Patent CA1255607A successfully refreshed from Google Patents.
CA1255607A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Housing for a valve actuating push rod
Assignee: KHD Canada Inc
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Filing: 1984-04-19
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Granted: 1989-06-13
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Expires: 2004-04-19
Abstract
Abstract ABSTRACT OF THE DISCLOSURE A housing is proposed for a valve actuating push rod with a protective tube enclosing the push rod, one end of the tube being adapted to be inserted into an aperture in the crankcase and the other end into an aperture in the cylinder head or rocker arm housing of an internal combustion engine, the tube being adapted to be sealed in the apertures by means of O-rings, each O-ring being arranged for the purpose of sealing one end of protective tube, in a space of substantially trapezoidal or rectangular cross-section formed by a groove, provided in protective tube, and a groove provided in the aperture in the crankcase or in the cylinder head or in the rocker arm housing, the grooves unit-ing to produce an O-ring groove of standard depth. Such arrangement allows the protective tube to be not only sealed but also locked axially in the space, thus eliminating the need for additional retaining elements.
Inventors
- 👤 Dieter Hilker
- 👤 Pavel J. Slezak
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-06 14:48
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/46; F02; F02B; F02B2275/00; F02B2275/34
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
131 words
A housing for a valve actuating push rod in an internal combustion engine, with a protective tube enclosing the push rod from the crankcase to the rocker arm housing, one end of the tube being adapted to be inserted into an aperture in the crankcase, and the other end into an aperture in the rocker arm housing, and the tube being adapted to be sealed in the apertures by means of O-rings, each arranged in a channel, characterized in that said O-ring at one end of the protective tube is arranged in a common space formed by a groove provided in the protective tube and a groove provided in the aperture, in the crankcase or in the rocker arm housing, said grooves uniting to form an O-ring groove of standard depth.
Claim 2
Dependent Claim
131 words
A housing for a valve actuating push rod in an internal combustion engine, with a protective tube enclosing the push rod from the crankcase to the rocker arm housing, one end of the tube being adapted to be inserted into an aperture in the crankcase, and the other end into an aperture in the rocker arm housing, and the tube being adapted to be sealed in the apertures by means of O-rings, each arranged in a channel, characterized in that said O-ring at one end of the protective tube is arranged in a common space formed by a groove provided in the protective tube and a groove provided in the aperture, in the crankcase or in the rocker arm housing, said grooves uniting to form an O-ring groove of standard depth.
Claim 3
Dependent Claim
29 words
A housing for a valve actuating push rod according to claim 1, characterized in that one of the grooves of the common space has a rounded off lead-in (R14).
Claim 4
Dependent Claim
51 words
A housing for a valve actuating push rod according to claim 2, characterized in that the groove, provided with the rounded off lead-in (R14), is provided in the aperture in the crankcase or the rocker arm housing, while the groove in the protective tube forms more than 80% of said space.
Claim 5
Dependent Claim
86 words
A housing for a valve actuating push rod according to claim 1, characterized in that the diameter (D14) of the aperture provided for the common space is between 1.6 and 2.05% smaller than the maximal diameter of the groove (DT14) running from it, and in that the maximal outside diameter (D13) of the end, adapted to be inserted into said aperture of the protective tube is between 2 and 3% smaller than the diameter (D14) of said aperture of said crankcase or said rocker arm housing.
Claim 6
Dependent Claim
49 words
A housing for a valve actuating push rod according to one of claims 2 to 4, characterized in that the rounded-off lead-in (R14) of the one groove of the common space has a radius of between 0.5 and 1.0 of the diameter (DR) of the O-ring to be accommodated.
Claim 7
Dependent Claim
38 words
A housing for a valve actuating push rod according to claim 1, characterized in that the O-ring at the other end of the protective tube is provided exclusively in the trapezoidal or rectangular groove in said protective tube.
Claim 8
Dependent Claim
43 words
A housing for a valve actuating push rod according to claim 1, characterized in that the protective tube has an expanded cross-section at the ends thereof which are adapted to be inserted into the apertures in the crankcase or the rocker arm housing.
Claim 9
Dependent Claim
39 words
A housing for a valve actuating push rod according to claim 1, characterized in that a step, to limit the axial movement of the protective tube is provided within the apertures in the crankcase or the rocker arm housing.
Claim 10
Dependent Claim
32 words
A housing for a valve actuating push rod according to claim 1, characterized in that the common space for the O-ring, formed by the two grooves is provided at the crank-case end.
Claim 11
Dependent Claim
36 words
A housing for a valve actuating push rod according to claim 1, characterized in that the aperture in the crank-case for insertion of the protective tube is formed by a retaining element arranged on the crankcase.
Claim 12
Dependent Claim
17 words
A housing as defined in claim 1 wherein the cross-sectional shape of said groove is substantially trapezoidal.
Claim 13
Dependent Claim
17 words
A housing as defined in claim 1 wherein the cross-sectional shape of said groove is substantially rectangular.
References Cited (Backward Citations)
No citation records indexed.
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