F - Mech Eng,Light,Heat,Weapons – 16 – D
Patent
F - Mech Eng,Light,Heat,Weapons
16
D
F16D 65/56 (2006.01) F16D 55/227 (2006.01) F16D 65/14 (2006.01) F16D 55/00 (2006.01)
Patent
CA 2121118
2121118 9309361 PCTABS00022 The disc brake (100) with variable width caliper and powered actuation comprises first and second bridge members (14, 15) which are connected with a pair of movable members (20, 30) extending over the periphery of the rotor (51). Each of the movable members (20, 30) is mounted upon an anchor extension (37A, 38A). An inboard end of each movable member (20, 30) includes threads (26, 36) upon which is threadably mounted a nut (28, 29). The nut (28, 29) has ratchet teeth (12, 13) on one axial end which engage ratchet teeth (10A, 11A) of an associated actuator sleeve (10, 11) disposed slidably about the movable member (20, 30). Each actuator sleeve (10, 11) includes gear teeth (10C, 11C) about its circumference. The second bridge member (15) is mounted slidably upon the movable members (20, 30). The gear teeth (10C, 11C) of the actuator sleeves (10, 11) are engaged by a powered rack member (110) which includes a double ended piston (117) within a housing (115) defining with the piston (117) a pair of hydraulic pressure chambers (120, 122). The double ended piston (117) includes a connecting arm (125) connecting the piston (117) with a rack (130) of the powered rack member (110) so that hydraulic pressure can effect displacement of the double ended piston (117) and a corresponding lateral displacement of the rack (130). Lateral displacement of the rack (130) effects rotation of the actuator sleeves (10, 11) which, through the engaged ratchet teeth (10A, 11A; 12, 13), causes the nuts (28, 29) to rotate and effect translational movement of the movable members (20, 30). The actuator sleeves (10, 11) engage roller thrust bearings (44, 45) which, as the nuts (28, 29) change their positions along the movable members (20, 30), displace the second bridge member (15) and a friction lining mechanism (16) against the rotor (51), and by reaction, the movable members (20, 30) bring a friction lining mechanism (17) of the first bridge member (14) into engagement with the other face of the rotor (51). The second bridge member (15) may include one or more bores (50) each receiving therein a piston (52) and actuatable by hydraulic fluid.
Alliedsignal Inc.
Gowling Lafleur Henderson Llp
LandOfFree
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