US3593551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrohydraulic transducers
Assignee: Continental Can Co Inc
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Filing: 1968-09-25
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Granted: 1971-07-20
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Expires: 1988-09-25
Abstract
Abstract This disclosure relates to electrohydraulic transducers of the type where electrical energy is discharged across a gap between a pair of electrodes to create a shock wave which expands a flexible chamber to urge a tubular workpiece telescopically externally thereof into conformity with a mold cavity, and includes an internal cage structure for supporting the chamber and at least one of the electrodes, and means for clamping the tubular workpiece at a predetermined position relative to the cavity prior to a forming operation.
Inventors
- 👤 Donald J Roth
- 👤 Carl A Pesce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:00
CPC Classifications
B; B21; B21D; B21D26/00; B21D26/02; B21D26/06; B21D26/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
202 words
An electrohydraulic transducer comprising flexible chamber means about which a tubular element is adapted to be exteriorly telescopically positioned, means for introducing a fluid medium into said chamber means, means for supporting a pair of electrodes in said chamber means whereby upon the discharge of electrical energy across said electrodes the resultant electrohydraulic effect produces a momentary hydraulic shock wave which expands said chamber means and forces said tubular element radially outwardly thereby reforming the initial configuration thereof, clamping surface means interiorly contacting a free peripheral edge portion of the tubular element, clamping surface means exteriorly contacting said free peripheral edge portion, means for relatively moving said clamping surface means toward each other to clamp the free peripheral edge portion of the tubular element therebetween thereby clampingly positioning the tubular element at a predetermined position relative to said chamber means, relatively rigid cage structure means disposed partially interiorly of said chamber means, a fluid cylinder carried by said cage structure means, a piston of said fluid cylinder having a surface portion defiNing said interior clamping surface means, and means for introducing fluid into said fluid cylinder for moving said piston between clamping and unclamping positions relative to said exterior clamping surface means.
Claim 2
Dependent Claim
202 words
An electrohydraulic transducer comprising flexible chamber means about which a tubular element is adapted to be exteriorly telescopically positioned, means for introducing a fluid medium into said chamber means, means for supporting a pair of electrodes in said chamber means whereby upon the discharge of electrical energy across said electrodes the resultant electrohydraulic effect produces a momentary hydraulic shock wave which expands said chamber means and forces said tubular element radially outwardly thereby reforming the initial configuration thereof, clamping surface means interiorly contacting a free peripheral edge portion of the tubular element, clamping surface means exteriorly contacting said free peripheral edge portion, means for relatively moving said clamping surface means toward each other to clamp the free peripheral edge portion of the tubular element therebetween thereby clampingly positioning the tubular element at a predetermined position relative to said chamber means, relatively rigid cage structure means disposed partially interiorly of said chamber means, a fluid cylinder carried by said cage structure means, a piston of said fluid cylinder having a surface portion defiNing said interior clamping surface means, and means for introducing fluid into said fluid cylinder for moving said piston between clamping and unclamping positions relative to said exterior clamping surface means.
Claim 3
Dependent Claim
26 words
The electrohydraulic transducer as defined in claim 1 wherein said piston is of an annular configuration and is in exterior telescopic relationship to said chamber means.
Claim 4
Dependent Claim
48 words
The electrohydraulic transducer as defined in claim 2 wherein said chamber means is a flexible baglike element having a closed end, one of said pair of members is supported at said closed end by said supporting means, and one of said electrodes is carried by said one member.
Claim 5
Dependent Claim
75 words
An electrohydraulic transducer comprising flexible chamber means about which a tubular element is adapted to be exteriorly telescopically positioned, means for introducing a fluid medium into said chamber means, means other than said flexible chamber means for clamping the tubular element at a predetermined position relative to said chamber means, and means for increasing the force of said clamping means in proportion to an increase in pressure of said fluid means in said chamber means.
Claim 6
Dependent Claim
75 words
An electrohydraulic transducer comprising flexible chamber means about which a tubular element is adapted to be exteriorly telescopically positioned, means for introducing a fluid medium into said chamber means, means other than said flexible chamber means for clamping the tubular element at a predetermined position relative to said chamber means, and means for increasing the force of said clamping means in proportion to an increase in pressure of said fluid means in said chamber means.
Claim 7
Dependent Claim
57 words
The electrohydraulic transducer as defined in claim 4 including means for supporting a pair of electrodes in said chamber means whereby upon the discharge of electrical energy across said electrodes the resultant electrohydraulic effect produces a momentary shock wave which expands said chamber means and forces said tubular element radially outwardly thereby reforming the initial configuration thereof.
Claim 8
Dependent Claim
38 words
The electrohydraulic transducer as defined in claim 4 wherein said clamping means includes piston means exteriorly of said chamber means, and said force-increasing means is a fluid circuit placing said piston in fluid communication with said chamber means.
Claim 9
Dependent Claim
70 words
The electrohydraulic transducer as defined in claim 4 wherein said clamping means includes a piston axially movable in a fluid cylinder, said piston having a surface portion defining a surface for clamping against a free inner peripheral surface of said tubular element, and said force-increasing means includes means for introducing fluid into said fluid cylinder for moving said piston between clamping and unclamping positions relative to an exterior clamping surface.
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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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |