US1747623A - Clamping device - Google Patents

Description

Feb. 18, 1930. P. Q. FlcKERT CLAMPING DEVICE Filed Sept. 17; 1928 Q 5 QPg NTOR,

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ATTORNEY Patented Feb. 18, 1930 UNITED STATES PHILIP Q. FICKERT, OF SAN FRANGISGO, CALIFORNIA CLAMPING DEVICE Application filed September 17, 1928.

This invent-ion relates to improvements in clamping devices of the kind adapted for use in handling heavy pieces of material such as steel bars or the like.

An object of my invention is to provide improvements in clamping devices wherein is embodied fixed and movable members which co-operate to firmly grasp heavy loads.

Another object of my invention is to provide a clamping device for lifting purposes wherein is embodied a fixed member and a movable member, the latter being actuated toward the former to firmly grasp a load positioned between the two members.

Other objects more or less apparent will present themselves or will be specifically pointed out in the description to follow.

In the accompanying drawings:

Fig. 1 is a front view of a clamping device embodying my invention;

Fig. 2 is a rear view of the same;

Fig. 3 is a side view of the same;

Fig. 4 is a side elevation of the same showing a load held between the fixed and movable members thereof; and

Fig. 5 shows a part of my improved clamping device as viewed from the front, with a means for equalizing the load attached there- Referring to the drawings the numeral 1 represents a fixed member having a slotted vertical opening 2 located therein. Secured to the lower end of the fixed member or integrally formed therewith is an outwardly projecting part 3 which is adapted to form a support for a load placed thereon.

Movably attached to the fixed member by bolts 4 and 5 which loosely extend through the slotted opening 2, is a movable member 6 which is provided with an outwardly extending flange 7.. Pivotally attached at ends thereof to the movable member 6 as by the bolt 5, are a pair of toggles or links 8 which are pivotally secured at their opposite ends to a second pair of toggles or links 9 by bolts 10. The second pair of links 9 are pivotally attached by a bolt 11 at points adjacent their central portions to the upper portion of the fixed member 1. A washerorother Serial No. 806,539.

suitable device 12 which extends around the bolt 11 serves to properly maintain the links 1?) in a separated position from the fixed memer 1.

Attached to the ends of the links 9 is a wire rope 13 which movably extends over a roller 14 that is revolvably maintained by a pin between the ends of an inverted U-shaped bar'1'5. The Wirerope is free to move in either direction over the roller 14 when a lifting force is applied to the bar 15, thereby causing the weight of the load to be more evenly distributed to each of the links 9.

It will be noticed that each of the bolts 4.

and 5 is provided at its rear end with an enlarged head which prevents its removal from the slot 2.

a In practice the outwardly projecting end 3 of the fixed member 1 is placed under a load A, and a lifting force is applied to the two upper links 9 through the inverted U- shaped bar 15. The upper ends of the links 9 are drawn upwardly and toward each other, thereby causing the lower joined ends of the links 8 to be moved downwardly. The movable member 6 is thereby actuated in a downward direction with the bolts 4 and 5 moving inside the slot 2. The outwardly extending flange 7 of the movable member 6 is forced firmly against the upper side of the load A, thereby causing the same to be tightly grasped between the movable flange 7 and the outwardl projecting part 3 of the fixed member 1. t is of consequence to note that the flange 7 is pressed more or less firmly against the load A, dependent upon the weight of the load and the lifting force applied to the ends of the links 9.

It is apparent that my improved clamping means may be embodied in other forms than the one described and shown herein, so for this and other apparent reasons I desire my invention included broadly within the spirit of the appended claims.

Having described my invention what I claim is:

1. A device of the class described comprising in combination with a fixed member, of a movable member attached to the fixed memher, and a plurality of connected links pivotally attached to the movable member for moving the same toward the fixed member.

2. A device of the class described comprising in combination with a fixed member having a slot therein, a bolt slidably extending through the slot, a movable member secured to the bolt and adapted to move therewith, a pair of links pivotally attached to the movable member, and a second pair of links movably attached to the fixed member and to the first mentioned pair of links.

3. In a device of the class described comprising in combination with a fixed member, of a movable member slidably-attached to the fixed member, a pair of links pivotally attached to the movable member, and a second pair of links pivotally attached to .the fixed member and to the first mentioned pair of links.

23 4. In a device of the class described comprising in combination with a fixed member having an outwardly disposed projection thereon, a movable member slidably attached to the fixed member having an out- 53:; wardly disposed projection thereon, a pair of links pivotallyattached to the movable member, a second pair of links pivotally attached to the fixed member and to the first mentioned pair of 1inks,',and means attached .to the sec- 0nd mentioned air of links for enabling a lifting force to e evenly applied to each of said links. I

In testimony whereof I affix my signature.

PHILIP Q. F IGKERT.

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