Buckles – buttons – clasps – etc. – Strap-end-attaching devices – Buckle connected
Patent
1980-10-31
1982-09-28
Hirsch, Paul J.
Buckles, buttons, clasps, etc.
Strap-end-attaching devices
Buckle connected
24263DT, E21B 4300, E21B 300
Patent
active
043510906
ABSTRACT:
A wellhead slip formed from a plurality of slip segments adapted to be arranged in a closed circular fashion around a tubular member so as to form a plurality of vertical gaps all but one of which are defined as "hinge" gaps, the remaining gap being defined as an "opening" gap, the slip segments being provided with aligned circumferential grooves constituting, in effect, a peripheral groove for the complete slip. A hinge yoke is received in the circumferential grooves in the area of each hinge gap and spanning the hinge gap, each hinge yoke being provided with a notch adjacent each of its opposite ends and facing outwardly from the groove. A hinge pin passes through holes above and below the groove in the area of each notch whereby the notches are received behind the hinge pins and whereby all of the slip segments can be moved hingedly outwardly from the closed circular position by opening at the opening gap. A spring clip is received in the ends of the circumferential grooves of the adjacent segments in the area of the opening gap and is provided with a vertical width slightly less than the width of the grooves. A pair of latch pins are received in holes above and below the groove in the slip segments on opposite sides of the opening gap. The spring clip has a closed loop adapted to be received around one of the latch pins adjacent the opening gap and a resilient catch spaced from the closed loop for engagement around and behind the other of the roll pins adjacent the opening gap. A finger is attached to the resilient catch to permit bending of the catch away from the other of the latch pins for releasing the catch to permit opening of the slip segments.
REFERENCES:
patent: 1079689 (1913-11-01), Bowler et al.
patent: 1547543 (1925-07-01), Welty
patent: 2143615 (1939-01-01), Abegg
patent: 2689139 (1954-09-01), Jones et al.
patent: 2874437 (1959-02-01), Anderson
patent: 4275487 (1981-06-01), Gray et al.
Clements Gary B.
Ramsey Robert E.
Dorman William S.
Hinderliter Energy Equipment Corp.
Hirsch Paul J.
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