US3743815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for producing valves as for internal-combustion engines
Assignee: Stoody Co
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Filing: 1972-10-06
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Granted: 1973-07-03
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Expires: 1992-10-06
Abstract
Abstract A system is disclosed for use in the production of valves that include a disk or head which is integral with an axiallyextending shank or stem. As disclosed herein, a form or blank of such a valve initially is provided (as by various metal-forming techniques) with an annular groove at the peripheral edge of the head. The valve form is then placed in a chuck to provide electrical contact with substantially the entire periphery of the valve head thereby affording a locus of short paths for heat flow and an arc-welding electrical current. In accordance herewith, the valve is then rotated in relation to an arc-welding apparatus to accomplish an annulus of hard metal in the groove of the valve form. Finally, the valve form is finished by smoothing the deposited annulus to provide a seating surface that will matingly engage an engine port to accomplish closure.
Inventors
- 👤 M Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:57
CPC Classifications
B; B23; B23K; B23K31/00; B23K31/02; B23K31/025; B23K9/00; B23K9/04; B23K9/044; B23K9/046; B23P; B23P15/00; B23P15/001; B23P15/002
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
94 words
A system for producing a valve, as for an internal-combustion engine, which valve includes a disk section, the periphery of which abuts an annular seating surface, comprising: a chuck means for receiving said valve and defining a closure to matingly engage said periphery of said valve; an arc welding means foR depositing metal, and including a circuit connected through said chuck means; and means for revolving said chuck means in relation to said welding means during an operating interval of said arc welding means to deposit an annulus of metal at said seating surface.
Claim 2
Independent Claim
94 words
A system for producing a valve, as for an internal-combustion engine, which valve includes a disk section, the periphery of which abuts an annular seating surface, comprising: a chuck means for receiving said valve and defining a closure to matingly engage said periphery of said valve; an arc welding means foR depositing metal, and including a circuit connected through said chuck means; and means for revolving said chuck means in relation to said welding means during an operating interval of said arc welding means to deposit an annulus of metal at said seating surface.
Claim 3
Dependent Claim
30 words
A system according to claim 1 wherein said chuck means includes a plurality of separable segments mating to define substantially complete contact with said periphery of said valve on closure.
Claim 4
Dependent Claim
12 words
A system according to claim 2 wherein said chuck means comprises copper.
Claim 5
Dependent Claim
27 words
A system according to claim 2 wherein said chuck means defines an annular shoulder for abuttingly engaging the flat surface of the disk section of said valve.
Claim 6
Dependent Claim
22 words
A system according to claim 2 wherein said chuck means includes an actuator means for concurrently moving said segments in radial directions.
Claim 7
Dependent Claim
32 words
A system according to claim 2 wherein said means for revolving comprises a rotary drive unit to turn said chuck means through a motion pattern of between one revolution and two revolutions.
Claim 8
Independent Claim
97 words
A method of producing a valve, as for use in an internal-combustion engine, comprising the steps of: providing a valve form including a stem and a head, said head defining an annular groove at the periphery thereof; supporting said valve form by matingly engaging said head at the periphery thereof, to provide effective electrical contact about said periphery; establishing an arc-welding current path through an electrode and said valve form, as supported; employing said current path to deposit an annulus of metal on said annular groove; and finishing said valve including smoothing said annulus of deposited metal.
Claim 9
Independent Claim
97 words
A method of producing a valve, as for use in an internal-combustion engine, comprising the steps of: providing a valve form including a stem and a head, said head defining an annular groove at the periphery thereof; supporting said valve form by matingly engaging said head at the periphery thereof, to provide effective electrical contact about said periphery; establishing an arc-welding current path through an electrode and said valve form, as supported; employing said current path to deposit an annulus of metal on said annular groove; and finishing said valve including smoothing said annulus of deposited metal.
Claim 10
Dependent Claim
24 words
A method according to claim 7 wherein said valve is rotated about the central axis thereof during the deposition of said annulus of metal.
Claim 11
Dependent Claim
40 words
A method according to claim 8 wherein said annulus of metal is provided by rotating said valve through an angle of more than a single revolution whereby to diminish the weld puddle size progressively on completion of said single revolution.
Claim 12
Dependent Claim
36 words
A method according to claim 8 wherein said annulus of metal is provided by an overlapping, annular arc welding pattern and whereby said annulus is terminated by a decreasing current through an angle of several degrees.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |