Buckles – buttons – clasps – etc. – Strap-end-attaching devices – Buckle connected
Patent
1979-04-25
1981-06-30
Grosz, Alexander
Buckles, buttons, clasps, etc.
Strap-end-attaching devices
Buckle connected
294102A, E21B 1907, A44B 2100
Patent
active
042754887
ABSTRACT:
A combined well casing spider and elevator is formed of a main body having a downwardly tapered bowl inner wall. The main body has an open end wall having spaced apart recessed flanges on either side of the opening. A gate member is pivotally secured to one of the recess flanges and releasably secured to the other of the recessed flanges to close the open end wall when the gate is in a secured position. The gate member pivots laterally when released to permit the lateral entry of a well casing within the area defined by the bowl inner wall. A circumferential array of casing gripping slips are arranged in opposing pairs for vertical and radial mounting in surface contact with the bowl inner wall, the gripping slips forming a circular hole within the center of the array to receive a well casing. The slips are vertically moveable along the bowl inner wall to effect radial enlargement and contraction of the circular hole formed thereby by upward and downward movement respectively to release and grip the casing. A lever operates lift means within the main body including a cross bar, crank arms and lift arms to effect vertical movement of a diametrically oppose pair of casing gripping slips. The array of casing gripping slips comprise four arcuate segments, the pair of opposite slips one of which is mounted on the gate inner wall being floating segments while the other pair of slips which are connected to the lift means being driven segments. A pair of C-shaped members mounted on the tops of the floating segments interconnect with a pair of arcuate channel members mounted on the tops of the driven segments so that when the driven segments are moved vertically, the floating segments also move vertically.
REFERENCES:
patent: 1650101 (1927-11-01), Taylor
patent: 2156384 (1939-05-01), Fluellen
patent: 2234489 (1941-03-01), Garrison et al.
patent: 2890513 (1959-06-01), Lane
patent: 3675275 (1972-07-01), Powell
patent: 4035012 (1977-07-01), Guier
Gray, deceased Charles E.
Gray, executrix by Emma D. W.
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