Apparatus for periodically delivering a predetermined quantity o

Details Apparatus for periodically delivering a predetermined quantity o Apparatus for periodically delivering a predetermined quantity o

1976-03-29

1976-11-30

Pellegrino, Stephen C.

Tobacco

Tobacco users' appliance

Device used for smoking

73 23, 417415, A24F 1300, A24F 4700

Patent

active

039943070

ABSTRACT:
An apparatus for delivering accurately metered volumes of a fluid at accurately spaced intervals. A pumping assembly including a cylinder, piston and fluid valving means are driven through a first cam which controls the volume of fluid pumped and a second cam, driven by the same synchronous motor used to drive the first cam, is used to control the engagement and disengagement of the first cam and hence to control the intervals between pumping cycles. When used as a smoking machine for animal tests, an additional air inhalation valve is provided and the apparatus is arranged to be connected to a gas reservoir attachable to the animal in a manner to create minimum interference with his normal breathing.

REFERENCES:
patent: 2228216 (1941-01-01), Morgan
patent: 3460374 (1969-08-01), Parks
patent: 3548840 (1970-12-01), Baumgartner

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