Insulated carafe

• US 4,718,566 A
• Filed: 12/31/1986
• Issued: 01/12/1988
• Est. Priority Date: 09/19/1984
• Status: Expired due to Fees

• Current Assignee: Braun Aktiengesellschaft
• Original Assignee: Braun Aktiengesellschaft
• Inventors: Wunder, Dieter
• Primary Examiner(s): Price, William
• Assistant Examiner(s): Weaver, Sue A.
• Application Number:
  US06/948,107
• Time in Patent Office: 377 Days
• Field of Search: 215/12 R, 215/12 A, 215/13 R, 215/13 A, 215/100 A, 222/183, 222/465.1, 220/420, 220/421, 220/425
• US Class Current: 215/13.1
• CPC Class Codes: A47G 19/12 Vessels or pots for table use
• CPC Class Codes: A47G 19/127 with means for keeping liquid cool or hot vacuum bottles A47J41/02

Abstract

The proposed insulated carafe consists of an inner container, especially one made of glass,and a plastic jacket, with a seal between the inner container and the plastic jacket being provided exclusively by an elastic positive fit between the parts mentioned.

Claims

1. Insulated carafe comprising

an inner container having a cylindrical wall portion with an annular outwardly inclined upper edge surface and a transverse base portion,

jacket structure housing said inner container, said jacket structure including

a first member having a cylindrical body portion surrounding and spaced from the cylindrical wall portion of said inner container, an annular, continuous flexible flange adjacent the top of said first member and seated in positive sealing relation under radial and axial elastic pretension on said outwardly inclined upper edge surface of said inner container, and coupling structure adjacent the bottom of said cylindrical body portion, and

a second member having a cylindrical body portion, an annular continuous flexible flange that has an upwardly directed inner edge that provides a circumferential sealing lip, said sealing lip abutting the marginal area of said transverse base portion of said inner container under pretension acting parallel to the central axis of said carafe in positive sealing relation under elastic pretension, and coupling structure in coupling engagement with the coupling structure of said first member,

said first and second members having cooperating sealing surfaces adjacent said coupling structures in sealing engagement to provide a continuous seal between said first and second members, said inner container and said jacket structure cooperating to provide a sealed chamber surrounding a cylindrical body portion of said inner container.

2. The carafe of claim 1 and further including radial reinforcing ribs extending between said annular flexible flange and said cylindrical body portion of said first member.

3. The carafe of claim 1 wherein the lower edge of said first jacket member fits over the upper edge of said second jacket member in overlapping relation, and said cooperating sealing surface on one of said jacket members comprises a circumferential radial projection which abuts the cooperating sealing surface of the other said jacket member and provides a positive seal under radial pressure all the way around said jacket structure.

4. The carafe of claim 3 wherein said cooperating sealing surface is cylindrical and said circumferential radial projection has an approximately triangular cross-section with its apex abutting said cylindrical sealing surface.

5. The carafe of claim 4 wherein said first jacket member has reinforced structure in the area of said circumferential radial projection, said reinforced structure having a wall thickness greater than the remainder of the wall thickness of said cylindrical body portion.

6. The carafe of claim 1 wherein said cooperating coupling structures of said first and second jacket members are disposed on the sealed chamber side of said sealing surfaces.

7. The carafe of claim 1 wherein said coupling structures comprise internal thread structure on said first jacket member and cooperating external thread structure on said second jacket member, said thread structures subjecting said flexible flanges of said first and second jacket members to pretensioning in a direction parallel to the central axis of said carafe.

8. The carafe of claim 1 and further including radial reinforcing ribs formed between said body portion of said second jacket member and said annular flexible flange.

9. The carafe of claim 1 wherein said annular flange of said second jacket member supports said transverse base portion of said inner container spaced above the bottom of said second jacket member.

10. The carafe of claim 1 and further including thermal insulation material disposed in the sealed chamber between the cylindrical wall portion of said inner container and said cylindrical body portions of said jacket structure.

11. The carafe of claim 10 wherein said inner container is of glass of single wall thickness and said jacket structure is of plastics material.

12. The carafe of claim 11 wherein the lower edge of said first jacket member fits over the upper edge of said second jacket member in overlapping relation, and said annular sealing structure comprises a circumferential radial projection on one of said jacket members which abuts the cooperating sealing surface of the other said jacket member and provides a positive seal under radial pressure all the way around said jacket structure.

13. The carafe of claim 12 wherein said coupling structures comprise internal thread structure on said first jacket member and cooperating external thread structure on said second jacket member, said thread structures subjecting said flexible flanges of said first and second jacket members to pretensioning in a direction parallel to the central axis of said carafe.

14. The carafe of claim 13 wherein said annular flange of said second jacket member supports said transverse base portion of said glass container spaced above the bottom of said second jacket member with the middle part of the base of the glass container exposed so that it can be brought into direct thermal contact with the warming plate of a coffee maker.

15. The carafe of claim 1 wherein said inner container is of a single wall thickness glass, said jacket structure is of plastics material, said annular flange of said second jacket member supports said transverse base of said inner container spaced above the bottom of said second jacket member with the middle part of the base of the inner container exposed so that it can be brought into direct thermal contact with the warming plate of a coffee maker, and further including thermal insulation material disposed in said sealed chamber between the cylindrical wall portion of said inner container and said cylindrical body portions of said jacket structure.

16. Insulated carafe comprising

an inner container having a cylindrical wall portion with an outwardly inclined annular upper edge surface and a transverse base portion,

jacket structure housing said inner container, said jacket structure including

a first member having a cylindrical body portion surrounding and spaced from the cylindrical wall portion of said inner container, an annular, continuous flexible flange adjacent the top of said first member, said continuous flange exending over said upper edge surface of said inner container and said flange having an inner edge seated in positive sealing relation under elastic pretension on said outwardly inclined surface portion of said cylindrical wall portion and providing a first positive continuous seal all the way around said inner container, and coupling structure adjacent the bottom of said cylindrical body portion,

a second member having a cylindrical body portion, an annular continuous flexible flange seated in positive sealing relation under elastic pretension on a lower portion of said inner container to provide a second positive continuous seal all the way around said inner container, and coupling structure in coupling engagement with the coupling structure of said first member,

said first and second members having cooperating sealing surfaces adjacent said coupling structures in sealing engagement to provide a third continuous seal all the way around between said first and second members, said inner container and said jacket structure and said first, second and third continuous seals cooperating to provide a sealed chamber surrounding a cylindrical body portion of said inner container, and thermal insulation material disposed in said sealed chamber between said cylindrical body portion of said inner container and said cylindrical body portions of said jacket structure.

17. The carafe of claim 16 wherein said inner container is of single wall thickness glass, and said jacket structure is of plastics material.

18. The carafe of claim 16 wherein said cooperating coupling structures of said first and second jacket members are disposed on the sealed chamber side of said third seal.

19. The carafe of claim 16 wherein said annular flange of said second jacket member supports said transverse base portion of said inner container spaced above the bottom of said second jacket member with the middle part of the base of the inner container exposed so that it can be brought into direct thermal contact with the warming plate of a coffee maker.

20. The carafe of claim 19 wherein said inner container is of single wall thickness glass, said jacket structure is of plastics material, and said first member includes structure defining a pouring spout that extends radially outwardly from a point above said annular flange of said first member and structure defining a handle on the side of said first member generally opposite said pouring spout structure.