GASKET
FIG5 is a cross-sectional view taken along line C-C in FIG1
FIG5 is a cross-sectional view taken along line C-C in FIG1. FIG5 is a cross-sectional view including the protrusions 20 with the small protrusions 20b. As shown in FIG5, the small protrusions 20b are located, for example, in the middle of the support surfaces 20a in the height direction. However, the small protrusions 20b may be located in different places. Each support surface 20a may have a plurality of small protrusions 20b arranged in the height direction.
cross-sectional view
14
upper surface
12
outer circumferential surface
50
groove
10
base
70
bottom surface
13
lower surface
['1. A gasket (100) to be placed in an annular groove, the gasket (100) comprising: an annular base (10) to be placed in the groove; and a plurality of protrusions (20) arranged at intervals on the base (10) in a circumferential direction of the base (10), the plurality of protrusions (20) protruding from the base (10) to face side surfaces of the groove and having support surfaces (20a) with curvatures corresponding to curvatures of the side surfaces of the groove, wherein each protrusion (20) has a length (L1) in the circumferential direction greater than an interval (L2) between facing ends of adjacent ones of the protrusions (20) in the circumferential direction.']