US 12,303,421 B2
Lumbar pillow and lumbar pillow set
Masashi Hoshino, Gifu (JP)
Assigned to GAISENN LLC, Gifu (JP)
Appl. No. 17/909,253
Filed by GAISENN LLC, Gifu (JP)
PCT Filed Mar. 9, 2021, PCT No. PCT/JP2021/009104
§ 371(c)(1), (2) Date Sep. 2, 2022,
PCT Pub. No. WO2021/187210, PCT Pub. Date Sep. 23, 2021.
Claims priority of application No. 2020-048646 (JP), filed on Mar. 19, 2020.
Prior Publication US 2023/0090489 A1, Mar. 23, 2023
Int. Cl. A61F 5/00 (2006.01); A47C 7/42 (2006.01); A47G 9/10 (2006.01); A61F 5/02 (2006.01)
CPC A61F 5/028 (2013.01) [A47C 7/425 (2013.01); A47G 9/10 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A lumbar pillow comprising:
an outer cushioning member formed of a semi-hard foam, and including, in a cross-section:
a central portion;
an outer peripheral portion including:
a horizontal bottom surface; and
a top surface,
the bottom surface and the top surface defining a partially cylindrical shape in the cross-section; and
an approximately dome-shaped hollow space formed in at least a part of the central portion; and
an inner cushioning member formed of a semi-hard foam and disposed within the hollow space; and
wherein when the lumbar pillow is placed under the lower back of a user lying in the supine position, a load X [kg] applied to the lumbar pillow from the user is equal to a value obtained by multiplying a weight W of the user by a coefficient 0.59.
 
19. A lumbar pillow set comprising:
a lumber pillow including:
an outer cushioning member formed of a semi-hard foam, and including, in a cross-section:
a central portion;
an outer peripheral portion including:
a horizontal bottom surface; and
a top surface,
 the bottom surface and the top surface defining a partially cylindrical shape in the cross-section; and
an approximately dome-shaped hollow space formed in at least a part of the central portion; and
an inner cushioning member formed of a semi-hard foam and disposed within the hollow space;
a knee pillow formed of a semi-hard foam, wherein in the longitudinal direction, the knee pillow has a scalene triangle cross-sectional shape with a cut off shape; and
at least one length-adjustable belt for connecting the lumbar pillow and the knee pillow and
wherein when the lumbar pillow is placed under the lower back of a user lying in the supine position, a load X [kg] applied to the lumbar pillow from the user is equal to a value obtained by multiplying a weight W of the user by a coefficient 0.59.