| 摘要 |
<p>PURPOSE:To prevent the lowering of the performance of a boot, by putting heat insulating materials to the piston side. CONSTITUTION:A ring 7 in heat insulating materials, such as, plastic, etc. is fitted onto an outer circumference of a piston 2, and a boot 3 is mounted between the ring 7 and cylinder 1. When it is necessary to seal a portion between the piston 2 and the ring 7, an O ring produced by putting adhesives between the piston and the ring is inserted. A cuplike portion material 11 in heat insulating materials is inserted into the piston, and the boot 3 may be installed between the portion material 11 and the cylinder 1. Thus, boots, which have thermally aged remarkably, can be protected because heat insulating materials are put to heat transfer courses up to dust boots from rotors.</p> |
