Patent US4098499A successfully refreshed from Google Patents.
US4098499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum casting heads and clamps
Assignee: Stoody Co
•
Filing: 1977-08-01
•
Granted: 1978-07-04
•
Expires: 1997-08-01
Abstract
Abstract A casting head and clamp arrangement for vacuum aspiration casting of metal rods in glass tubes is provided having a casting head with a generally vertical vacuum passage, a removable fluid pressure chuck in the lower end of said vacuum passage adapted to receive and hold the end of a glass tube, said chuck including a pair of spaced annular support discs, spaced elongate members connecting said support discs, sleeve members having an internal diameter larger than a glass tube to be held fixed on each of support disc annulus and projecting beyond said discs between the elongate members, an elastomer tube fixed at its opposite ends to the sleeve members and having an internal diameter larger than the diameter of the glass tube to be held and fluid pressure means acting between said discs to cause the elastomer tube to decrease in effective internal diameter under pressure to engage and hold the glass tube ends and to release the tube ends when the fluid pressure is released.
Inventors
- 👤 H. Joseph Klein
- 👤 William C. Hord
- 👤 James C. Ailor
- 👤 Sankar P. Iyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:33
CPC Classifications
B; B22; B22D; B22D18/00; B22D18/06; B23; B23K; B23K35/00; B23K35/40; F; F16; F16L; F16L37/00; F16L37/02; F16L37/04; F16L37/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
165 words
A casting head and clamp arrangement for vacuum aspiration casting of metal rods in glass tubes comprising a casting head having a generally vertical vacuum passage, a removable fluid pressure chuck in the lower end of said vacuum passage adapted to receive and hold the end of a glass tube, said chuck including a pair of spaced annular support discs, spaced elongate members connecting said support discs, sleeve members having an internal diameter larger than a glass tube to be held fixed on each of support disc annulus and projecting beyond said discs between the elongate members, an elastomer tube fixed at its opposite ends to the sleeve members and having an internal diameter larger than the diameter of the glass tube to be held and fluid pressure means acting between said discs to cause the elastomer tube to decrease in internal diameter under pressure to engage and hold the glass tube ends and to release the tube ends when the fluid pressure is released.
Claim 2
Dependent Claim
165 words
A casting head and clamp arrangement for vacuum aspiration casting of metal rods in glass tubes comprising a casting head having a generally vertical vacuum passage, a removable fluid pressure chuck in the lower end of said vacuum passage adapted to receive and hold the end of a glass tube, said chuck including a pair of spaced annular support discs, spaced elongate members connecting said support discs, sleeve members having an internal diameter larger than a glass tube to be held fixed on each of support disc annulus and projecting beyond said discs between the elongate members, an elastomer tube fixed at its opposite ends to the sleeve members and having an internal diameter larger than the diameter of the glass tube to be held and fluid pressure means acting between said discs to cause the elastomer tube to decrease in internal diameter under pressure to engage and hold the glass tube ends and to release the tube ends when the fluid pressure is released.
Claim 3
Dependent Claim
19 words
A casting head and clamp arrangement as claimed in claim 1 wherein the elastomer tube is of surgical rubber.
Claim 4
Dependent Claim
22 words
A casting head and clamp arrangement as claimed in claim 1 wherein the elastomer tube is tension free between the two sleeves.
Claim 5
Dependent Claim
39 words
A casting head and clamp arrangement as claimed in claim 1 wherein the support discs are provided with circumferential grooves, having an O-ring seal engaging the wall of the vertical vacuum passage to seal the area between said discs.
Claim 6
Dependent Claim
37 words
A casting head and clamp arrangement as claimed in claim 1 wherein the lowermost disc has stop means abutting the lower end of the casting head to hold the chuck against being drawn into the vacuum passage.
Claim 7
Dependent Claim
19 words
A casting head and clamp arrangement as claimed in claim 5 wherein the stop means is a radial flange.
Claim 8
Dependent Claim
128 words
A fluid pressure clutch mechanism for holding the end of a glass tube or the like tubular object comprising a pair of spaced annular support discs, spaced elongated members connecting said discs, sleeve members having an internal diameter larger than a glass tube to be held fixed on each support disc members and projecting beyond said discs between the elongate members, an elastomer tube fixed at its opposite ends to the sleeve members and having an internal diameter larger than the diameter of the glass tube to be held and fluid pressure means acting between said discs to cause the elastomer tube to decrease in internal diameter under pressure to engage and hold the glass tube ends and when the pressure is released to release said glass ends.
Claim 9
Dependent Claim
128 words
A fluid pressure clutch mechanism for holding the end of a glass tube or the like tubular object comprising a pair of spaced annular support discs, spaced elongated members connecting said discs, sleeve members having an internal diameter larger than a glass tube to be held fixed on each support disc members and projecting beyond said discs between the elongate members, an elastomer tube fixed at its opposite ends to the sleeve members and having an internal diameter larger than the diameter of the glass tube to be held and fluid pressure means acting between said discs to cause the elastomer tube to decrease in internal diameter under pressure to engage and hold the glass tube ends and when the pressure is released to release said glass ends.
Claim 10
Dependent Claim
17 words
A fluid pressure clutch mechanism as claimed in claim 7 wherein the elastomer tube is surgical rubber.
Claim 11
Dependent Claim
21 words
A fluid pressure clutch mechanism as claimed in claim 7 wherein the elastomer tube is tension free between the two sleeves.
Claim 12
Dependent Claim
29 words
A fluid pressure clutch mechanism as claimed in claim 7 wherein the sleeve means are integral with the support discs and each sleeve means has a radial holding ring.
References Cited (Backward Citations)
DE1125836B
Cited
US3844546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |