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US4698003A Expired / Lapsed US ⏱️ 0.0 years remaining

Tire curing press

Assignee: McNeil and NRM Inc
•
Filing: 1986-08-27
•
Granted: 1987-10-06
•
Expires: 2006-08-27
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Abstract

Abstract A tire curing press incorporates an improved seal assembly for the center mechanism or bladder assembly. The bottom or lower clamp ring assembly for the shaping bladder is normally threaded on a hub. The hub and ring assembly include cylindrical telescoping surfaces and axially facing surfaces with an O-ring or seal ring provided between the former and a harder bumper ring provided between the latter. The present invention eliminates the seal between the cylindrical surfaces and provides between the axially facing surfaces a special seal assembly which includes an annular sealing plate with a low coefficient of friction and two sealing O-rings on each side thereof. The seal assembly prevents "blow-by" and makes the parts easier to assemble and disassemble under various temperature conditions.

Inventors

  • 👤 Anand P. Singh

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 20:37
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/0601; B29D30/0662

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 68 words
A center mechanism including a shaping bladder for a tire curing press comprising a bottom hub, a clamp ring assembly for the bladder, said clamp ring assembly and hub including cylindrical telescoping surfaces, and opposed axially facing surfaces, a sealing plate ring between said axially opposed facing surfaces, and static seal rings on axially opposite sides of said sealing plate ring and the respective axially opposed facing surfaces.
Claim 2
Dependent Claim 68 words
A center mechanism including a shaping bladder for a tire curing press comprising a bottom hub, a clamp ring assembly for the bladder, said clamp ring assembly and hub including cylindrical telescoping surfaces, and opposed axially facing surfaces, a sealing plate ring between said axially opposed facing surfaces, and static seal rings on axially opposite sides of said sealing plate ring and the respective axially opposed facing surfaces.
Claim 3
Dependent Claim 28 words
A center mechanism as set forth in claim 1 wherein said sealing plate ring comprises a ring of metallic or non-metallic material with a low coefficient of friction.
Claim 4
Dependent Claim 38 words
A center mechanism as set forth in claim 2 wherein said sealing plate ring comprises a generally U-shape in radial section plate having a groove in the top surface thereof, with a static O-ring seal in such groove.
Claim 5
Dependent Claim 31 words
A center mechanism as set forth in claim 3 wherein said hub has a groove in its facing surface with a static O-ring seal therein adapted to engage said sealing plate.
Claim 6
Dependent Claim 25 words
A center mechanism as set forth in claim 2 wherein said sealing plate ring has a groove in each of the opposite axial surfaces thereof.
Claim 7
Dependent Claim 15 words
A center mechanism as set forth in claim 5 wherein said grooves are axially aligned.
Claim 8
Dependent Claim 15 words
A center mechanism as set forth in claim 5 wherein said grooves are axially offset.
Claim 9
Dependent Claim 19 words
A center mechanism as set forth in claim 1 wherein said cylindrical telescoping surfaces are formed with substantial clearance.
Claim 10
Dependent Claim 19 words
A center mechanism as set forth in claim 8 wherein said cylindrical telescoping surfaces are free of fluid seals.

References Cited (Backward Citations)

US4527946A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1990-10-05 1991-04-06 1991-10-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1994-10-05 1995-04-06 1995-10-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1998-10-05 1999-04-06 1999-10-06 $7700.00 Window Closed / Lapsed

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