US5673591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric cylinder
Assignee: Sintokogio Ltd
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Filing: 1995-10-18
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Granted: 1997-10-07
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Expires: 2015-10-18
Abstract
Abstract An electric cylinder to reduce shock and damage to itself and a body to be transferred. The electric cylinder includes a rod head having a flange mounted on the distal end of a hollow piston rod, a circular polyurethane rubber plate mounted on a circular front surface of the flange, and a protection plate mounted on the front surface of the polyurethane rubber plate.
Inventors
- 👤 Kunimasa Kimura
- 👤 Shigehiro Toyoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:04
CPC Classifications
B; B22; B22C; B22C25/00; F; F16; F16H; F16H25/00; F16H25/18; F16H25/20; B65; B65G; B65G47/00; B65G47/74; B65G47/82; F16F; F16F1/00; F16F1/36; F16F1/42; F16F1/44; F16F2236/00; F16F2236/04; F16H2025/2037; F16H25/22; F16H25/2204; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18672
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
138 words
An electric cylinder for pushing and receiving a container filled with molten metal, comprising: a piston attached to a nut threaded with a ball screw; driving means for rotating said ball screw clockwise and counterclockwise; a hollow piston rod attached to said piston; a supporting member mounted on a distal end of said screw such that said hollow piston rod can slide on said member; and a rod head mounted on a distal end of said hollow rod, wherein said rod head includes: a flange attached to a distal end of said piston rod, said flange having a circular front surface; a circular polyurethane rubber plate mounted on said circular surface of said flange; and a protection plate mounted on a front surface of said polyurethane rubber plate, said protection plate having a heat conductivity of 3-50 W/mk.
Claim 2
Dependent Claim
138 words
An electric cylinder for pushing and receiving a container filled with molten metal, comprising: a piston attached to a nut threaded with a ball screw; driving means for rotating said ball screw clockwise and counterclockwise; a hollow piston rod attached to said piston; a supporting member mounted on a distal end of said screw such that said hollow piston rod can slide on said member; and a rod head mounted on a distal end of said hollow rod, wherein said rod head includes: a flange attached to a distal end of said piston rod, said flange having a circular front surface; a circular polyurethane rubber plate mounted on said circular surface of said flange; and a protection plate mounted on a front surface of said polyurethane rubber plate, said protection plate having a heat conductivity of 3-50 W/mk.
Claim 3
Dependent Claim
28 words
The electric cylinder of claim 1, wherein the thickness of said circular polyurethane rubber plate is 15-25 mm, and the diameter of said rubber plate is 120-140 mm.
Claim 4
Dependent Claim
20 words
The electric cylinder of claim 2, wherein said protection plate is made of steel, stainless steel, or ceramics including zirconia.
Claim 5
Dependent Claim
20 words
The electric cylinder of claim 1, wherein said protection plate is made of steel, stainless steel, or ceramics including zirconia.
References Cited (Backward Citations)
US2166106A
Cited
US2227111A
Cited
US2594605A
Cited
US3134585A
Cited
US3219362A
Cited
SU425849A1
Cited
US3786551A
Cited
US4132825A
Cited
US4323345A
Cited
US4712770A
Cited
US4817977A
Cited
US5148714A
Cited
JPH0539821A
Cited
JPH05132296A
Cited
JPH06183694A
Cited
US5542335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-10-06 | 2001-04-07 | 2001-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-10-06 | 2005-04-07 | 2005-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-10-06 | 2009-04-07 | 2009-10-07 | $7700.00 | Window Closed / Lapsed |