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US 4,878,284 AGranted
Hand held sheet metal joining system
AssigneeBTM Corporation
InventorEdwin G. Sawdon
Life of this patent
Estimating the term…
Abstract
A portable sheet metal joining apparatus is disclosed including a releasable tool carrying cartridge carried by a piston in a hand held gun which is powered by a booster of very compact design which uses standard compressed air to create high pressure hydraulic fluid to activate the gun.
Claims30
An apparatus for joining two or more overlapping sheets of metal, comprising:
- a housing;
- a punch and die mounted in said housing, said punch and die being aligned on a center axis and normally spaced apart a sufficient distance to receive said sheets therebetween;
- a piston movably mounted in said housing for driving said punch along said axis towards said die and against the sheets whereby the sheets are joined;
- and a cartridge releasably connected to said piston for movement therewith, said punch being carried by said cartridge.
1 more element
A fluid machine comprising:
- a cylinder;
- a first end plate sealingly disposed at one end of said cylinder;
- a second end plate sealingly disposed at the other end of said cylinder, said end plates and cylinder defining a fluid chamber;
- a piston mounted for reciprocation in said chamber;
- and a plurality of connectors interconnecting said end plates for clamping said cylinder therebetween against the pressure of fluid in said chamber, at least one of said connectors being tubular and providing a fluid passage between said end plates.
2 more elements
A portable apparatus for joining sheet metal comprising:
- hydraulically powered hand held punch means having tools for creating a sheet metal joint;
- a pneumatically powered intensifier for providing a hydraulic fluid at relatively high pressures;
- means on said intensifier for connecting same to a standard source of compressed air;
- tube means for communicating hydraulic fluid from said intensifier to said punch means;
- control means associated with said intensifier for controlling the supply of hydraulic fluid;
- and trigger means on said punch means for controlling the action of said controlling means.
3 more elements
Dependencies are inferred from the claim text.