it for myself (because I can't simply remember everything, especially as I'm getting older fast) and my wife, so that we can “know”; and, instead of just disposing of what displeased us, or even just not good enough to be “given the time of day” against competition from >500 other pens and >500 other inks for our at
    • adamselene
      Agreed.  And I think it’s good to be aware of this early on and think about at the point of buying rather than rationalizing a purchase..
    • A Smug Dill
      Alas, one cannot know “good” without some idea of “bad” against which to contrast; and, as one of my former bosses (back when I was in my twenties) used to say, “on the scale of good to bad…”, it's a spectrum, not a dichotomy. Whereas subjectively acceptable (or tolerable) and unacceptable may well be a dichotomy to someone, and finding whether the threshold or cusp between them lies takes experiencing many degrees of less-than-ideal, especially if the decision is somehow influenced by factors o
    • adamselene
      I got my first real fountain pen on my 60th birthday and many hundreds of pens later I’ve often thought of what I should’ve known in the beginning. I have many pens, the majority of which have some objectionable feature. If they are too delicate, or can’t be posted, or they are too precious to face losing , still they are users, but only in very limited environments..  I have a big disliking for pens that have the cap jump into the air and fly off. I object to Pens that dry out, or leave blobs o
  • Chatbox

    You don't have permission to chat.
    Load More
  • Files






×
×
  • Create New...