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Zolfo Springs, Florida Hardee County Antique Engine, Tractor & Car Show at Pioneer Park.

Zolfo Springs, Florida

Wacky Pump at Zolfo Springs


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  #1  
Old 03-04-2004, 10:51:05 PM
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Default Wacky Pump at Zolfo Springs

Had a great day today. I saw one of these before in Wisconsin, but I didn't have a clip camera then. Click below the photo...



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  #2  
Old 03-05-2004, 01:04:25 AM
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Default Re: Wacky Pump at Zolfo Springs

Just in case you thought this was something unusual, here's another one as seen at the Plainfield, Wisconsin show. The gearing offers extra torque on the upstroke and more speed on the down stroke.




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Old 03-05-2004, 07:56:18 AM
leonard keifer
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Default Re: Wacky Pump at Zolfo Springs

Very interesting pump. At first look it seems like someone was heating the gear and dropped it!
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Old 03-05-2004, 12:38:49 PM
J ohn
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Default Re: Wacky Pump at Zolfo Springs

That is a "Kuhlman" brand pumpjack. I don't recall the exact city of mfg, NE Iowa, Waterloo area I think?? Shift "on the go" for more lift on upstoke from well cylinder.
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Old 03-08-2004, 12:52:35 PM
edurand
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Default Re: Wacky Pump at Zolfo Springs

Harry:

I saw that pump, too. It took some good pattern making to get the gears to mesh correctly through the change in pitch diameter.

I think this is a gag pump, because it didn't really need all the changes in centering to get the pitch change to work.

BTW, I looked for you at the show but, since I don't -think- I've ever met you (you coulda introduced yerself!), I didn't find you. It's possible I might have seen you and even talked to you there and at the Flywheeler's show the previous week but you didn't slap me upside 'da haid and say who you wuz.

Take care - Elden
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Old 03-08-2004, 01:42:23 PM
Jim Tremble
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Default Re: Wacky Pump at Zolfo Springs

I have looked at the photos many times and I can't figure out how that thing works. Both the large gear and the small gear shafts look like they are fixed and can not move. Can you explain how the pump jack works ??

Thanks,

Jim
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Old 03-08-2004, 02:28:58 PM
beach
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Default Re: Wacky Pump at Zolfo Springs

actually it wasnt a gag. its a deep well water pump designed to drop the pump rod fast on the downstroke and have extra torque for the up stroke. at least thats the way i have always understood it.
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Old 03-09-2004, 11:13:48 AM
edurand
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Default Re: Wacky Pump at Zolfo Springs

Beach:

I can understand the variable speed idea, but why all the extra useless monkey motion with the gears?

To be practical, the gears would only have to shift twice per revolution, once on the upstroke (fast ratio to get the sucker rod down fast) and once for the downstroke (slow ratio to increase the lifting power on the sucker rod).

I could be wrong (and probably am!).

Take care - Elden
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Old 03-11-2004, 12:41:48 AM
Bill
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Default Re: Wacky Pump at Zolfo Springs

If one looks closely at the small drive gear it has a step taper to give the large gear wheel the different speeds. The twisted design is to get the correct gear teeth meshed. Both the diameter and placement changes with each wave. The other way to have the variable speed effect would be to add another axle and have the large gear wheels equal but off center.
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