Patent US4690198A successfully refreshed from Google Patents.
US4690198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injector for injecting molten material into a die
Assignee: Castech Enterprises Inc
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Filing: 1985-09-27
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Granted: 1987-09-01
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Expires: 2005-09-27
Abstract
Abstract An injector of the piston type for a die casting machine is disclosed having means for ejecting molten material mixed with a minimal volume of air and means for compensating for thermal expansion such that the pressure applied between the nozzle of the injector and the gate of a die is substantially constant as the injector heats up.
Inventors
- 👤 Donald H. Hardey
- 👤 Franklin D. Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:05
CPC Classifications
B; B22; B22D; B22D17/00; B22D17/20; B22D17/2015; B22D17/203
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
161 words
In an injector of the piston type for a die casting machine including a gooseneck with a cylinder well adjacent its lower end, said cylinder well connected at its outlet by a delivery tube to a nozzle adjacent the upper end of the gooseneck for injecting molten material into the gate of a die, an inlet communicating the cylinder well with molten material in which the lower end of the gooseneck is dipped and a plunger which is reciprocated in the cylinder well, the improvement wherein the gooseneck is mounted on a slide between a pair of side mounts joined at one end by a block forming a rigid support and a toggle linkage against which the slide is held under compressive force by the toggle linkage and wherein a means for compensating for thermal expansion which maintains a substantially constant compressive force on the nozzle in the gate of the die is provided between the toggle linkage and the block.
Claim 2
Dependent Claim
161 words
In an injector of the piston type for a die casting machine including a gooseneck with a cylinder well adjacent its lower end, said cylinder well connected at its outlet by a delivery tube to a nozzle adjacent the upper end of the gooseneck for injecting molten material into the gate of a die, an inlet communicating the cylinder well with molten material in which the lower end of the gooseneck is dipped and a plunger which is reciprocated in the cylinder well, the improvement wherein the gooseneck is mounted on a slide between a pair of side mounts joined at one end by a block forming a rigid support and a toggle linkage against which the slide is held under compressive force by the toggle linkage and wherein a means for compensating for thermal expansion which maintains a substantially constant compressive force on the nozzle in the gate of the die is provided between the toggle linkage and the block.
Claim 3
Dependent Claim
18 words
The injector of claim 1 where a check valve is provided in the outlet of the cylinder well.
Claim 4
Dependent Claim
14 words
The injector of claim 2 wherein the check valve is located below the inlet.
Claim 5
Dependent Claim
27 words
The injector of claim 3 wherein the check valve is confined in a pocket inclined towards the outlet and formed in a portion of the delivery tube.
Claim 6
Dependent Claim
24 words
The injector of claim 3 wherein a heater is provided in the gooseneck to maintain material in the delivery tube in a molten condition.
Claim 7
Dependent Claim
17 words
The injector of claim 1 wherein the means for compensating for thermal expansion are resilient biasing means.
Claim 8
Dependent Claim
29 words
The injector of claim 6 wherein the resilient biasing means may be adjustably biased whereby the force with which the nozzle is held in the gate may be selected.
Claim 9
Dependent Claim
25 words
The injector of claim 1 wherein a cylinder for reciprocating the plunger is mounted on the slide on a supporting structure positioned above the gooseneck.
Claim 10
Dependent Claim
34 words
The injector of claim 8 wherein the supporting structure is mounted to the slide on pivots for movement away from the gooseneck so that the gooseneck may be accessed on the slide for removal.
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) | 1990-08-31 | 1991-03-02 | 1991-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-31 | 1995-03-02 | 1995-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-31 | 1999-03-02 | 1999-09-01 | $7700.00 | Window Closed / Lapsed |