US2797916A - Elastic elements for elastic suspensions in general - Google Patents

Elastic elements for elastic suspensions in general Download PDF

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Publication number
US2797916A
US2797916A US389440A US38944053A US2797916A US 2797916 A US2797916 A US 2797916A US 389440 A US389440 A US 389440A US 38944053 A US38944053 A US 38944053A US 2797916 A US2797916 A US 2797916A
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Prior art keywords
elastic
block
frame
general
suspensions
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Expired - Lifetime
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US389440A
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Pellarini Luigi
Rossetti Fabio
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Priority to US389440A priority Critical patent/US2797916A/en
Priority to FR1086153D priority patent/FR1086153A/fr
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/42—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing
    • F16F1/52—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing loaded in combined stresses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2236/00—Mode of stressing of basic spring or damper elements or devices incorporating such elements
    • F16F2236/12—Mode of stressing of basic spring or damper elements or devices incorporating such elements loaded in combined stresses

Definitions

  • the present invention relates to an elastic element for elastic suspensions in general, characterized in that an articulated four faced frame contains a block of material having elastic properties, said block being bound to the four faces of said frame, the cross section (along a plane perpendicular to the articulations of said frame) of said block when in its resting position, having a parallelogram shape, with at least an acute angle, and said element being destined to be stressed so that the opening of said acute angle increases under load.
  • Figure 1 is a perspective view of the frame containing the block of elastic material
  • Figures 2, 3, and 4 show three different positions of said frame when stressed
  • Figure 5 shows the concerned qualitative diagram.
  • 1 is the four faced frame, the surfaces whereof are articulated in 2, 3, 4 and 5.
  • said rubber block 6 is a block of rubber or rubber substitute contained in said frame, bound to the inner surfaces of the aforesaid faces, by means of adhesives.
  • said rubber block 6 When in its resting position, said rubber block 6 has, on a plane perpendicular to the articulations, a cross section having a parallelogram shape with two opposite acute angles 7, 8.
  • Figures 2, 3 and 4 show three different positions of the frame 6 when stressed.
  • the elastic element is connected in its hinging points 2, 3 to the part to be suspended, while the lever 9, of the part receiving the external stresses, is connected on the side 3, 4.
  • the curve 10 is the diagram of the moments due to the stresses produced in the block by causing the frame to deform the block from its position of rest.
  • the area of the front surface of the frame remains constant while the volume of the block varies when the acute angle passes from to and beyond this value changing its sine when passing from 90 to the curve 11 is the diagram of the moments due to shear, and the curve 12 is the resultant of the two aforecited curves and in flexure is inverted in its central portion, corresponding about to the static load.
  • An elastic element, according to this invention, having the characteristic curve 12 has the advantage of avoiding the necessity of braking or damping elements, since the load variations are small for the normal deformation.
  • the load variations are only the ones necessary for bringing again the suspended part to its initial position, by overcoming its inertia.
  • Elastic element for resilient suspensions in general, comprising an articulated four sided frame, within the frame a block of material having high elastic properties bonded to the inner surfaces of the four sides of said frame, said block, when in its resting position having a parallelogram shape in cross section with opposite acute angles, and means cooperating with one of said sides and adapted to stress said block so that the opening of said acute angles increases under load.
  • each plane of the bonding of the block to the frame passes through the axes of two contiguous articulations.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Child & Adolescent Psychology (AREA)
  • Mechanical Engineering (AREA)
  • Eyeglasses (AREA)

