US4074834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting head with toggle lever actuated valve
Assignee: Individual
•
Filing: 1976-09-29
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Granted: 1978-02-21
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Expires: 1996-09-29
Abstract
Abstract A casting head for cooperation with a mold in which hardenable synthetic resins can be cast under a high temperature, comprising: a stationary and a respectively movable head part; at least one hydraulic cylinder in the stationary head part to change the relative position of a portion of the movable part, between a closed rest position and a casting position, in which latter a passage of the casting head is open to feed the resin to an inlet opening of the mold; the movable head part includes a housing with bottom and top parts; at least one toggle lever is slidably journaled and pivotable in the bottom housing part while the movable head part has therein a lengthwise movable closure rod, the outer end of the latter carrying a closure head which acts on the passage to open and close the same; and spring means for closing the passage when the pressure applied to the cylinder has been released, the spring means being compressed by way of the closure rod and the closure head when the passage is being opened. Among other optional features, a removable casting nozzle is suggested which has a low heat conductivity.
Inventors
- 👤 Alois Joseph Suter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:47
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/20; B29C45/23; B29C45/231
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
241 words
A casting head for cooperation with a mold in which hardenable synthetic resins can be cast under a high temperature, the mold having an inlet for the resins, the head comprising: a stationary part (1) and a part (2) movable with respect to said stationary part; at least one hydraulic cylinder (4, 5, 6) in said stationary part to change the relative position of a portion of said movable part with respect to said stationary part, between a closed rest position and a casting position, said cylinder having a double-acting piston rod (7) connected with said movable part; a housing in said movable part with bottom (9) and top (10) parts; said top housing part having therein an opening passage (19) for the resins, that leads toward the inlet of the mold, and an outlet opening (21) for the resins, which latter opening can be brought into close contact with the inlet of the mold; at least one toggle lever (14, 15) movably journaled within and pivotable in said bottom housing part; a lengthwise movable closure rod (17) in said movable part; a closure head (18) carried by the outer end of said closure rod, acting on said opening passage which is open in the casting position and leads to said outlet opening; and spring means (25) for biasing said closure rod and said closure head for closing said opening passage when the pressure applied to said cylinder has been released.
Claim 2
Dependent Claim
241 words
A casting head for cooperation with a mold in which hardenable synthetic resins can be cast under a high temperature, the mold having an inlet for the resins, the head comprising: a stationary part (1) and a part (2) movable with respect to said stationary part; at least one hydraulic cylinder (4, 5, 6) in said stationary part to change the relative position of a portion of said movable part with respect to said stationary part, between a closed rest position and a casting position, said cylinder having a double-acting piston rod (7) connected with said movable part; a housing in said movable part with bottom (9) and top (10) parts; said top housing part having therein an opening passage (19) for the resins, that leads toward the inlet of the mold, and an outlet opening (21) for the resins, which latter opening can be brought into close contact with the inlet of the mold; at least one toggle lever (14, 15) movably journaled within and pivotable in said bottom housing part; a lengthwise movable closure rod (17) in said movable part; a closure head (18) carried by the outer end of said closure rod, acting on said opening passage which is open in the casting position and leads to said outlet opening; and spring means (25) for biasing said closure rod and said closure head for closing said opening passage when the pressure applied to said cylinder has been released.
Claim 3
Dependent Claim
41 words
The casting head as defined in claim 1, further comprising means for regulating the amount of the synthetic resin being fed to the mold through said opening passage (19) by actuating an adjusting member (40) forming part of said regulating means.
Claim 4
Dependent Claim
66 words
The casting head as defined in claim 1, further comprising an adjusting ring (27) between said bottom housing part (9) and said at least one toggle lever (14, 15) for pivoting said at least one toggle lever, there being at least one supporting curve (30) on said adjusting ring, one for each said toggle lever, and means for manually moving said at least one toggle lever.
Claim 5
Dependent Claim
37 words
The casting head as defined in claim 1, further comprising an adjusting ring (27) disposed between said bottom housing part (9) and said at least one toggle lever (14, 15) for controlling the position of the latter.
Claim 6
Dependent Claim
28 words
The casting head as defined in claim 1, further comprising a removable guide bushing (16) in said top housing part (10) for receiving said closure rod (17) therein.
Claim 7
Dependent Claim
40 words
The casting head as defined in claim 1, further comprising a removable casting nozzle (20) between said opening passage (19) and the inlet opening of the mold, said nozzle having a heat conductivity that is lower than that of steel.
Claim 8
Dependent Claim
44 words
The casting head as defined in claim 1, further comprising a spring member (8) connecting said movable part (2) with said piston rod (7) of said stationary part (1), said spring member being disposed between said piston rod and said bottom housing part (9).
Claim 9
Dependent Claim
49 words
The casting head as defined in claim 7, further comprising a support washer (36) adjoining said spring member (8) on the side of said stationary part (1), the side of said washer that faces said spring member and said bottom housing part (9) having a conically outwardly tapering configuration.
Claim 10
Dependent Claim
49 words
The casting head as defined in claim 1, further comprising an insert (11, 11a) partly within said bottom housing part (9) for connecting the latter with said top housing part (10), said at least one toggle lever (14, 15) being journaled in and pivotable with respect to said insert.
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) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |