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Valved Hollow-Staff Plunger Churn: A Valve at the Top, Air Forced Out at the Foot
TheChef

작성자

TheChef

6. 10월 2026DK
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Valved Hollow-Staff Plunger Churn: A Valve at the Top, Air Forced Out at the Foot

Ellicott's dasher draws its air down through its own handle. Peter F. Ellicott of Philadelphia, Pennsylvania, received US 7,454, dated 25 June 1850, for an atmospheric churn: "in any ordinary vertical churn," an upright hollow staff connected at the bottom to a square or round hollow plunger open below, with air holes in its sides "1/2 inch in diameter," and a valve inside the staff at its top "so arranged that when the said staff and plunger are raised, the valve will open," and when forced down "the valve will close, and the atmospheric air in the plunger will be forced through the body of the milk or cream." This rung works out the air per stroke, then prints the plunger and valve cap, fits them to a hollow staff, and makes butter.
초급
About 1 hour, plus printing

안내

1

Air per stroke

Jupyter 노트북 불러오는 중…
2

A hand dasher that pumps air before it

The embedded blueprint pumps air with a tube over a loose plunger. Ellicott's air comes down a hollow staff through a valve at its top.
3

Read US 7,454

"C, Fig. 1 is a square or round dasher or plunger being hollow and open at the lower end with air holes, in the sides, 1/2 inch in diameter, and knobs outside. D, Fig. 2 is a full size section of valve placed on the top of the staff B, Fig. 1."
4

Print the parts

Print the hollow plunger open end down (/uploads/blueprints/valved-hollow-staff-plunger-churn-plunger.stl), with its twelve side holes and a socket for the staff, and the valve cap (/uploads/blueprints/valved-hollow-staff-plunger-churn-valve-cap.stl). 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

Staff and valve

Cut a length of 12–13 mm food-grade tube as the hollow staff, as long as the churn is deep plus 150 mm, and glue it into the plunger's socket. Glue a small leather flap inside the valve cap over its port, hinged on the cap's pin, so it lifts to let air in as the staff rises and seats as it falls; glue the cap on the staff's top.

이 단계의 재료:

PVC 파이프PVC 파이프1 개
가죽 띠가죽 띠1 개
2액형 에폭시2액형 에폭시1 개

필요한 도구:

쇠톱(핵소)쇠톱(핵소)
사포사포
6

The churn

Drill a food-grade bucket's lid at the centre for the staff, a little larger than it.

이 단계의 재료:

20리터 양동이20리터 양동이1 개

필요한 도구:

무선 드릴무선 드릴
홀소 세트홀소 세트
7

The build in 3D

FreeCAD model of this build, not of the patent: the churn cut away to show the hollow plunger with its side holes, the hollow staff through the lid and the valve cap on top.
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 staff up and down; bubbles should burst from the plunger's holes 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, cream up the staff

Valved hollow-staff plunger churn troubleshooting.

Flow

Loading...
10

History and honest limits

**Peter F. Ellicott** of Philadelphia, Pennsylvania, received US 7,454, dated 25 June 1850. His drawing shows the plunger with knobs outside and a full-size section of the valve. He claimed "a hollow staff connected with a square or round hollow plunger, with a valve placed at the top, or at any point inside of said staff," to be used in any vessel containing milk or cream. **Honest limits.** Food-grade tube and printed parts stand in for his staff, plunger and valve; our holes are smaller than his half inch. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.

재료

8
  • 플레이스홀더
  • 플레이스홀더
  • 플레이스홀더
  • 플레이스홀더
  • 플레이스홀더
  • 2000 ml
    플레이스홀더
  • 플레이스홀더
  • 1 개
    플레이스홀더

필요 도구

9

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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