Hydrospring

A hydrospring or hydro-spring is a spring damped by hydraulic fluid (typically oil) being driven through holes in a piston, as the piston moves in response to a force. The spring is often made of rubber. Inside a rubber hydrospring there are hydraulic viscous damping systems which damp movement in all three directions but require very few parts. Even the slack adjustment may be integrated into the element.^[1]

Hydrosprings are used mainly as shock absorbers in applications such as damped suspension in railway bogies, bulldozer blade shock absorbers and as recoil absorbers for artillery.

• 
  A railway type rubber hydrospring^[2]
• 
  A railway type rubber hydrospring in compressed state
• 
  A railway type rubber hydrospring in relaxed state
• 
  Hydro-spring recoil system of British WWI 60 pounder gun, with working explained

See also

• Dashpot

References

1. Hecht, Markus (2007). Wear and Energy Saving Bogie Design with Rubber Primary Springs – Principles and Experiences (pdf). IHHA Specialist Technical Session (STS). Kiruna, Sweden.
2. EP patent 1369616

• Army Dictionary - see hydrospring
• Army Dictionary - see recoil cylinder
• A railway hydrospring