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US 5,687,898 AGranted
Fixing apparatus with a compressed gas-powered piston
AssigneeSociete De Prospection Et D'Inventions Techniques Spit
InventorBruno Toulouse
Life of this patent
Estimating the term…
Abstract
The gas admitted into the combustion chamber (10) is compressed by relative sliding of the cylinder (3) and the sleeve (4). Ignition is effected by a spark plug (13). During compression, the piston (35) is fixed in position by a retaining ring (32). The cylinder (3)/sleeve (4) assembly is connected to the housing (1) of the apparatus by return springs. The apparatus is very suitable for fastening straps to steel or concrete.
Claims24
Apparatus for securing an element within a substrate, comprising:
- a housing having a longitudinal axis;
- a sleeve member disposed within said housing;
- a combustion chamber defined within said sleeve member;
- a cylinder disposed within said sleeve member;
- a guide member, for gliding an element as said element is being driven by said apparatus into a substrate, fixedly attached at one end thereof to said cylinder and having a second end thereof for engaging a substrate;
- and
- a piston axially movable within said cylinder for movement between a first ready position at which said piston is disposed so as to subsequently drive an element, disposed within said guide member, into a substrate, and a second fired position at which said piston drives an element, disposed within said guide member, through said guide member and into a substrate;
- said cylinder being axially movable within said sleeve member, as a result of said guide member engaging said substrate, between a first position at which said cylinder cooperates with said sleeve member so as to sealingly close one end of said combustion chamber, and a second position at which said cylinder continues to cooperate with said sleeve member so as to maintain said one end of said combustion chamber sealed closed and reduces the volume of said combustion chamber prior to ignition of a combustible charge within said combustion chamber so as to increase the combustion power developed within said combustion chamber and imparted to said piston, and an element driven thereby, when a combustible charge is ignited within said combustion chamber.
5 more elements
Apparatus for securing an element within a substrate, comprising:
- a housing having a longitudinal axis;
- a sleeve member disposed within said housing;
- a combustion chamber defined within said sleeve member;
- a cylinder axially movable within said sleeve member between a first position at which said cylinder cooperates with said sleeve member so as to sealingly close one end of said combustion chamber, and a second position at which said cylinder continues to cooperate with said sleeve member so as to maintain said one end of said combustion chamber sealed closed and reduces the volume of said combustion chamber prior to ignition of a combustible charge within said combustion chamber so as to increase the combustion power developed within said combustion chamber, for driving an element into a substrate, when a combustible charge is ignited within said combustion chamber;
- a piston axially movable within said cylinder for movement between a first ready position at which said piston is disposed so as to subsequently drive an element into a substrate, and a second fired position at which said piston drives an element into a substrate;
- and
- a guide member, for guiding an element as said element is being driven by said piston into a substrate, fixedly attached at one end thereof to said cylinder and having a second end thereof for engaging a substrate, into which an element is to be driven, so as to axially move said cylinder to said first and second positions with respect to said sleeve member in response to said second end of said guide member engaging a substrate and said housing of said apparatus being moved toward said substrate.
4 more elements
Apparatus as set forth 12, further comprising:
- means interconnecting said cylinder and said sleeve member such that said sleeve member is engaged with said cylinder head so as to close said second end of said combustion chamber prior to said cylinder moving to said first position at which said cylinder cooperates with said sleeve member so as to sealingly close said one end of said combustion chamber prior to ignition of a combustible charge within said combustion chamber, and for moving said cylinder relative to said sleeve member so as to open said one end of said combustion chamber prior to disengagement of said sleeve member from said cylinder head, so as to open said second end of said combustion chamber, subsequent to ignition of a combustible charge within said combustion chamber and movement of said piston to said second fired position.
Apparatus for securing an element within a substrate, comprising:
- a housing having a longitudinal axis;
- a sleeve member disposed within said housing;
- a combustion chamber defined within said sleeve member;
- a cylinder disposed within said housing;
- a piston axially movable within said cylinder for movement between a first ready position at which said piston is disposed so as to subsequently drive an element into a substrate, and a second fired position at which said piston drives an element into a substrate;
- means mounting said cylinder within said housing for axial movement with respect to said sleeve member between a first position at which said cylinder cooperates with said sleeve member so as to sealingly close one end of said combustion chamber, and a second position at which said cylinder continues to cooperate with said sleeve member so as to maintain said one end of said combustion chamber sealed closed and reduces the volume of said combustion chamber prior to ignition of a combustible charge within said combustion chamber so as to increase the combustion power developed within said combustion chamber, and imparted to said piston for driving an element into a substrate, when a combustible charge is ignited within said combustion chamber;
- and
- a guide member, for guiding an element as said element is being driven by said piston into a substrate, fixedly attached at one end thereof to said cylinder and having a second end thereof for engaging a substrate, into which an element is to be driven by said piston, so as to axially move said cylinder to said first and second positions with respect to said sleeve member in response to said second end of said guide member engaging a substrate and said housing of said apparatus being moved toward said substrate.
5 more elements
Dependencies are inferred from the claim text.