29 Pneumatics and hydraulics

Use gas and liquid parts of an object instead of solid parts (e.g. inflatable, filled with liquids, air cushion, hydrostatic, hydro-reactive).
  • Comfortable shoe sole inserts filled with gel
  • Store energy from decelerating a vehicle in a hydraulic system, then use the stored energy to accelerate later.
TRIZ principe 29


Is this principle frequently used?

This principle is moderately used with 118 instances in the matrix.

This principle is proposed to solve the following contradictions:

Click on a contradiction to explore it

1/3 1/5 1/7 1/17 1/35 1/37 2/4 2/11 2/12 2/35 3/1 3/12 3/14 3/23 3/25 3/26 3/27 3/29 3/32 3/33 3/39 4/2 4/25 4/27 5/1 5/9 5/12 5/26 5/27 6/29 7/1 7/9 7/12 7/26 7/32 7/35 7/37 9/5 9/7 9/26 10/26 10/29 11/2 12/1 12/3 12/23 12/35 12/36 13/20 14/5 14/25 14/26 14/39 15/34 15/36 15/37 17/23 19/12 19/36 20/13 21/12 22/39 23/3 23/7 23/12 23/27 23/31 25/3 25/14 25/17 25/36 26/3 26/5 26/7 26/9 26/19 26/30 26/32 26/33 26/35 26/37 26/39 27/4 27/23 27/39 29/3 29/5 29/6 30/26 30/36 30/37 31/24 32/1 32/3 32/7 33/12 33/15 34/15 35/2 35/3 35/5 35/7 35/19 35/21 35/36 36/12 36/19 36/23 36/25 36/30 36/35 37/7 37/15 37/26 37/30 37/32 39/14 39/22


The colour indicates the ranking of the proposed principle to solve the contradiction: 1st, 2nd, 3rd, 4th.
This ranking reflects the frequency of occurrence of the principle in the analysed patents for this type of contradiction.
When a principle appears in first position, it means that it is statistically the most used in the patents studied for this type of problem.