US3566978A — Apparatus for driving anchoring elements for a pr…

Claim 1

Independent Claim 317 words

Apparatus for driving anchoring elements such as bolts, studs, and nails into a hard target material such as iron, concrete and the like to obtain a predetermined reproducible depth of penetration of the anchoring elements, comprises a housing member, a hammer piston axially displaceably mounted within said housing member for driving anchoring elements into the target material in response to an explosive force acting on said hammer piston, means mounted within said housing and arranged for receiving energy from said hammer piston, a stop member mounted within said housing and in contact with said means within said housing member, said stop member is elastically deformable and is arranged to be in frictional contact with said hammer piston when said hammer piston has a effected the predetermined depth of penetration of the anchoring elements and said stop member also being in bearing contact with said means when it is in frictional contact with said hammer piston, resilient means being positioned within said housing member for mounting said means in axially displaceable relationship within said housing member, said resilient means comprises a plurality of inner rings and a plurality of outer rings disposed within said housing member and being concentrically arranged about the axis of said hammer piston, said inner and outer rings being arranged in alternating arrangement with the outer faces of said inner rings being in frictional contact with the inner faces of said outer rings, whereby upon achieving the desired depth of penetration of the anchoring element said hammer piston contacts said stop member and the energy from the explosive force in excess of that required for inserting the anchoring element is transformed at least in part into thermal energy by the frictional contact between said stop member and said hammer piston and the portion of the energy not converted into thermal energy is transmitted from said stop member to said means within said housing member.

Claim 2

Dependent Claim 317 words

Apparatus for driving anchoring elements such as bolts, studs, and nails into a hard target material such as iron, concrete and the like to obtain a predetermined reproducible depth of penetration of the anchoring elements, comprises a housing member, a hammer piston axially displaceably mounted within said housing member for driving anchoring elements into the target material in response to an explosive force acting on said hammer piston, means mounted within said housing and arranged for receiving energy from said hammer piston, a stop member mounted within said housing and in contact with said means within said housing member, said stop member is elastically deformable and is arranged to be in frictional contact with said hammer piston when said hammer piston has a effected the predetermined depth of penetration of the anchoring elements and said stop member also being in bearing contact with said means when it is in frictional contact with said hammer piston, resilient means being positioned within said housing member for mounting said means in axially displaceable relationship within said housing member, said resilient means comprises a plurality of inner rings and a plurality of outer rings disposed within said housing member and being concentrically arranged about the axis of said hammer piston, said inner and outer rings being arranged in alternating arrangement with the outer faces of said inner rings being in frictional contact with the inner faces of said outer rings, whereby upon achieving the desired depth of penetration of the anchoring element said hammer piston contacts said stop member and the energy from the explosive force in excess of that required for inserting the anchoring element is transformed at least in part into thermal energy by the frictional contact between said stop member and said hammer piston and the portion of the energy not converted into thermal energy is transmitted from said stop member to said means within said housing member.

Claim 3

Dependent Claim 72 words

Apparatus, as set forth in claim 1, wherein the outer faces of said inner rings and the inner faces of said outer rings are tapered relative to the axial direction of said hammer piston and the tapered faces of each of at least a number of said inner rings and said outer rings being in frictional contact with the similarly tapered surface of the adjacent ones of outer and inner rings respectively.

Claim 4

Dependent Claim 104 words

Apparatus, as set forth in claim 2, wherein said resilient means comprises a sleeve located within said housing member and spaced inwardly from the inner surface of said inner rings, a radially outwardly extending flange secured to the forward end of said sleeve in the firing direction of the apparatus and extending outwardly into sliding contact with the inner surface of said housing member, at the rearward end of the alternating said inner and outer rings the rearward one thereof contacting said member and at the forward end of said inner and outer rings the forward one thereof contacting said flange on said sleeve.

Claim 5

Dependent Claim 30 words

Apparatus, as set forth in claim 3, wherein an axially displaceable guide member being located in the forward end of said housing member in the firing direction of said apparatus.

Claim 6

Dependent Claim 50 words

Apparatus, as set forth in claim 4, wherein said resilient means comprises a first helical spring extending between said sleeve and the inner surface of said housing member at its forward end, and a second helical spring extending between said member at the forward end thereof and said guide member.

Claim 7

Dependent Claim 289 words

Apparatus for driving anchoring elements such as bolts, studs, and nails into a hard target material such as iron, concrete and the liKe to obtain a predetermined reproducible depth of penetration of the anchoring elements, comprises a housing member, a hammer piston axially displaceably mounted within said housing member for driving anchoring elements into the target material in response to an explosive force acting on said hammer piston, means mounted within said housing and being arranged for receiving energy from said hammer piston, a stop member mounted within said housing and in contact with said means within said housing member, said stop member is elastically deformable and is arranged to be in frictional contact with said hammer for when said hammer piston has effected the predetermined depth of penetration of the anchoring elements and said stop member also being in bearing contact with said means when it is in frictional contact with said hammer piston, said stop member comprises a first annular part and a second annular part, said second annular part being disposed within said first annular part and located at the end thereof extending in the firing direction of the apparatus, said first and second annular parts having axial arranged-openings therethrough for receiving said hammer piston, whereby upon achieving the desired depth of penetration of the anchoring element said hammer piston contacts said stop member and the energy from the explosive force is excess of that required for inserting the anchoring element is transformed at least in part into thermal energy by the frictional contact between said stop member and said hammer piston and the portion of the energy not converted into thermal energy is transmitted from said stop member to said means within said housing member.

Claim 8

Dependent Claim 289 words

Apparatus for driving anchoring elements such as bolts, studs, and nails into a hard target material such as iron, concrete and the liKe to obtain a predetermined reproducible depth of penetration of the anchoring elements, comprises a housing member, a hammer piston axially displaceably mounted within said housing member for driving anchoring elements into the target material in response to an explosive force acting on said hammer piston, means mounted within said housing and being arranged for receiving energy from said hammer piston, a stop member mounted within said housing and in contact with said means within said housing member, said stop member is elastically deformable and is arranged to be in frictional contact with said hammer for when said hammer piston has effected the predetermined depth of penetration of the anchoring elements and said stop member also being in bearing contact with said means when it is in frictional contact with said hammer piston, said stop member comprises a first annular part and a second annular part, said second annular part being disposed within said first annular part and located at the end thereof extending in the firing direction of the apparatus, said first and second annular parts having axial arranged-openings therethrough for receiving said hammer piston, whereby upon achieving the desired depth of penetration of the anchoring element said hammer piston contacts said stop member and the energy from the explosive force is excess of that required for inserting the anchoring element is transformed at least in part into thermal energy by the frictional contact between said stop member and said hammer piston and the portion of the energy not converted into thermal energy is transmitted from said stop member to said means within said housing member.

Claim 9

Dependent Claim 131 words

Apparatus, as set forth in claim 6, wherein the interior surface within the opening through said first annular part having a first frustoconically shaped surface extending from the rearward end of said first annular part in the firing direction of the apparatus toward the forward end of said housing member, a second frustoconically shaped surface extending from said first surface in the firing direction of said apparatus, said first frustoconically shaped surface converging in the firing direction and said second frustoconically shaped surface diverging in the firing direction, s and said second annular part having a frustoconically shaped outer surface arranged to engage said second frustoconically shaped surface of said first annular part, the forward end of said second annular part in the firing direction being in contact with same member.

Claim 10

Dependent Claim 68 words

Apparatus, as set forth in claim 7, wherein said means comprising a member mounted in said housing member to be axial displaceable therein, said member having an axially arranged recess in the end thereof directed away from the firing direction of the apparatus, said stop member being spaced within and radially inwardly from the recess in said member for permitting widening of said stop member within said recess.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1974-03-01	1974-08-31	1975-03-02	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1978-03-01	1978-08-31	1979-03-02	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1982-03-01	1982-08-31	1983-03-02	$7700.00	Window Closed / Lapsed

Apparatus for driving anchoring elements for a predetermined depth of penetration

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