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Air-Pump Tube Dasher: A Tube Over a Loose Plunger Pumps Air at Every Stroke
Emma

작성자

Emma

6. 10월 2026SE
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Air-Pump Tube Dasher: A Tube Over a Loose Plunger Pumps Air at Every Stroke

Wright wanted a hand dasher that "will operate as an air pump to force a stream of air into the cream at the same time that it agitates it." William M. Wright of Pittsburgh, Pennsylvania, received US 6,711, dated 11 September 1849, for an atmospheric churn-dasher: a tube of tinned sheet iron with a flange on its lower end, a cap with a valve opening inward, and a handle; inside, a loose cylinder of wood weighted at its lower end rests on the bottom of the tub as a plunger. Worked like a common dasher in "almost any ordinary pail or dairy vessel," it discharges air among the cream on each descent and refills on each ascent. This rung works out the air per stroke, then prints the cap, flange and plunger, assembles them on a pipe, and makes butter in a pail.
초급
About 1 hour, plus printing

안내

1

Air per stroke

Jupyter 노트북 불러오는 중…
2

A dash closing over a fixed block before it

The embedded blueprint squeezes air from a hollow dash over a block fixed to the churn. Wright's plunger is loose, so it needs no fixing at all.
3

Read US 6,711

"From the fact of the piston resting loosely upon the bottom of the tub, and being capable of moving about and occupying a vertical or inclined position as may best suit the convenience of the operator, and also from the facility with which it and the dasher may be removed from the churn tub and cleaned, and from the simplicity of all the parts being a guarantee against their getting out of order, this apparatus is applicable to churning cream in either large or small quantities."
4

Print the parts

Print the cap (/uploads/blueprints/air-pump-tube-dasher-cap.stl) with its side valve port and handle socket, the foot flange (/uploads/blueprints/air-pump-tube-dasher-flange.stl), and the plunger (/uploads/blueprints/air-pump-tube-dasher-plunger.stl), whose foot has a pocket for a steel weight. Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.

이 단계의 재료:

PETG 필라멘트PETG 필라멘트1 개

필요한 도구:

FDM 3D 프린터FDM 3D 프린터
5

Valve and weight

Glue a small leather flap inside the cap over the valve port, along its top edge only, so air enters and cannot leave. Glue an M10 carriage bolt into the plunger's pocket, so it sinks in cream as he weighted his with metal.

이 단계의 재료:

가죽 띠가죽 띠1 개
둥근머리 볼트둥근머리 볼트1 개
2액형 에폭시2액형 에폭시1 개

필요한 도구:

드라이버 세트드라이버 세트
6

Assemble

Cut 300 mm of 50 mm pipe. Push the flange onto its foot and the cap onto its top, and glue a hardwood dowel handle in the cap's socket. Stand the plunger in a tall food-grade bucket and lower the tube over it.

이 단계의 재료:

PVC 파이프PVC 파이프1 개
단단한 나무 목심단단한 나무 목심1 개
20리터 양동이20리터 양동이1 개
2액형 에폭시2액형 에폭시1 개

필요한 도구:

쇠톱(핵소)쇠톱(핵소)
사포사포
7

The build in 3D

FreeCAD model of this build, not of the patent: the pail, tube and flange cut away to show the loose weighted plunger standing on the bottom inside the tube, the cap with its valve, and the handle.
디자인 파일BLENDCC0 - Free
8

Dash and make butter

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 2 litres. Work the tube up and down over the plunger; bubbles should burst from under the flange on each down-stroke. Time until the butter comes. Pour off the buttermilk, add cold water, churn a little and pour off again until it runs clear; work in a pinch of salt and weigh the butter.
단계 8 - Image 1

이 단계의 재료:

생크림생크림2000 ml
굵은 천일염굵은 천일염1 개
물물1 개

필요한 도구:

꽂아 두는 프로브 온도계꽂아 두는 프로브 온도계
스톱워치스톱워치
디지털 주방 저울디지털 주방 저울
큰 스테인리스강 믹싱볼큰 스테인리스강 믹싱볼
9

No bubbles, a plunger that floats

Air-pump tube dasher troubleshooting.

Flow

Loading...
10

History and honest limits

**William M. Wright** of Pittsburgh, Allegheny County, Pennsylvania, received US 6,711, dated 11 September 1849. The plunger was to be "specifically heavier than cream," or wood weighted with a plug of metal; the tub could be any pail, "particularly, if it be deep in comparison with its width." He claimed the combination of the loose plunger with the tubular dasher. **Honest limits.** A pipe and printed parts stand in for his tinned sheet-iron tube; use a food-grade pipe. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.

재료

10

필요 도구

8

디자인 파일

1

이 블루프린트로 만드는 것

CC0 퍼블릭 도메인

이 블루프린트는 CC0로 공개되었습니다. 어떤 목적으로든 자유롭게 복사, 수정, 배포 및 사용할 수 있습니다.

제품 구매를 통해 메이커를 지원하세요. 판매자가 설정한 메이커 커미션 을 받거나, 이 블루프린트의 새로운 반복을 만들어 연결로 포함시킬 수 있습니다.

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