Patent US3830347A successfully refreshed from Google Patents.
US3830347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shock absorber and dirt shield therefor
Assignee: Tenneco Automotive Europe BVBA
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Filing: 1972-03-30
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Granted: 1974-08-20
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Expires: 1992-03-30
Abstract
Abstract A shock absorber comprising an elongated cylindrical pressure cylinder having a piston reciprocally disposed therewithin and connected to a piston rod extending outwardly from one end thereof, the piston rod carrying a dirt shield which extends coaxially of the pressure cylinder and in partial surrounding relationship therewith. The pressure cylinder is adapted to be filled with preselected quantities of a hydraulic damping fluid and a pressurized gas for damping reciprocal movement of the piston therewithin. The piston is provided with a novel valve arrangement which controls the compression and rebound characteristics of the shock absorber, and one end of the pressure cylinder is provided with a novel rod guide assembly which is designed so as to provide for convenient charging of the cylinder with the aforesaid pressurized gas. The interior of the pressure cylinder is provided with a generally helically shaped baffle arrangement which is compressible axially within the cylinder in response to reciprocal movement of the piston therein and functions to prevent undesirable foaming or aeration of the hydraulic fluid during operation of the shock absorber.
Inventors
- 👤 J Fader
- 👤 R Beets
- 👤 J Keijzer
- 👤 M Graulus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:55
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/10; F16F9/14; F16F9/16; F16F9/18; F16F9/19; F16F9/32; F16F9/36; F16F9/362; F16F9/38; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49909
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
268 words
In combination in a shock absorber, an elongated cylindrical body member, a piston reciprocally mounted within said member, a piston rod connected to said piston and having an outer end extending axially from one end of said body member, a generally cylindrically-shaped dirt shield disposed in surrounding relationship with at least a porrion of said outer end of said piston rod, an end cap mounted on said outer end of said piston rod, said dirt shield being of substantially uniform diameter and having a free end portion at the opposite end thereof from said end cap, said end cap comprising a central section affixed to said piston rod and a generally axially extending annular section arranged coaxially of said piston rod and adapted to be telescopically received within the end of said dirt shield opposite said free end thereof, a retaining ring, including an annular section, for fixedly securing said dirt shield to said end cap extending around the radially outer side of said dirt shield, said annular sections being of substantially equal axial lengths and concentrically and coaxially oriented, with said first mentioned of said sections having a portion thereof removed so as to define an opening extending radially through said one annular section, the other of said sections having a portion thereof aligned with said opening and displaced radially inwardly toward said one section, whereby to deform the portion of the adjacent end of said dirt shield disposed radially between said sections and aligned with said opening radially inwardly into said opening to fixedly secure said retaining ring and said enclosure member upon said end cap.
Claim 2
Dependent Claim
268 words
In combination in a shock absorber, an elongated cylindrical body member, a piston reciprocally mounted within said member, a piston rod connected to said piston and having an outer end extending axially from one end of said body member, a generally cylindrically-shaped dirt shield disposed in surrounding relationship with at least a porrion of said outer end of said piston rod, an end cap mounted on said outer end of said piston rod, said dirt shield being of substantially uniform diameter and having a free end portion at the opposite end thereof from said end cap, said end cap comprising a central section affixed to said piston rod and a generally axially extending annular section arranged coaxially of said piston rod and adapted to be telescopically received within the end of said dirt shield opposite said free end thereof, a retaining ring, including an annular section, for fixedly securing said dirt shield to said end cap extending around the radially outer side of said dirt shield, said annular sections being of substantially equal axial lengths and concentrically and coaxially oriented, with said first mentioned of said sections having a portion thereof removed so as to define an opening extending radially through said one annular section, the other of said sections having a portion thereof aligned with said opening and displaced radially inwardly toward said one section, whereby to deform the portion of the adjacent end of said dirt shield disposed radially between said sections and aligned with said opening radially inwardly into said opening to fixedly secure said retaining ring and said enclosure member upon said end cap.
Claim 3
Dependent Claim
37 words
The invention as set forth in claim 1 wherein said first mentioned annular section is formed with a plurality of circumferentially spaced removed portions defining a plurality of openings extending radially through said first mentioned annular section.
Claim 4
Dependent Claim
50 words
The invention as set forth in claim 1 wherein said annular section on said end cap is formed with a plurality of circumferentially spaced openings extending radially therethrough, and wherein said annular section on said retaining ring comprises a plurality of radially inwardly deformed portions circumferentially aligned with said openings.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |