Resilient wedge for core expander tool
OwnerMilton W. Soward, F. Pat Baileyinventors
Life of this patent
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Abstract
An expansion tool having a resilient wedge held in the inner face of an expandable jaw for engaging a ram tongue to expand the jaw. Each resilient wedge has a surface which has a low coefficient of friction, is self-lubricating and which does not bind with the surface of the tongue at high pressure, is angled to repeatedly engage the tongue and communicate great pressure to the jaws without the use of breakable or moving parts in the jaws, is comprised of a material resilient enough and is properly angled to cause the tongue to disengage when the pressure is released, and is hard, dense, and resilient enough to repeatedly withstand great pressure without breaking.
Claims14
A device for straightening a deformed core of a roll of sheet material, including:
- a hollow collar;
- at least a pair of jaws comprised of a first and a second jaw, the pair pivoted to the collar, the jaws having external and internal surfaces;
- the collar and the jaws being sized for receipt by the core;
- a tongue with at least two faces tapered to an edge and mounted for longitudinal movement within the jaws and the collar;
- means secured to the collar for selectively driving the tongue between the jaws to actuate the jaws outward;
- a pair of wedges, said pair comprising a first wedge with a first face thereon and a second wedge with a second face thereon, the first wedge being mounted to the internal surface of the first jaw and the second wedge being mounted to the internal surface of the second jaw, said pair of wedges thereby being in an opposing relationship on the internal surfaces of the jaws for engaging at an acute angle the faces of the tongue during the driving of the tongue between the jaws, wherein such engaging prevents contact between the jaws and the tongue, said pair of wedges having a surface with a low coefficient of friction which does not bind to the surface of the tongue at pressures of 10 tons or more and is angled to engage the tongue and communicate 10 tons or more of pressure from the tongue to the jaws and is comprised of a material resilient enough and hard enough to withstand multiple engagement and disengagement of at least 10 tons of pressure without cracking, disintegration, or substantial permanent deformation.
A device for straightening a deformed core of a roll of sheet material, including:
- a hollow collar;
- at least a pair of jaws comprised of a first and a second jaw, the pair pivoted to the collar, the jaws having external and internal surfaces, the collar and the jaws being sized for receipt by the core;
- a tongue with at least two faces tapered to an edge with an included angle of 15.degree. between the two faces and mounted for longitudinal movement within the jaws and the collar;
- means secured to the collar for selectively driving the tongue between the jaws to actuate the jaws outward;
- a pair of wedges, said pair comprising a first wedge with a first face thereon and second wedge with a second face thereon, said first and second face having an included angle of 30.degree. therebetween, the first wedge being mounted to the internal surface of the first jaw and the second wedge being mounted to the internal surface of the second jaw, said pair of
- wedges thereby being in an opposing relationship on the internal surfaces of the jaws for engaging at an acute angle the faces of the tongue during the driving of the tongue between the jaws, wherein such engaging prevents contact between the jaws and the tongue, said pair of wedges having a surface with a low coefficient of friction which does not bind to the surface of the tongue at pressures of 10 tons or more of pressure from the tongue to the jaws and is comprised of a material resilient enough and hard enough to withstand mulitple engagement of the tongue of at least 10 tons of pressure and disengagement without cracking, disintegration, or substantial permanent deformation.
Dependencies are inferred from the claim text.