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A hydropnuematic riveter system is described, having features that allow for a reduction in size and weight over traditional rivet squeezers and rivet pullers. The riveter system also provides for greater versatility by permitting the operator to connect different rivet forming heads to the pressure

A hydropnuematic riveter system is described, having features that allow for a reduction in size and weight over traditional rivet squeezers and rivet pullers. The riveter system also provides for greater versatility by permitting the operator to connect different rivet forming heads to the pressure intensifier portion, via a single flexible conduit with fluid-tight quick disconnect fittings.

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1. A hydropneumatic riveter comprising a first body and a second body, said first body and said second body operably connected by a single, flexible conduit, said flexible conduit containing a fluid, said first body comprising a cylindrical bore into which a piston is installed for axially slideable

1. A hydropneumatic riveter comprising a first body and a second body, said first body and said second body operably connected by a single, flexible conduit, said flexible conduit containing a fluid, said first body comprising a cylindrical bore into which a piston is installed for axially slideable engagement with said bore and acted on by the fluid of said conduit, said second body comprising a first piston and a second piston, said first piston having a substantially larger diameter than said second piston, said first piston actuated by a gas contained within said second body, said second piston compressing the fluid within said conduit, said riveter further comprising a control mounted to the second body for modulating said first piston. 2. The hydropneumatic riveter of claim 1 wherein said first body and said second body each further comprise a threaded bleed fitting, for selectively removing unwanted air from said fluid of said flexible conduit. 3. The hydropneumatic riveter of claim 1 wherein said first body and said flexible conduit each further comprise a portion of a fluid quick disconnect fitting for selectively coupling and uncoupling said first body from said flexible conduit. 4. The hydropneumatic riveter of claim 1 wherein said first body further comprises a C-shaped yoke. 5. The hydropneumatic riveter of claim 1 wherein said first body further comprises a plurality of split conical jaws, said split jaws having a portion of an internal diameter with serrations, and said piston of said first body further comprising a conical internal bore for interfacing with said split conical jaws. 6. The hydropneumatic riveter of claim 1 wherein said first body further comprises a first jaw and a second jaw, said first jaw and said second jaw oriented in the form of an alligator rivet squeezer. 7. The hydropneumatic riveter of claim 1 wherein said first body further comprises a compression spring for applying a preload to said piston. 8. The hydropneumatic riveter of claim 1 further comprising a threaded compression pin, wherein said piston of said first body comprises a threaded bore for selectively changing the distance between said piston and the threaded compression pin installed in said piston. 9. The hydropneumatic riveter of claim 1 wherein said control is a double acting valve. 10. The hydropneumatic riveter of claim 1 further comprising a base, wherein second body is mounted to the base and the control comprises a control valve that is manually operated by a foot pedal, the foot pedal also mounted to the base. 11. A hydropneumatic riveter comprising a first body and a second body, said first body and said second body operably connected by a single, flexible conduit, said first body comprising a piston oriented so as to move in a direction substantially parallel to a cylindrical axis of a fastener to be formed, said second body comprising a first piston and a second piston, said first piston having a substantially larger diameter than said second piston, said first piston actuated by a gas and acting on said second piston, said second piston compressing a fluid within said flexible conduit, said hydropneumatic riveter further comprising a control operatively connected to the second body and remotely positioned from the first body, the control operated to actuate the first piston of the second body thus compressing the fluid in the flexible conduit so as to move the piston of the first body. 12. The hydropneumatic riveter of claim 11 wherein said first body and said second body each further comprise a threaded bleed fitting, for selectively removing unwanted air from said fluid of said flexible conduit. 13. The hydropneumatic riveter of claim 11 wherein said first body and said flexible conduit each further comprise a portion of a fluid quick disconnect fitting for selectively coupling and uncoupling said first body from said flexible conduit. 14. The hydropneumatic riveter of claim 11 wherein said first body further comprises a C-shaped yoke. 15. The hydropneumatic riveter of claim 11 wherein said first body further comprises a plurality of split conical jaws, said split jaws having a portion of an internal diameter with serrations, said piston of said first body further comprising a conical internal bore for interfacing with said split conical jaws. 16. The hydropneumatic riveter of claim 11 wherein said first body further comprises a first jaw and a second jaw, said first jaw and said second jaw oriented in the form of an alligator rivet squeezer. 17. The hydropneumatic riveter of claim 11 wherein the control comprises a control valve that is manually operated by a foot pedal, the control valve coupled to the second body by at least one supply tube. 18. A hydropneumatic riveter comprising a first body and a second body, said first body and said second body operably connected by a single, flexible conduit, said first body comprising a cylindrical bore into which a piston is installed for axially slideable engagement with said bore and acted on by a fluid, said piston oriented so as to move in a direction substantially perpendicular to a cylindrical axis of a fastener to be formed, said second body comprising a first piston and a second piston, said first piston having a substantially larger diameter than said second piston, said first piston actuated by a gas and acting on said second piston, said second piston compressing a fluid within said flexible conduit and said second body comprising a control for modulating said first piston. 19. The hydropneumatic riveter of claim 18 wherein said first body and said second body each further comprise a threaded bleed fitting, for selectively removing unwanted air from said fluid of said flexible conduit. 20. The hydropneumatic riveter of claim 18 wherein said first body and said flexible conduit each further comprise a portion of a fluid quick disconnect fitting for selectively coupling and uncoupling said first body from said flexible conduit.