Back to results
US 7,281,329 B2Granted
Method for fabricating a roller follower assembly
AssigneeMacLean-Fogg Company
InventorsDhruva Mandal, Carroll Williams
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method for fabricating a roller follower assembly, comprising the steps of fabricating a lash adjuster body, fabricating a roller follower body, fabricating a leakdown plunger, fabricating a socket, wherein at least one of the lash adjuster body, roller follower body, leakdown plunger, and socket is fabricated at least in part by forging.
Claims59
A method of fabricating a roller follower assembly, comprising the steps of:
- a) fabricating a roller follower body, comprising the steps of:
- i) providing a first rod;
- ii) cold forming a first roller cavity into the first rod to provide the first roller cavity with a first inner roller surface;
- iii) enclosing at least a portion of the first roller cavity within an outer roller surface;
- iv) configuring the first inner roller surface to house a roller;
- v) cold forming a second roller cavity into the first rod to provide the second roller cavity with a second inner roller surface;
- vi) enclosing at least a portion of the second roller cavity within the outer roller surface;
- vii) configuring the second inner roller surface to house a leakdown plunger;
- b) fabricating the leakdown plunger, comprising the steps of:
- i) providing a second rod;
- ii) cold forming an inner plunger surface into the second rod to provide a chamber;
- iii) cold forming a first plunger opening into the second rod;
- iv) configuring the first plunger opening to accommodate a valve insert;
- v) cold forming a second plunger opening into the second rod;
- vi) configuring the second plunger opening to cooperate with a socket;
- vii) fabricating an outer plunger surface;
- viii) configuring the outer plunger surface for insertion into the roller follower body;
- ix) enclosing at least a portion of the inner plunger surface within the outer plunger surface;
- x) configuring the inner plunger surface to define a chamber;
- c) fabricating the socket, comprising the steps of:
- i) fabricating a first socket surface;
- ii) configuring the first socket surface to accommodate a push rod;
- iii) fabricating a second socket surface;
- iv) configuring the second socket surface to cooperate with the leakdown plunger;
- v) fabricating an outer socket surface;
- vi) fabricating a passage;
- and
- d) at least one of the first roller cavity, the second roller cavity, the first plunger opening, the second plunger opening, the outer plunger surface, the inner plunger surface, the first socket surface, the second socket surface, the outer socket surface, and the passage is fabricated at least in part through forging.
25 more elements
A method of fabricating a roller follower assembly, comprising the steps of:
- a) fabricating a roller follower body, comprising the steps of:
- i) cold forming a first roller cavity;
- ii) enclosing at least a portion of the first roller cavity within an outer roller surface;
- iii) providing the first roller cavity with a first inner roller surface;
- iv) configuring the first inner roller surface to accommodate a cylindrical insert;
- v) cold forming a second roller cavity;
- vi) enclosing at least a portion of the second roller cavity within the outer roller surface;
- vii) machining, at least in part, the second roller cavity to provide a second inner roller surface;
- viii) configuring the second inner roller surface to house a leakdown plunger;
- ix) machining, at least in part, the outer roller surface to provide a generally cylindrical roller surface located adjacent to a frusto-conical roller surface;
- b) fabricating the leakdown plunger, comprising the steps of:
- i) cold forming a first plunger opening;
- ii) configuring the first plunger opening to accommodate a valve insert;
- iii) cold forming a second plunger opening;
- iv) configuring the second plunger opening to cooperate with a socket;
- v) cold forming, at least in part, an outer plunger surface;
- vi) machining, at least in part, the outer plunger surface for insertion into the roller follower body;
- vii) enclosing at least a portion of an inner plunger surface within the outer plunger surface;
- viii) configuring the inner plunger surface to define a chamber;
- c) fabricating the socket, comprising the steps of:
- i) cold forming a first socket surface;
- ii) configuring the first socket surface to cooperate with a push rod;
- iii) cold forming a second socket surface;
- iv) configuring the second socket surface to cooperate with the leakdown plunger;
- v) fabricating an outer socket surface;
- vi) configuring the outer socket surface to cooperate with the leakdown plunger;
- and
- vii) fabricating a passage.
25 more elements
A method of fabricating a roller follower assembly, comprising the steps of:
- a) fabricating a roller follower body, comprising the steps of:
- i) providing a first rod;
- ii) cold forming a roller cavity into the first rod;
- iii) enclosing at least a portion of the roller cavity within an outer roller surface;
- iv) machining, at least in part, the roller cavity to provide an inner roller surface that includes a plurality of cylindrical surfaces with a plurality of diameters;
- v) providing the first rod with an end that includes a plurality of walls;
- vi) providing the roller follower body with a transition opening that links the roller cavity with the walls;
- vii) dimensioning the walls of the roller follower body to accommodate a roller;
- viii) machining, at least in part, the outer roller surface to provide a plurality of cylindrical roller surfaces wherein at least one of the cylindrical roller surfaces is located adjacent to a frusto-conical roller surface;
- b) fabricating a leakdown plunger, comprising the steps of:
- i) providing a second rod;
- ii) cold forming a first plunger opening into the second rod;
- iii) configuring the first plunger opening to accommodate a valve insert;
- iv) cold forming a second plunger opening into the second rod;
- v) configuring the second plunger opening to cooperate with a socket;
- vi) cold forming the second rod to provide, at least in part, an outer plunger surface;
- vii) configuring the outer plunger surface for insertion into the roller follower body;
- viii) enclosing at least a portion of an inner plunger surface within the outer plunger surface;
- ix) configuring the inner plunger surface to define a chamber;
- c) fabricating the socket, comprising the steps of:
- i) providing a third rod;
- ii) cold forming a first socket surface into the third rod;
- iii) configuring the first socket surface to accommodate a push rod;
- iv) cold forming a second socket surface into the third rod;
- v) configuring the second socket surface to cooperate with the leakdown plunger;
- vi) cold forming the third rod to provide, at least in part, an outer socket surface;
- vii) configuring the outer socket surface to cooperate with the inner roller surface of the roller follower body;
- and
- viii) fabricating a passage.
26 more elements
A method of fabricating a roller follower assembly, comprising the steps of:
- a) fabricating a roller follower body, comprising the steps of:
- i) providing a forgeable material;
- ii) cold forming the forgeable material so that the forgeable material is provided with a first end and a second end;
- iii) cold forming the forgeable material, at least in part, to provide a plurality of roller walls at the first end;
- iv) cold forming the forgeable material to provide, at least in part, an outer roller surface;
- v) configuring the roller walls to accommodate a roller;
- vi) cold forming a roller cavity into the second end of the forgeable material;
- vii) enclosing at least a portion of the roller cavity within the outer roller surface;
- viii) machining, at least in part, the roller cavity to provide an inner roller surface;
- ix) configuring the inner roller surface to house a leakdown plunger;
- x) machining, at least in part, the outer roller surface to provide a cylindrical roller surface;
- b) fabricating the leakdown plunger, comprising the steps of:
- i) cold forming a first plunger opening;
- ii) configuring the first plunger opening to accommodate a valve insert;
- iii) cold forming a second plunger opening;
- iv) configuring the second plunger opening to cooperate with a socket;
- v) cold forming, at least in part, an outer plunger surface;
- vi) configuring the outer plunger surface for insertion into the inner roller surface of the roller follower body;
- vii) cold forming, at least in part, an inner plunger surface within the outer plunger surface;
- viii) configuring the inner plunger surface to define a chamber;
- c) fabricating the socket, comprising the steps of:
- i) cold forming a first socket surface;
- ii) configuring the first socket surface to cooperate with a push rod;
- iii) cold forming a second socket surface;
- iv) configuring the second socket surface to cooperate with the leakdown plunger;
- v) cold forming an outer socket surface;
- vi) configuring the outer socket surface to cooperate with the inner roller surface of the roller follower body;
- and
- vii) fabricating a passage.
26 more elements
A method of fabricating a roller follower assembly, comprising the steps of:
- a) fabricating a roller follower body, comprising the steps of:
- i) providing a first rod of forgeable material;
- ii) cold forming the first rod to provide a first end and a second end;
- iii) cold forming the first end of the first rod to provide a plurality of roller walls;
- iv) configuring the roller walls to house a roller;
- v) cold forming a roller cavity into the second end of the first rod of forgeable material;
- vi) enclosing at least a portion of the roller cavity within an outer roller surface;
- vii) machining, at least in part, the roller cavity to provide an inner roller surface;
- viii) configuring the inner roller surface to accommodate a leakdown plunger;
- b) fabricating the leakdown plunger, comprising the steps of:
- i) providing a second rod of forgeable material;
- ii) cold forming a first plunger opening into the second rod;
- iii) configuring the first plunger opening to accommodate a valve insert;
- iv) cold forming a second plunger opening into the second rod;
- v) cold forming, at least in part, an inner plunger surface into the second rod;
- vi) configuring the second plunger opening to cooperate with a socket;
- vii) fabricating an outer plunger surface;
- viii) configuring the outer plunger surface for insertion into the roller follower body;
- ix) enclosing at least a portion of the inner plunger surface within the outer plunger surface;
- x) configuring the inner plunger surface to define a chamber;
- c) fabricating the socket, comprising the steps of:
- i) providing a third rod of forgeable material;
- ii) cold forming a first socket surface into the third rod so that the first socket surface cooperates with a push rod;
- iii) cold forming a second socket surface into the third rod so that the second socket surface cooperates with the leakdown plunger;
- iv) cold forming an outer socket surface so that the outer socket surface cooperates with the inner roller surface of the roller follower body;
- v) heat treating the socket;
- and
- vi) fabricating a passage.
25 more elements
A method of fabricating a roller follower assembly, comprising the steps of:
- a) fabricating a roller follower body, comprising the steps of:
- i) providing a first rod of forgeable material;
- ii) cold forming the first rod to provide a first end and a second end;
- iii) cold forming the first end of the first rod to provide a plurality of roller walls;
- iv) configuring the roller walls to house a cylindrical insert;
- v) cold forming a roller cavity, at least in part, into the second end of the first rod of forgeable material;
- vi) enclosing at least a portion of the roller cavity within an outer roller surface;
- vii) machining, at least in part, the roller cavity to provide an inner roller surface that is configured to accommodate a leakdown plunger;
- viii) cold forming, at least in part, an undercut surface into the outer roller surface so that the undercut surface is located at the second end of the first rod;
- b) fabricating the leakdown plunger, comprising the steps of:
- i) providing a second rod of forgeable material;
- ii) cold forming a first plunger opening into the second rod;
- iii) configuring the first plunger opening to accommodate a valve insert;
- iv) cold forming a second plunger opening into the second rod;
- v) cold forming, at least in part, an inner plunger surface into the second rod;
- vi) configuring the second plunger opening to cooperate with a socket;
- vii) fabricating an outer plunger surface;
- viii) configuring the outer plunger surface for insertion into the roller follower body;
- ix) enclosing at least a portion of the inner plunger surface within the outer plunger surface;
- x) configuring the inner plunger surface to define a chamber;
- c) fabricating the socket, comprising the steps of:
- i) providing a third rod of forgeable material;
- ii) cold forming a first socket surface into the third rod so that the first socket surface cooperates with a push rod;
- iii) cold forming a second socket surface into the third rod so that the second socket surface cooperates with the leakdown plunger;
- iv) cold forming the third rod to provide an outer socket surface;
- and
- v) fabricating a passage.
24 more elements
A method of fabricating a roller follower assembly, comprising the steps of:
- a) fabricating a roller follower body, comprising the steps of:
- i) providing a first rod of forgeable material;
- ii) cold forming the first rod to provide a first end and a second end;
- iii) cold forming the first end of the first rod to provide a plurality of roller walls;
- iv) configuring the roller walls to house a roller;
- v) cold forming a roller cavity into the second end of the first rod of forgeable material;
- vi) enclosing at least a portion of the roller cavity within an outer roller surface;
- vii) machining, at least in part, the roller cavity to provide an inner roller surface;
- viii) configuring the inner roller surface to accommodate a leakdown plunger;
- ix) cold forming, at least in part, a well into the inner roller surface;
- b) fabricating the leakdown plunger, comprising the steps of:
- i) providing a second rod of forgeable material;
- ii) cold forming a first plunger opening into the second rod;
- iii) configuring the first plunger opening to accommodate a valve insert;
- iv) cold forming a second plunger opening into the second rod;
- v) cold forming, at least in part, an inner plunger surface into the second rod;
- vi) configuring the second plunger opening to cooperate with a socket;
- vii) fabricating an outer plunger surface;
- viii) configuring the outer plunger surface for insertion into the roller follower body;
- ix) enclosing at least a portion of the inner plunger surface within the outer plunger surface;
- x) configuring the inner plunger surface to define a chamber;
- c) fabricating the socket, comprising the steps of:
- i) providing a third rod of forgeable material;
- ii) cold forming a first socket surface into the third rod so that the first socket surface cooperates with a push rod;
- iii) cold forming a second socket surface into the third rod so that the second socket surface cooperates with the leakdown plunger;
- iv) cold forming an outer socket surface so that the outer socket surface cooperates with the inner roller surface of the roller follower body;
- and
- v) fabricating a passage.
25 more elements
A method of fabricating a roller follower assembly, comprising the steps of:
- a) fabricating a roller follower body, comprising the steps of:
- i) providing a first rod of forgeable material;
- ii) cold forming the first rod to provide a first end and a second end;
- iii) cold forming the first end of the first rod to provide a plurality of roller walls so that the roller walls accommodate a roller;
- iv) cold forming a roller cavity into the second end of the first rod of forgeable material;
- v) enclosing at least a portion of the roller cavity within an outer roller surface;
- vi) machining, at least in part, the roller cavity to provide an inner roller surface;
- vii) configuring the inner roller surface to accommodate a leakdown plunger;
- viii) cold forming, at least in part, a well into the inner roller surface
- ix) cold forming, at least in part, an undercut surface into the outer roller surface so that the undercut surface is located at the second end of the first rod;
- b) fabricating the leakdown plunger, comprising the steps of:
- i) providing a second rod of forgeable material;
- ii) cold forming a first plunger opening into the second rod;
- iii) configuring the first plunger opening to accommodate a valve insert;
- iv) cold forming a second plunger opening into the second rod;
- v) cold forming, at least in part, an inner plunger surface into the second rod;
- vi) configuring the second plunger opening to cooperate with a socket;
- vii) fabricating an outer plunger surface;
- viii) configuring the outer plunger surface for insertion into the roller follower body;
- ix) enclosing at least a portion of the inner plunger surface within the outer plunger surface;
- x) configuring the inner plunger surface to define a chamber;
- c) fabricating the socket, comprising the steps of:
- i) providing a third rod of forgeable material;
- ii) cold forming a first socket surface into the third rod so that the first socket surface cooperates with a push rod;
- iii) cold forming a second socket surface into the third rod so that the second socket surface cooperates with the leakdown plunger;
- iv) cold forming an outer socket surface so that the outer socket surface cooperates with the inner roller surface of the roller follower body;
- and
- v) fabricating a passage.
25 more elements
A method for manufacturing an assembly that includes a socket body, a leakdown plunger, and a roller follower body, comprising the steps of:
- a) providing the socket body that has, at least in part, been cold formed to include a first socket surface, an outer socket surface, and a second socket surface;
- b) providing the leakdown plunger that has, at least in part, been cold formed to include a first annular plunger surface located at a first end of the leakdown plunger, an inner plunger surface provided with a cylindrical plunger surface that abuts an inner conical plunger surface;
- c) providing the roller follower body that has, at least in part, been cold formed to include:
- i) a plurality of roller walls that are configured to accommodate a roller;
- ii) a second roller cavity that is provided with a second roller surface and a second roller opening wherein a second inner roller surface is provided with a plurality of cylindrical surfaces and configured to accommodate the socket body and the leakdown plunger;
- and
- d) assembling the socket body and the leakdown plunger within the roller follower body so that the socket body and the leakdown plunger are located at least in part within the second roller cavity and the second socket surface of the socket body faces the a second annular plunger surface.
4 more elements
A method for manufacturing an assembly that includes a socket body, a leakdown plunger, and a roller follower body, comprising the steps of:
- a) providing the socket body that has been cold formed to include a first socket surface, an outer socket surface, and a second socket surface, wherein the first socket surface defines a hole;
- b) providing the leakdown plunger that has been cold formed to include a first annular plunger surface and a second annular plunger surface wherein the first annular plunger surface defines a plunger hole located at a first end of the leakdown plunger, an inner plunger surface with an inner cylindrical plunger surface that abuts an inner conical plunger surface;
- c) providing the roller follower body that has been cold formed to include a plurality of walls that accommodate a roller and cold formed and machined to include a roller cavity that is provided with a roller surface and a roller opening wherein an inner roller surface is provided with a plurality of cylindrical surfaces and configured to accommodate the socket body and the leakdown plunger;
- and
- d) assembling the socket body and the leakdown plunger within the roller follower body so that the socket body and the leakdown plunger are located at least in part within the second roller cavity and the second socket surface of the socket body faces a second annular plunger surface.
2 more elements
Dependencies are inferred from the claim text.