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US4716865A Expired / Lapsed US ⏱️ 0.0 years remaining

Inner element for a hydraulic compensation element

Assignee: Motomak Motorenbau Maschinen und Werkzeugfabrik Konstruktionen GmbH
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Filing: 1987-02-10
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Granted: 1988-01-05
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Expires: 2007-02-10
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Abstract

Abstract An inner element for a hydraulic valve clearance compensation element for internal combustion engine comprising a cylindrical element (3) closed on one end and a piston element (5) guided therein for longitudinal displacement and protruding beyond the open end of cylindrical element (3), the piston element (5) having a reduced outer diameter (6) in its protruding portion engaging a radial flange (10) of a restraining element (9) held by a cylindrical collar (13) on the open end of cylindrical element (3), the open end of element (3) having also a reduced outer diameter (7) with an additional diameter reduction in the form of a peripheral groove (8) engaging positively the collar (13) of the restraining element (9) at at least some peripheral points, the restraining element (9) having one projection (11) at at least one peripheral point radially protruding beyond the outer diameter of cylindrical element (3), characterized in that the lengthwise region of collar (13) containing projections (11) engaging radially over the outer diameter of cylindrical element (3) and the lengthwise region of collar (13) engaging peripheral groove (8) of cylindrical element (3) lie axially behind one another without a mutual overlap.

Inventors

  • 👤 Georg Schaeffler

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 00:17
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/20; F01L1/22; F01L1/24; F01L1/2411

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 194 words
An inner element for a hydraulic valve clearance compensation element for an internal combustion engine comprising a cylindrical element (3) closed on one end and a piston element (5) guided therein for longitudinal displacement and protruding beyond the open end of cylindrical element (3), the piston element (5) having a reduced outer diameter (6) in its protruding portion engaging a radial flange (10) of a restraining element (9) held by a cylindrical collar (13) on the open end of cylindrical element (3), the open end of element (3) having also a reduced outer diameter (7) with an additional diameter reduction in the form of a peripheral groove (8) engaging positively the collar (13) of the restraining element (9) at at least some peripheral points, the restraining element (9) having one projection (11) at at least one peripheral point radially protruding beyond the outer diameter of cylindrical element (3), characterized in that the lengthwise region of collar (13) containing projections (11) engaging radially over the outer diameter of cylindrical element (3) and the lengthwise region of collar (13) engaging peripheral groove (8) of cylindrical element (3) lie axially behind one another without a mutual overlap.
Claim 2
Dependent Claim 194 words
An inner element for a hydraulic valve clearance compensation element for an internal combustion engine comprising a cylindrical element (3) closed on one end and a piston element (5) guided therein for longitudinal displacement and protruding beyond the open end of cylindrical element (3), the piston element (5) having a reduced outer diameter (6) in its protruding portion engaging a radial flange (10) of a restraining element (9) held by a cylindrical collar (13) on the open end of cylindrical element (3), the open end of element (3) having also a reduced outer diameter (7) with an additional diameter reduction in the form of a peripheral groove (8) engaging positively the collar (13) of the restraining element (9) at at least some peripheral points, the restraining element (9) having one projection (11) at at least one peripheral point radially protruding beyond the outer diameter of cylindrical element (3), characterized in that the lengthwise region of collar (13) containing projections (11) engaging radially over the outer diameter of cylindrical element (3) and the lengthwise region of collar (13) engaging peripheral groove (8) of cylindrical element (3) lie axially behind one another without a mutual overlap.

References Cited (Backward Citations)

US2941523A Cited
US3358660A Cited
US3516393A Cited
US4227495A Cited
US4621398A Cited
JPS59150914A Cited
US4502428A Cited
JPS60206914A Cited
US4644914A Cited
US4644913A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-01-04 1991-07-06 1992-01-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-01-04 1995-07-06 1996-01-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-01-04 1999-07-06 2000-01-05 $7700.00 Window Closed / Lapsed

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