US3758245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic press for compression of powder
Assignee: Mannesmann Meer AG
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Filing: 1971-07-01
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Granted: 1973-09-11
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Expires: 1991-07-01
Abstract
Abstract Hydraulic press for compression of powder having upper punch, lower punch and die; die and upper punch operated by pistons respectively in two cylinders, there being hydraulic conduit means interconnecting the two cylinders for operating the die moving piston in dependency upon upper punch movement. A valve is connected to the conduit means and controlls a hydraulic bleeder path. The valve is actuated by means connected to be responsive to the relative positions of the first and second pistons, to control the characteristics of that defining the dependency of die movement upon movement of the upper punch.
Inventors
- 👤 R Hermes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:06
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/02; B22F3/03; B30; B30B; B30B11/00; B30B11/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
175 words
Hydraulic press for compression of powder having upper punch, lower punch and die, a first and second one of these three elements being movable relative to each other for press operation, the relative motion being provided by means of first and second pistons respectively connected to these first and second elements and respectively moving in first and second cylinders, there being hydraulic conduit means interconnecting the two cylinders, the improvement comprising: a branch conduit means conductively connected to for tapping the said conduit means and leading to a venting outlet; a valve means inserted in the branch conduit means for opening, closing or throttling a hydraulic bleeder path from the conduit means to the venting outlet; actuation means connected for operating the valve to obtain said opening, closing or throttling of the valve means; and connection means connected to be responsive to the relative positions of the first and second pistons, further connected to the actuation means for operating the actuation means in dependence upon a particular characteristic as between the relative positions during comprEssion.
Claim 2
Dependent Claim
175 words
Hydraulic press for compression of powder having upper punch, lower punch and die, a first and second one of these three elements being movable relative to each other for press operation, the relative motion being provided by means of first and second pistons respectively connected to these first and second elements and respectively moving in first and second cylinders, there being hydraulic conduit means interconnecting the two cylinders, the improvement comprising: a branch conduit means conductively connected to for tapping the said conduit means and leading to a venting outlet; a valve means inserted in the branch conduit means for opening, closing or throttling a hydraulic bleeder path from the conduit means to the venting outlet; actuation means connected for operating the valve to obtain said opening, closing or throttling of the valve means; and connection means connected to be responsive to the relative positions of the first and second pistons, further connected to the actuation means for operating the actuation means in dependence upon a particular characteristic as between the relative positions during comprEssion.
Claim 3
Dependent Claim
78 words
Hydraulic press as in claim 1, the connecting means comprising a first lever; means for pivotally linking the first lever to the first piston, the first lever having an arm, the arm being linked to the actuation means; a second lever; means for pivotally linking the second lever to a stationary part of the press and coupled to the first lever for transmitting displacement motion thereto; and means connected to the second piston for pivoting the second lever.
Claim 4
Dependent Claim
34 words
Hydraulic press as in claim 2, the coupling of the first to the second lever being externally adjustable for determining the onset of transmission of displacement motion by the first piston upon the actuator.
Claim 5
Dependent Claim
35 words
Hydraulic press as in claim 2, the pivot point of the second lever adjustable to be effective transverse to the direction of displacement of the upper punch upon the second lever as pivot motion thereof.
Claim 6
Dependent Claim
44 words
Hydraulic press as in claim 1, the second piston operating the die and having an arm, the valve being mounted on said arm, the first piston operating the upper punch, the valve actuation; means being linked by the connection means to the first piston.
Claim 7
Dependent Claim
88 words
Hydraulic press as in claim 5, the connection means comprising, a first lever pivotally linked to said arm; an adjustable feeler on the first lever; a second lever pivotally linked to a stationary part of the press and engaging the feeler; a second feeler on the second arm; and means for engaging the second feeler and coupled to the first piston, for transmitting displacement of the upper punch to the second feeler for further transmission via the second arm, the first feeler, the first lever, and the actuator.
Claim 8
Dependent Claim
61 words
Hydraulic press as in claim 6, the last means including a straightedge, displaced with the first piston in direction transverse to its extension, the pivot of the second lever adjustable in the direction of extension of the straightedge, to change the distance between the point of engagement of the second feeler and the straightedge, and the pivot of the second lever.
Claim 9
Dependent Claim
32 words
Hydraulic press as in claim 1, the connection means adjustable to determine the onset of closing the valve in the bleeder path for timing the beginning of dependent displacement of the die.
Claim 10
Dependent Claim
29 words
Hydraulic press as in claim 1, the connection means adjustable to determine the slope of the transition between independency and dependency of relative movement of first and second pistons.
Claim 11
Dependent Claim
52 words
Hydraulic Press as in claim 1, the connecting means comprising adjustable lever means respectively connecting the actuation means to the first and second piston, the said particular characteristic providing for venting through the value means so that the speeds of the pistons have a predetermined ratio as adjusted in the lever means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |