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Valveless Cone Air Dasher: A Hollow Cone and Four Tubes, Nothing to Wear Out

Josiah A. Gridley, Southampton, Massachusetts · Public domain (expired patent)

أنشأه

YourGrandma

6. أكتوبر 2026

Valveless Cone Air Dasher: A Hollow Cone and Four Tubes, Nothing to Wear Out

Gridley wanted to force air under the cream "without the employment of valves or other movable parts in the dasher, which are liable to get out of order," and without a hollow handle. Josiah A. Gridley of Southampton, Massachusetts, received US 6,411, dated 1 May 1849, for a churn-dasher of a straight round stick with a hollow cone on its lower end. Near the apex are four holes, more or less, through the cone; from them small tubes run down the outside to near its base, ending in open ends above the base. Forced into the cream, the cone traps air, which is drawn out through the tubes and disperses through the cream. This rung works out the air the cone holds, then prints the cone with its tubes in one piece, fits it to a stick, and makes butter in a jar.

مبتدئ

About 1 hour, plus printing

التعليمات

Air in the cone

جارٍ تحميل دفتر Jupyter…

A hollow dash that carries air down before it

The embedded blueprint traps air in a hollow cylinder and squeezes it out over a fixed block. Gridley's cone needs no block, spindle or valve.

Read US 6,411

"When this dasher is forced into the cream it incloses and compresses a quantity of air; and as the cream rushes up into it the air is drawn out through the tubes (a partial vacuum being created at their openings above the cone) and disperses through the cream, and agitates it as other air dashers. It is obvious that other figures than a cone would answer, and would be substantially the same thing."

Print the cone

Print the cone base-down in one piece (/uploads/blueprints/valveless-cone-air-dasher-cone.stl): a hollow cone 90 mm across with four tubes from holes near its apex down the outside to just above its base, and a socket for the stick. Blow through each tube to check it is clear. Print in PETG at 0.2 mm layers, 30 % infill, 4 walls; wash before first use.

المواد لهذه الخطوة:

خيط PETG1 قطعة

الأدوات المطلوبة:

طابعة ثلاثية الأبعاد بالخيط (FDM)

Fit the stick

Glue a 12 mm hardwood dowel, as long as the jar is deep plus 150 mm, into the cone's socket.

المواد لهذه الخطوة:

أوتاد من خشب صلب1 قطعة

غراء خشب1 قطعة

الأدوات المطلوبة:

منشار يدوي

ورق صنفرة

The churn

Take a tall wide jar about 170 mm across and drill its lid at the centre for the stick.

المواد لهذه الخطوة:

مرطبان زجاجي1 قطعة

الأدوات المطلوبة:

مثقاب لاسلكي

طقم لقم ثقب

The build in 3D

FreeCAD model of this build, not of the patent: the jar cut away to show the hollow cone on its stick with the four tubes from near its apex to just above its base.

ملف التصميمBLENDCC0 - Free

تنزيل النموذج

Dash and make butter

Let the heavy cream stand until it reaches about 15 °C, checked with the thermometer. Pour in 1 litre. Work the stick up and down like a common dasher, lifting the cone clear of the cream each time so it fills with air; watch for bubbles from the tubes. 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.

المواد لهذه الخطوة:

قشدة كاملة الدسم1000 مل

ملح بحري خشن1 قطعة

ماء1 قطعة

الأدوات المطلوبة:

مقياس حرارة بمجس يبقى داخل الطعام

ساعة إيقاف

ميزان مطبخ رقمي

وعاء خلط كبير من فولاذ مقاوم للصدأ

No bubbles, blocked tubes

Valveless cone air dasher troubleshooting.

Flow

History and honest limits

**Josiah A. Gridley** of Southampton, Hampshire County, Massachusetts, received US 6,411, dated 1 May 1849. His cone was "of metal or other suitable material" and his handle "a straight round stick." He claimed the dasher made concave, with openings around it for dispersing air through the cream, without valves. **Honest limits.** A printed cone stands in for his metal one, and a jar for his churn. The notebook's figures are estimates. FDM prints hold food in their layer lines, so wash well and replace when worn. Your times and weights are the result.