Browse Prior Art Database

Convoluted Pneumatic Cylinder

IP.com Disclosure Number: IPCOM000112153D
Original Publication Date: 1994-Apr-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Phillips, R: AUTHOR [+2]

Abstract

Disclosed is a convoluted pneumatic cylinder with no moving stages and made entirely of rubber which allows an effective stroke length of twice or more the retracted height of the cylinder. This design exhibits significant advantages over the prior pneumatic cylinder art commonly available on the market in that the stroke to height ratio is very large. This is helpful in design applications where a linear motion source is required that can fit into a very compact space but provide a relatively long stroke.

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Convoluted Pneumatic Cylinder

      Disclosed is a convoluted pneumatic cylinder with no moving
stages and made entirely of rubber which allows an effective stroke
length of twice or more the retracted height of the cylinder.  This
design exhibits significant advantages over the prior pneumatic
cylinder art commonly available on the market in that the stroke to
height ratio is very large.  This is helpful in design applications
where a linear motion source is required that can fit into a very
compact space but provide a relatively long stroke.

      Prior art pneumatic cylinders typically provide a stroke that
is less than the retracted height of the body for a stroke to height
ratio of less than 1.  Telescoping arrangements are also available,
and while these can provide a stroke that is greater than the
retracted telescope height, they are not always suitable for
precision mechanism designs because cost constraint reliability and
simplicity are sometimes key factors in producing a product.  The
design disclosed here does not have these constraints/drawbacks, and
can provide a stroke to height ratio of 2 or greater.

      The basis of the design can be seen in the Figure.  This Figure
shows a miniaturized configuration that was used to provide a 22 mm
stroke out of an 11 mm cylinder, but other (i.e., larger, smaller, or
more/fewer convolutes) configurations are possible with similar
benefits.  The design of the convolute is free from traditional
piston/...