Implements or apparatus for applying pushing or pulling force – Rack and pinion
Patent
1988-10-31
1990-02-20
Schmidt, Frederick R.
Implements or apparatus for applying pushing or pulling force
Rack and pinion
254105, 254 97, B66F 302
Patent
active
049019821
ABSTRACT:
A system and method are provided to facilitate disengagement of two mechanisms engaged with one another with a high stress therebetween, such as in rack locking arrangements used on offshore platforms. The first mechanism (e.g., a rack) is mobile in relation to the second mechanism (e.g., a pair of locking jaws) which serves as a locking mechanism for the first mechanism. The level of stress between the first and second mechanisms is measured, and the measurement is converted into an electrical control signal. This signal is used to control motor-driven force applying elements (e.g., pinions) in engagement with the first mechanism. The force applying elements are controlled in such a manner as to apply force to the first mechanism sufficient to offset the aforementioned stress between the first and second mechanisms, thereby permitting friction-free disengagement of the mechanisms.
REFERENCES:
patent: 3986368 (1976-10-01), Levingston
patent: 4203576 (1980-05-01), Sutton
patent: 4269543 (1981-05-01), Goldman et al.
patent: 4453858 (1984-06-01), Guiader
patent: 4495824 (1985-01-01), Dantan
Havard Jean
Ravet Christian
Brissonneau et Lotz Marine
Hartman Judy J.
Schmidt Frederick R.
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