Machine element or mechanism – Control lever and linkage systems – Elements
Patent
1981-10-23
1984-10-30
Grosz, Alexander
Machine element or mechanism
Control lever and linkage systems
Elements
521251, 405198, 254108, G05G 506
Patent
active
044794010
ABSTRACT:
A plurality of lock bolts are flexibly stacked in a frame at a lesser angle above the horizontal than the frame is slidably mounted in a rack and pinion jack-up rig's horizontal part. The steeper frame mounting angle reduces sliding friction by the vertical component of gravity. The flatter mounting angle of the lock bolts increases bolt locking efficiency that is a maximum at the horizontal. Free ends of the lock bolts project beyond the frame and are adapted to engage and disengage with the rack of the rack and pinion jack-up rig, the rack being oppositely mounted on the vertical part thereof. The frame is slidably actuated by an hydraulic cylinder pivoted to the horizontal part and the frame. The projecting free ends are roughly wedge shaped for engaging with the rack, and have arcuate lower engaging surfaces and flat upper engaging surfaces, the last of which extend from respective vertical abutments to define a steeper angle than opposing rack engaging surfaces. Individual flexibility in lock bolt mounting is obtained by loosely securing the bolts in the frame and using elastic material for backing and separating the bolts.
REFERENCES:
patent: 599026 (1898-02-01), Thomas
patent: 4212450 (1980-07-01), Lambert
patent: 4255069 (1981-03-01), Yielding
patent: 4270877 (1981-06-01), Post
patent: 4329088 (1982-05-01), Lucas
Grosz Alexander
Raskob, Jr. Anthony W.
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