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Disclosed is a device wherein an air cylinder piston can be extended to many times the overall height of its cylinder chamber, and subsequently retracted completely into said chamber.
English (United States)
This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately
62% of the total text.
Page 1 of 2
Telescoping Air Cylinder
Disclosed is a device wherein an air cylinder piston can be extended to
many times the overall height of its cylinder chamber, and subsequently retracted
completely into said chamber.
The basic piston design, shown in the figure, allows each piston to travel the
overall length of the chamber cavity (X dimension) minus the piston base length
(Z dimension). As each intermediate piston has identical dimensions for both X
and Z, and the internal bore of a given intermediate piston is the chamber for the
next piston, it can be seen that each piston will travel this distance, thus enabling
the total stroke to far exceed the overall height of the cylinder chamber.
The total stroke can be formulated by multiplying the number of pistons by
the X-Z dimension.
It should be noted here that, for simplicity, the figure shows only a single
intermediate piston and an inner piston. However, it is, of course, possible to use
many more intermediate pistons to obtain the required stroke. This is made
possible, in part, by the use of two sets of double "O" rings on the outer walls of
both the chamber and the piston base, which virtually eliminates any danger of
the pistons tilting and jamming.
A system has been built utilizing 4 intermediate and 1 inner piston whose
total stroke is in excess of 3 times the actual height of the cylinder chamber.
The retract cycle is obtained by means of simple valving, whereby when
retract air is applied to the outer piston, i...