US 7,562,475 B2
Embroidery hoop with a tensioning device
Michael Konig, Constance (Germany); and Thomas Guggisberg, Boswil (Switzerland)
Assigned to BERNINA International AG, Steckborn (Switzerland)
Filed on Feb. 27, 2008, as Appl. No. 12/38,191.
Claims priority of application No. 00444/07 (CH), filed on Mar. 20, 2007.
Prior Publication US 2008/0229629 A1, Sep. 25, 2008
Int. Cl. D06C 3/08 (2006.01); D05C 9/04 (2006.01)
U.S. Cl. 38—102.2  [112/103] 9 Claims
OG exemplary drawing
 
1. Embroidery hoop (1) with at least one tensioning device (11), comprising a closed inner frame (5) and an outer frame (3) that is open in at least one position and a turning knob (33) arranged on the outer frame (3), with which two open ends (13, 15) of the outer frame (3) can be tightened around the inner frame (5), an elongated tension element (17) is arranged as a tensioning element on the first open end (13) and a rotatable tensioning element that can be locked and that engages the elongated tension element (17) is arranged on the second open end (15), the elongated tension element comprises a toothed rack (17) on the first end (13) and the rotatable tensioning element comprises a toothed pinion (41) arranged on the second end (15) that can rotate and be locked with the toothed rack, and the pinion (41) is locked in rotation with a ratchet (37), which acts as an overload protection.