Vacuum brake boosters

Details Vacuum brake boosters Vacuum brake boosters

B - Operations, Transporting

60

T

303/78

B60T 1/00 (2006.01) B60T 13/565 (2006.01) B60T 13/567 (2006.01)

Patent

CA 1221128

ABSTRACT OF THE DISCLOSURE A power assist apparatus (18) having a first shell (32) connected to a second shell (34) by a twist lock arrangement (41). The shells (32) and (34) are made of a light weight and flexible material such that when subjected to temperatures above 120°F the pressure differential created by vacuum on the inside of the shells (32 & 34) and atmospheric pressure on the outside of the shells (32 & 34) a crushing force is produced that urges the end (33) of the shell (32) toward shell (34). A plurality of struts 198) located between the shells (32 & 34) resists this crushing force to maintain the minimum spacial relationship between shells (32 & 34).

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