Machine element or mechanism – Control lever and linkage systems – Multiple controlling elements for single controlled element
Patent
1989-06-02
1992-08-04
Luong, Vinh T.
Machine element or mechanism
Control lever and linkage systems
Multiple controlling elements for single controlled element
74483PB, 74526, 74527, G05G 1100, G05G 104
Patent
active
051348969
ABSTRACT:
A roller linkage assembly (10) of the type for positively locking a traveling rail member (18). The assembly (10) includes a housing (22). The housing has a passageway (24, 26, 28) therethrough. A plurality of rollers (30, 32, 34) are moveably disposed in the passageway (24, 26, 28). An actuation cylinder (14) has a piston (16) extending outwardly therefrom for movement in the passageway (24). The piston (16) surrounds a first roller (30) for positively moving the same in response to a force applied by the actuation cylinder (14). When the cylinder (14) is energized, the first roller (30) is moved to a locked condition. This forces a second roller (32) to its locked condition. Finally, the force is transmitted to a third roller (34) and the third roller (34) engages a notch (36) in the traveling rail member (18) to prevent movement of the same. When the assembly (10) is in the locked condition, no forces are transmitted from the rail (18) to the piston (16).
REFERENCES:
patent: 1802975 (1931-04-01), Kintzele
patent: 2647166 (1953-07-01), Lens
patent: 2965169 (1960-12-01), Berghell
patent: 3355558 (1967-11-01), Geese et al.
patent: 3842689 (1974-10-01), Bagge
patent: 4031340 (1977-06-01), Pastorel
patent: 4541299 (1985-09-01), Kanaya et al.
patent: 4550628 (1985-11-01), Yarnell
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