Patent US3759316A successfully refreshed from Google Patents.
US3759316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ingot mold separator
Assignee: Individual
•
Filing: 1972-04-03
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Granted: 1973-09-18
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Expires: 1992-04-03
Abstract
Abstract This specification discloses a device for separating an ingot from a mold in which it is stuck and which operates on the principle of raising the ingot and mold as a unit from a supporting surface a predetermined distance and then letting the unit fall. The drop of the ingot is interrupted before the unit reaches the supporting surface, while the downward movement of the mold is continued under the momentum generated by the fall, to separate the ingot from the mold.
Inventors
- 👤 G Saarup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:47
CPC Classifications
B; B22; B22D; B22D29/00; B22D29/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
180 words
An apparatus for separating an ingot from a mold in which it is stuck by the use of a hoist, said apparatus comprising: a. an upper frame having hoist engaging means; b. a lower frame movable in said upper frame; c. a spring normally maintaining said frames in assembled relation; d. a plunger in said lower frame; e. return spring means normally retracting said plunger in said lower frame; f. ingot engaging means carried by said plunger; g. a pair of arms pivotally mounted on said lower frame and including inwardly and outwardly extending portions, said outwardly extending portions being engageable by said upper frame to hold the arms against pivotal movement, said inwardly projecting portions being engaged by said plunger; h. a dash pot connected to each of said arms for retarding pivotal movement thereof, said dash pots being mounted on said lower frame, and i. a chain having one end connected to said upper frame and its other end to said plunger, said chain being slack when said plunger is in a retracted position in said lower frame.
Claim 2
Independent Claim
180 words
An apparatus for separating an ingot from a mold in which it is stuck by the use of a hoist, said apparatus comprising: a. an upper frame having hoist engaging means; b. a lower frame movable in said upper frame; c. a spring normally maintaining said frames in assembled relation; d. a plunger in said lower frame; e. return spring means normally retracting said plunger in said lower frame; f. ingot engaging means carried by said plunger; g. a pair of arms pivotally mounted on said lower frame and including inwardly and outwardly extending portions, said outwardly extending portions being engageable by said upper frame to hold the arms against pivotal movement, said inwardly projecting portions being engaged by said plunger; h. a dash pot connected to each of said arms for retarding pivotal movement thereof, said dash pots being mounted on said lower frame, and i. a chain having one end connected to said upper frame and its other end to said plunger, said chain being slack when said plunger is in a retracted position in said lower frame.
Claim 3
Dependent Claim
25 words
The apparatus of claim 1 in which said plunger includes a shank and a head presenting flanges which engage the inner ends of said arms.
Claim 4
Dependent Claim
35 words
The apparatus of claim 1 in which said upper frame includes vertical members together with a pair of spring biased tabs pivotally mounted on the ends of said vertical members and normally in alignment therewith.
Claim 5
Dependent Claim
47 words
The apparatus of claim 1 in which each of said arms includes a main body portion and an inner end portion pivotally mounted on said main body portion, together with abutment means for limiting relative pivotal movement between said main body portion and said inner end portion.
Claim 6
Dependent Claim
34 words
The apparatus of claim 1 in which the spring of element c) is a heavy coiled spring having its upper end anchored to said upper frame and its lower end to said lower frame.
Claim 7
Dependent Claim
27 words
The apparatus of claim 1 in which said lower frame includes a top wall formed with a central opening and said chain passes throuGh said central opening.
Claim 8
Dependent Claim
43 words
The apparatus of claim 1 in which said return spring means comprises a pair of expansion coil springs each having an upper end connected to said lower frame with the lower end of each spring connected to the upper end of said plunger.
Claim 9
Dependent Claim
61 words
The apparatus of claim 1 in which each of the dash pots includes a cylinder containing an hydraulic medium, a piston slidable in said cylinder and formed with an opening, and a valve mounted on said piston in said opening which offers greater resistance to flow of the hydraulic medium through said opening in one direction, then in the opposite direction.
Claim 10
Dependent Claim
23 words
The apparatus of claim 8 in which said valve is adjustable to vary the resistance to flow of said medium in one direction.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |