Patents Assigned to Häfner & Krullmann GmbH
  • Patent number: 7614582
    Abstract: Connector system for detachably connecting rotationally symmetrical parts, particularly parts of a spool for winding a skein-shaped product, with ring surfaces (22, 24) at the facing front surfaces of the parts to be connected, with locking projections (26, 28, 30, 32, 34) extending from at least one of the ring surfaces (22, 24) in the direction of the other ring surface, and with detent recesses (40, 42, 44, 46) in the ring surface or both other ring surfaces, respectively, for receiving the locking projections to connect the parts in the manner of a bayonet catch by mutual rotation, and spring-loaded tongues (52, 54) are provided in alignment with the respective detent recesses (40, 42, 44, 46), which engage behind the locking projections (26, 28, 30, 32, 34) in the locked position and prevent the connected parts from untwisting into the detached position.
    Type: Grant
    Filed: March 8, 2006
    Date of Patent: November 10, 2009
    Assignee: Häfner & Krullmann GmbH
    Inventor: Manfred Häfner
  • Patent number: 7611089
    Abstract: Spool for receiving wound skein material with a rotationally symmetrical conical spool body (10) with a detachable flange disc (14) at the end with the smaller diameter, in which the flange disc (14) and spool body (10) have ring surfaces (18, 20) on their facing surfaces, locking projections (20, 22) extend from the ring surface of one or both part(s) in the direction of the other ring surface, detent recesses (24, 26) to receive the locking projections are provided in the ring surface of one or both part(s), the locking projections and detent recesses can be locked in the manner of a bayonet catch by mutually rotating the spool body and the flange disc, and aligned with the detent recesses are spring-loaded tongues (38) which engage behind the locking projections in the connected position of the parts, and prevent the parts from untwisting.
    Type: Grant
    Filed: March 8, 2006
    Date of Patent: November 3, 2009
    Assignee: Häfner & Krullmann GmbH
    Inventor: Manfred Häfner
  • Patent number: 7588210
    Abstract: Spool for receiving a wound skein product includes a rotationally symmetrical spool body, with two axial ends provided with flange discs (16, 18), the spool being divided into two parts (10, 12) by a substantially radial dividing surface, these parts having front surfaces (36, 38) running adjacent and parallel to the dividing surface (14), the front surfaces having locking projections (48, 50) on at least one surface and, on the other surface at least, detent recesses (40, 42) which interact with the locking projections of the other spool part (10, 12), respectively, interlocking therewith in the form of a bayonet catch by mutual rotation of spool parts (10, 12), and the front surfaces (36, 38) are contrived such that the dividing line appearing around the spool circumference is wave-shaped.
    Type: Grant
    Filed: March 8, 2006
    Date of Patent: September 15, 2009
    Assignee: Häfner & Krullmann GmbH
    Inventor: Manfred Häfner
  • Publication number: 20080230648
    Abstract: Spool for receiving a wound skein product includes a rotationally symmetrical spool body, with two axial ends provided with flange discs (16, 18), the spool being divided into two parts (10, 12) by a substantially radial dividing surface, these parts having front surfaces (36, 38) running adjacent and parallel to the dividing surface (14), the front surfaces having locking projections (48, 50) on at least one surface and, on the other surface at least, detent recesses (40, 42) which interact with the locking projections of the other spool part (10, 12), respectively, interlocking therewith in the form of a bayonet catch by mutual rotation of spool parts (10, 12), and the front surfaces (36, 38) are contrived such that the dividing line appearing around the spool circumference is wave-shaped.
    Type: Application
    Filed: March 8, 2006
    Publication date: September 25, 2008
    Applicant: HÄFNER & KRULLMANN GMBH
    Inventor: Manfred Hafner
  • Publication number: 20080164366
    Abstract: A method for winding a skein-shaped windable product onto a spool formed of two spool halves (12, 14) which converge conically towards a middle radial plane (10) with two flange discs (16, 18) at the outer ends, includes the steps of rotating the spool about its central axis during the winding process, and feeding the windable product by a guide that moves along the length of the spool. There is further step of winding the windable product in layers substantially parallel to the lower conical surface up to the top conical surface, and the winding layers end respectively in a cylindrical surface connecting the circumference of the two flange discs (16, 18).
    Type: Application
    Filed: March 8, 2006
    Publication date: July 10, 2008
    Applicant: HÄFNER & KRULLMANN GMBH
    Inventor: Manfred Hafner
  • Publication number: 20080135676
    Abstract: Connector system for detachably connecting rotationally symmetrical parts, particularly parts of a spool for winding a skein-shaped product, with ring surfaces (22, 24) at the facing front surfaces of the parts to be connected, with locking projections (26, 28, 30, 32, 34) extending from at least one of the ring surfaces (22, 24) in the direction of the other ring surface, and with detent recesses (40, 42, 44, 46) in the ring surface or both other ring surfaces, respectively, for receiving the locking projections to connect the parts in the manner of a bayonet catch by mutual rotation, and spring-loaded tongues (52, 54) are provided in alignment with the respective detent recesses (40, 42, 44, 46), which engage behind the locking projections (26, 28, 30, 32, 34) in the locked position and prevent the connected parts from untwisting into the detached position.
    Type: Application
    Filed: March 8, 2006
    Publication date: June 12, 2008
    Applicant: HÄFNER & KRULLMANN GMBH
    Inventor: Manfred Hafner
  • Patent number: D654981
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: February 28, 2012
    Assignee: Häfner & Krullmann GmbH
    Inventor: Jan Häfner