Telescopic shock absorber

• US 4,010,940 A
• Filed: 08/05/1975
• Issued: 03/08/1977
• Est. Priority Date: 08/14/1974
• Status: Expired due to Term

• Current Assignee: Adalbert Freyler
• Original Assignee: Adalbert Freyler
• Inventors: Freyler, Adalbert
• Primary Examiner(s): Marbert, James B.
• Application Number:
  US05/602,101
• Time in Patent Office: 581 Days
• Field of Search: 267/9 C, 267/9 B, 267/9 R, 267/35, 267/64, 267/63 R, 267/153, 267/152, 267/61, 188/271, 188/129, 188/1 B, 293/1, 293/60, 293/DIG. 2, 213/45
• US Class Current: 267/201
• CPC Class Codes: B60G 15/00 Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type combined spring and vibration-dampers per se F16F
• CPC Class Codes: F16F 13/002 comprising at least one fluid spring F16F13/005, F16F13/02, F16F13/04 take precedence
• CPC Class Codes: F16F 7/09 in dampers of the cylinder-and-piston type

Abstract

A telescopic shock absorber having means in the slide path of the piston rod for producing resistance to sliding and braking of the return movement of the rod including a plurality of compressible spheres with expansion and centering rings positioned between the spheres. Also included are a pair of slanting brake discs secured to the rod, as well as a slanting wedge positioned therebetween.

Claims

1. A telescopic shock absorber comprising:

a. a cylindrical tube,

b. a piston rod extending into said tube, said piston rod having a piston thereon received within said tube and comprising;

an endpiece secured to the end of said piston rod;

a pair of brake discs slidingly received on said rod inwardly of said endpiece and mounted to have no radial movement with respect to said rod, said brake discs having oppositely directed, confronting slanted surfaces thereon;

a wedge received between said brake discs and mounted for radial shifting relative to said rod, said wedge having oppositely directed slanting surfaces on the opposite sides thereof extending generally parallel to the confronting slanted surfaces on said brake discs; and

resilient means inwardly of said brake discs for urging said brake discs toward said endpiece; and

c. means in the slide path of the rod engageable by said endpiece for producing resistance to sliding movement of the rod, including compressible members having a circular cross-section.

2. A telescopic shock absorber as defined in claim 1 wherein said compressible members are a plurality of spheres.

3. A telescopic shock absorber as defined in claim 2 wherein said spheres are hollow.

4. A telescopic shock absorber as defined in claim 2 wherein said spheres are substantially axially alligned.

5. A telescopic shock absorber as defined in claim 4 including an expansion and centering elastic ring being positioned between said alligned spheres.

6. A telescopic shock absorber comprising:

a a cylindrical tube;

b a piston rod extending into said tube;

c means in the slide path of the rod for producing resistance to sliding and braking of the return movement of the rod, including compressible members having a circular cross-section, said compressible members being a plurality of substantially axially aligned spheres; and

d an expansion and centering elastic ring positioned between each pair of said aligned spheres, wherein said rings have surfaces facing said spheres, said surfaces being in the shape of hollow cones, the tilt angle of the cones being larger than the diameter of said spheres.

7. A telescopic shock absorber as defined in claim 6, including a pair of brake discs slidingly received on said rod and mounted to have no radial movement with respect to said rod, said brake discs having oppositely directed, confronting slanted surfaces thereon, and a slanting wedge positioned between said brake discs surrounding said rod and axially and radially movable relative thereto, said wedge having oppositely directed slanting surfaces on the opposite sides thereof extending generally parallel to the confronting slanted surfaces on said brake discs.

8. A telescopic shock absorber as defined in claim 7, including a pair of second discs, one of said second discs being positioned between each set of confronting slanted surfaces on said brake discs and said wedge.

9. A telescopic shock absorber as defined in claim 7 wherein said discs and wedge have a surface in contact with the wall of said tube and another surface separated a distance from the tube wall.

10. A telescopic shock absorber as defined in claim 7 including spring tension means on said rod urging said brake discs and wedge against an endpiece attached to said piston.

11. A telescopic shock absorber as defined in claim 6 wherein said spheres have a diameter less than the inside diameter of said tube.

12. A telescopic shock absorber as defined in claim 6 including an endpiece on said rod having a hollow, conical surface for receiving the uppermost sphere therein.

13. A telescopic shock absorber as defined in claim 6, wherein said rings are split.

14. A telescopic shock absorber as defined in claim 6, wherein said spheres are hollow.