Description

ly 2, 1957 L. PELLARIN! ETAL 2,797,916
ELASTIC ELEMENTS FOR ELASTIC SUSPENSIONS IN GENERAL Filgd Oct. 30. 1953 FIG.5.
United States Patent Ofiice 2,797,916 Patented July 2, 1957 Luigi Pellarini, Belmore, New South Wales, Australia, and Fabio Rossetti, Milan, Italy Application October 30, 1953, Serial No. 389,440
3 Claims. (Cl. 261-21) The present invention relates to an elastic element for elastic suspensions in general, characterized in that an articulated four faced frame contains a block of material having elastic properties, said block being bound to the four faces of said frame, the cross section (along a plane perpendicular to the articulations of said frame) of said block when in its resting position, having a parallelogram shape, with at least an acute angle, and said element being destined to be stressed so that the opening of said acute angle increases under load.
One preferred form of embodiment of the present invention is diagrammatically shown, merely by way of example, in the attached drawings, wherein:
Figure 1 is a perspective view of the frame containing the block of elastic material,
Figures 2, 3, and 4 show three different positions of said frame when stressed, and
Figure 5 shows the concerned qualitative diagram.
With reference to the drawings, 1 is the four faced frame, the surfaces whereof are articulated in 2, 3, 4 and 5.
6 is a block of rubber or rubber substitute contained in said frame, bound to the inner surfaces of the aforesaid faces, by means of adhesives. When in its resting position, said rubber block 6 has, on a plane perpendicular to the articulations, a cross section having a parallelogram shape with two opposite acute angles 7, 8.
Figures 2, 3 and 4 show three different positions of the frame 6 when stressed. The elastic element is connected in its hinging points 2, 3 to the part to be suspended, while the lever 9, of the part receiving the external stresses, is connected on the side 3, 4.
The three aforesaid positions are described with reference to Figure 5, showing on abscissae the deformations, and on the ordinates the external loads.
In said Figure 5, the curve 10 is the diagram of the moments due to the stresses produced in the block by causing the frame to deform the block from its position of rest. The area of the front surface of the frame remains constant while the volume of the block varies when the acute angle passes from to and beyond this value changing its sine when passing from 90 to the curve 11 is the diagram of the moments due to shear, and the curve 12 is the resultant of the two aforecited curves and in flexure is inverted in its central portion, corresponding about to the static load.
An elastic element, according to this invention, having the characteristic curve 12 has the advantage of avoiding the necessity of braking or damping elements, since the load variations are small for the normal deformation.
The load variations are only the ones necessary for bringing again the suspended part to its initial position, by overcoming its inertia.
We claim:
1. Elastic element for resilient suspensions in general, comprising an articulated four sided frame, within the frame a block of material having high elastic properties bonded to the inner surfaces of the four sides of said frame, said block, when in its resting position having a parallelogram shape in cross section with opposite acute angles, and means cooperating with one of said sides and adapted to stress said block so that the opening of said acute angles increases under load.
2. Element according to claim 1, in which each plane of the bonding of the block to the frame passes through the axes of two contiguous articulations.
3. Element according to claim 1, in which the articulations are arranged outside of the elastic block, so that the intersections of the bond surfaces coincide with the articulation axis.
References Cited in the file of this patent UNITED STATES PATENTS 1,875,314 Armstrong Aug. 30, 1932 1,919,033 Noble July 18, 1933 2,212,769 Boxan Aug. 27, 1940 FOREIGN PATENTS 25,794 France Feb. 6, 1923 (1st addition to No. 547,570) 275,519 Great Britain Aug. 11, 1927 724,359 Germany Aug. 24, 1942
US389440A 1953-10-30 1953-10-30 Elastic elements for elastic suspensions in general Expired - Lifetime US2797916A (en)

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Application Number Priority Date Filing Date Title
US389440A US2797916A (en) 1953-10-30 1953-10-30 Elastic elements for elastic suspensions in general
FR1086153D FR1086153A (en) 1953-10-30 1953-10-31

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US389440A US2797916A (en) 1953-10-30 1953-10-30 Elastic elements for elastic suspensions in general

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3057592A (en) * 1959-10-12 1962-10-09 Litton Ind Of California Irrotational mount
US4516766A (en) * 1983-02-25 1985-05-14 Game Time, Inc. Resilient support for playground seat

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR547570A (en) * 1921-11-14 1922-12-19 Bour Freres Shock absorbing device for vehicles
FR25794E (en) * 1921-12-13 1923-05-18 Bour Freres Soc Shock absorbing device for vehicles
GB275519A (en) * 1927-03-31 1927-08-11 Alfred Atkinson New or improved spring appliance chiefly for use with vehicles
US1875314A (en) * 1931-11-10 1932-08-30 armstrong
US1919033A (en) * 1927-03-10 1933-07-18 Noble Warren Vehicle suspension
US2212769A (en) * 1935-08-28 1940-08-27 Audi Ag Spring suspension
DE724359C (en) * 1939-01-13 1942-08-24 Ernst Neumann Neander Spring made of rubber or the like.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR547570A (en) * 1921-11-14 1922-12-19 Bour Freres Shock absorbing device for vehicles
FR25794E (en) * 1921-12-13 1923-05-18 Bour Freres Soc Shock absorbing device for vehicles
US1919033A (en) * 1927-03-10 1933-07-18 Noble Warren Vehicle suspension
GB275519A (en) * 1927-03-31 1927-08-11 Alfred Atkinson New or improved spring appliance chiefly for use with vehicles
US1875314A (en) * 1931-11-10 1932-08-30 armstrong
US2212769A (en) * 1935-08-28 1940-08-27 Audi Ag Spring suspension
DE724359C (en) * 1939-01-13 1942-08-24 Ernst Neumann Neander Spring made of rubber or the like.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3057592A (en) * 1959-10-12 1962-10-09 Litton Ind Of California Irrotational mount
US4516766A (en) * 1983-02-25 1985-05-14 Game Time, Inc. Resilient support for playground seat

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Publication number Publication date
FR1086153A (en) 1955-02-10

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