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SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
Definition statement
This subclass covers:

Springs, shock-absorbers or vibration-dampers;

Their arrangement in, or adaptation for, particular apparatus if not provided for in the subclasses covering said apparatus.

References relevant to classification in this subclass

Examples of places where the subject matter of this subclass/group is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Spring mattresses

Springs or shock-absorbers for protheses

Vibration dampers in skis

Vehicle suspensions

Mounting of bumpers on vehicles

Rail vehicle suspensions

Buffers for railway or tramway vehicles

Vehicle chassis frames having impact absorbing means

Resiliently mounted saddles on cycles

Steering dampers

Anti-vibration mounting of marine propulsion plant in ships

Arrangement of shock-absorbers or springs in aeroplane alighting gear

Containers, packing elements or packages with shock-absorbing means

Resilient mountings in washing machines

Resilient mountings in domestic spin-dryers

Protection of buildings against vibrations or shocks

Braking devices with springs structurally combined with hinges

Spring motors

Pipe or cable supports

Resilient mounting of lighting devices

Gun cradles to permit recoil

Vibration dampers for archery bows

Weighing apparatus, e.g. arrangement of shock-absorbers in weighing apparatus

Springs for clocks or watches

Damping of movements in instruments

Disposition of shock-absorbing devices for displaceable control elements in nuclear reactors

Arrangements or devices for damping mechanical oscillations of power lines

Informative references
Attention is drawn to the following places, which may be of interest for search:

Indicating or recording in connection with measuring

Special rules of classification within this subclass

For the whole F16F range, consider the indexing range F16F 2222/00 to F16F 2238/045

Glossary of terms
In this subclass, the following terms (or expressions) are used with the meaning indicated:

Steel or metal

Mention of “steel” or “metal” in groups F16F, unless specific mention is made otherwise, should be seen in the light of the title of group F16F 1/00, i.e. material having low internal friction. This normally includes composite materials such as fibre-reinforced plastics.

Rubber or plastics

Mention of “rubber” or “plastics” in group F16F, unless specific mention is made otherwise, should be seen in the light of the title of group F16F 1/36, i.e. material having high internal friction. This normally does NOT include composite materials such as fibre-reinforced plastics except in the case of groups F16F 1/366 to F16F 1/3686 and F16F 15/305.

Springs (working with fluid F16F 5/00 , F16F 9/00)
Definition statement
This group covers:

Springs and spring elements made of elastic material

References relevant to classification in this group
This group does not cover:

Springs working with fluid

Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic ({F16F 1/32 , F16F 1/34 , F16F 7/14 take precedence } ; if including fluid springs F16F 5/00 , F16F 13/00)
Definition statement
This group covers:

Spring units comprising several springs made of elastic material, e.g. springs which are superposed upon each other or springs arranged in parallel

References relevant to classification in this group
This group does not cover:

Springs working with fluid or including fluid spring

Liquid springs in which the liquid works as a spring by compression, e.g. combined with throttling action; Combinations of devices including liquid springs{(dampers with solid or semi-solid material F16F 9/30)}
Definition statement
This group covers:

Spring devices in which the compressibility of the liquid (specifically not a gas) is a key feature

References relevant to classification in this group
This group does not cover:

Dampers with solid or semi solid material

Magnetic springs;{(magnetic spring arrangements for the suppression of vibration in systems F16F 15/03)}; Fluid magnetic springs,{i.e. magnetic spring combined with a fluid}
Definition statement
This group covers:

Spring device in which the spring effect is given by magnetic attraction or repulsion; the device may work with permanent magnets or electromagnets

References relevant to classification in this group
This group does not cover:

Magnetic spring arrangements for the suppression of vibration in systems

Vibration-dampers; Shock-absorbers (using fluid F16F 5/00 , F16F 9/00 ; specific for rotary systems F16F 15/10 ; { belt tensioners F16H 7/12})
Definition statement
This group covers:
  • One shot absorbers
  • Vibration dampers using friction between particles
  • Vibration dampers using friction between surfaces
  • Vibration dampers using inertia effect
  • Vibration dampers or shock absorbers using plastic deformation
  • Vibration dampers of cable support type
References relevant to classification in this group
This group does not cover:

Vibration dampers using fluid

Vibration dampers specific for rotary systems

Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium (F16F 5/00 takes precedence; connection of valves to inflatable elastic bodies B60C 29/00 ; { braking devices, stops or buffers for wing-operating appliances E05F 3/00 , E05F 5/00})
Definition statement
This group covers:

Movement-dampers using a fluid (i.e.: compressible or incompressible) as damping medium

Some examples:

  • gas springs,
  • hydraulic shock absorbers using liquid only, the damping effect being achieved by throttling or viscous shear
  • hydraulic shock absorbers using liquid and gas in combination
References relevant to classification in this group
This group does not cover:

Connection of valves to inflatable elastic bodies

Braking devices, stops or buffers for wing-operating appliances

Using liquid springs

Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs (F16F 5/00 , {F16F 6/00 , F16F 9/003}take precedence)
Definition statement
This group covers:

Devices comprising a combination of a plastic springs (e.g. elastomeric springs) and dampers using friction or fluid

References relevant to classification in this group
This group does not cover:

Using liquid springs

Unit comprising a magnetic spring

Device comprising a sponge rubber as pressure absorbing means

Suppression of vibrations in systems ({damping of non-rotary systems using inertia effect F16F 7/10 ; prevention or isolation of vibrations in machine tools B23Q 11/0032 ; suppression of driveline vibrations in hybrid vehicle transmissions B60W 30/20} ; vehicle seat suspension devices B60N 2/50 ; { methods or devices for protecting against, or damping of, acoustic waves, e.g. sound G10K 11/16}); Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion ({vibration absorbing or balancing means for aircraft propellers B64C 11/008 , for rotorcraft rotors B64C 27/001} ; testing static and dynamic balance of machines or structures G01M 1/00)
Definition statement
This group covers:

Suppression of vibrations in rotating as well non rotating systems; and means or arrangements for avoiding or reducing out-of-balance forces; some examples:

  • Systems characterised by the control method or their control circuitry
  • Systems using electro- or magnetostrictive actuation means
  • Suppression of vibrations of non-rotating, e.g. reciprocating systems
  • Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
  • Suppression of vibrations in rotating systems by making use of members moving with the system
  • Suppression of vibrations of rotating systems by favourable grouping or relative arrangements of the moving members of the system or systems
  • Compensation of inertia forces
  • Additional weights counterbalancing inertia forces induced by the reciprocating movement of masses in the system
  • Flywheels
References relevant to classification in this group
This group does not cover:

Prevention or isolation of vibrations in machine tools

Vehicle seat suspension devices

Absorbing or balancing means for aircraft propellers

Absorbing or balancing means for rotorcraft rotors

Damping of non-rotary systems using inertia effect

Methods or devices for protecting against, or damping of, acoustic waves, e.g. sound

Informative references
Attention is drawn to the following places, which may be of interest for search:

Testing static and dynamic balance of machines or structures

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Last Modified: 10/11/2013