Matches 1 - 50 out of 126 1 2 3 >
Match Document Document Title
7343989 Secondary retainer for a downhole hammer bit  
A bit retainer system is disclosed. The bit retainer system includes a bit having a head and a shank, a driver sub disposed around the shank of the bit and adapted to engage a hammer case, a bit...
7284622 Tool holder for hammer  
A tool holder for a hammer comprises a tool holder body having a forward end for non-rotabably receiving a shank of a tool. The tool holder body defines an axially extending slot. A locking body...
7207633 Scaling assembly  
A scaling apparatus comprises a hammer component and a pick component which includes a tooth. The apparatus also includes a mechanism for moving the pick component with respect to the hammer...
7143840 Impact tool  
An impact tool enables a front cover part to be easily attached to and detached from a housing body, with a device having a simplified structure. The front cover part has an annular fastening...
7013986 Impact tool  
An impact tool enables a front cover part to be easily attached to and detached from a housing body, with a device having a simplified structure. The front cover part has an annular fastening...
6789632 Rock drilling apparatus  
A rock drilling apparatus includes a drill string terminating in a drill chuck ( 32 ) and a drill bit ( 16 ) detachably fitted into the drill chuck, the drill bit having a shank ( 18 ) received in...
6732814 Rock drilling machine  
A rock drilling machine comprising a rotating device ( 1 ), a percussion device ( 2 ) and a shank ( 17 ) where a tool ( 18 ) is to be fastened. According to the inventive idea, lubricant used for...
6467321 Device for ultrasonic peening of metals  
A device for ultrasonic peening of metals is intended for strengthening and relaxation treatment of metal surfaces with an ultrasonic oscillation and includes an ultrasonic generator ( 1 ) having...
6328116 Arrangement in connection with a hydraulic breaking apparatus  
The invention relates to an arrangement in connection with a hydraulic breaking apparatus, the arrangement comprising a housing (4) placed around a percussion hammer (1), and a changeable wearing...
6056070 Hydraulic ramming apparatus  
A hydraulic ramming apparatus including an apparatus body (14) having a cylinder bore (23) and a guide bore (24) that are successively formed to each other in the apparatus body (14). A piston (30)...
5996708 Percussion tool  
A percussion tool, such as a drill or a chisel tool, including a percussion mechanism (7), a tool chuck (1), and a damping member (8) arranged between the tool chuck (1) and the percussion...
5871059 Mechanism for preventing idling strikes in power-driven striking tools  
The present invention realizes effective recoil reduction and idling strike prevention with a minimum constitution. In a tool holder (6), a thermal-resistant O-ring (22) is arranged between two...
5735358 Indexing percussive drilling bit  
A chuck and drill bit combination for insertion into a front end of a percussive, down the hole drill forming a part of a cluster drill assembly, for selectively engaging and disengaging the chuck...
5350025 Nonrotary piston for jackhammer and removable splined nut therefor  
A fluid-activated, percussive impact tool has a piston therein that reciprocates longitudinally but not rotationally. The piston activates a wrap spring clutch to rotate the drill steel. A...
5226487 Pneumopercussive machine  
A self-propelled, pneumopercussive, cyclic action, ground penetrating machine (200) has decreased energy consumption and increased average working velocity compared to conventional machines. This...
5161624 Tool for driving fastening elements into hard receiving materials  
Tool for driving fastening elements into a hard receiving material, such as concrete, masonry, rock and the like, has a first device (1) for drilling a fastening element into the hard material and...
5125462 Quick-change ram boring head  
In a ram boring machine that has a striking piston reciprocating in a tubular housing and a striking tip that may be formed as a chisel and projects from the housing, connection of the striking tip...
5090487 Drill head with integral impact hammers  
A drill head is disclosed, for use to drill a hole in a front of hard material such as rock, which comprises a main body acting at a central support, an upwardly projecting spindle secured on top...
5050687 Compression-vacuum action percussive machine  
A compression-vacuum action percussive machine is proposed, which has a casing (1) accommodating a tool (7) and a cylinder (2) with a drive piston (3) and a striker (4) having a chamfer (10) on the...
5031706 Pneumopercussive soil penetrating machine  
A self-propelled, pneumopercussive, cyclic action, ground penetrating machine (200) has decreased energy consumption and increased average working velocity compared to conventional machines. This...
4930584 Cracking device  
A cracking device for use in a dredger includes a housing body having an elongated cavity receiving an elongated piston and a hammer rod to be struck by the piston. The cavity forms a gas chamber...
4906049 Ripper using a hydraulic hammer and a method for making the improvement  
An improved ripper using a hydraulic hammer with a rotating long service life hammer tool is provided. The tool is cylindrical with a large cylindrical upper portion and a central portion of...
4886128 Ram boring implement having a movable bit  
A ram boring implement having a pneumatically or hydraulically driven percussion piston, movable axially in a reciprocating manner in a housing, and an axially movable bit which is connected to an...
4884642 Percussive action machine  
A percussive action machine for changing the shape of solids objects comprises a housing (1) accommodating a hammer (2) capable of reciprocations. A tail piece (3) of the hammer (2) is disposed...
4860835 Diesel type pile-driver  
A diesel type pile-driver has a cup-shaped monkey (36) accommodated in a sliding fit on the external face of the lower end of the cylinder.
4815193 Rivet installation tool and method of installing rivets  
A tubular sleeve clamps the work during a drilling step, following which a tubular anvil moves within the sleeve to support the work while a rivet is thrust into the work with an interference fit....
4690226 Hammer drill  
A hammer drill has clamping jaws which are provided, in addition to clamping surfaces for radial clamping a cylindrical tool shaft, also with additional axially extending guiding surfaces for...
4669553 Percussion tool  
A percussion tool utilizing a reciprocatory piston movement for applying an impact force on to a working surface including a casing (1) having disposed axially therein a hammer member (12), an...
4646852 Pneumatic mallet  
A hand tool in the form of a pneumatically actuated mallet. The tool comprises a conventional pneumatic motor of the type employed in pneumatic fastener driving tools, including a tool body having...
4632190 Pneumatically-operated multi-needle chisel tool  
A pneumatically-actuated multi-needle type chisel tool is provided having a hollow cylinder body, a piston ram fitted for axially reciprocal movement in a rearward portion of the cylinder body, an...
4624325 Apparatus for dampening the recoil of percussion tools  
A percussion tool comprising a housing; a tool bit movably supported by the housing for alternatingly executing forward and recoil strokes; a hammer piston supported in the housing and arranged for...
4614241 Impact tool assembly with bit isolating means  
A foot assembly for an impact tool reduces tool bit rebound shock to the operator and minimizes tool bit bouncing on the work surface by isolating and attenuating energy reflected from the work...
4545440 Attachment for pneumatic hammers for punching holes of varying size  
A device for punching holes of varying size in sheet metal by a pneumatic hammer. A tapered punch is employed with an adjustment at the muzzle end of the hammer which selectively limits the travel...
4523647 Power hammer  
A power hammer for driving piles and the like which includes a housing having a ram carried therein for reciprocating vertical movement to strike, during its downward movement, an anvil slidably...
4512692 Tool shaft for a tool of the percussive and rotative type  
A tool shaft, especially for drills of the percussive type, such as hammer drills, is adapted to be mounted in a tool holder having fixed driving elements, and the shaft is therefore provided with...
4491445 Tool holder for hammer drills  
In a tool holder for securing a tool in a hammer drill in a form-locking manner, locking elements are radially displaceably mounted in a guide member. An adjustment ring is threaded onto the guide...
4476941 Motor-driven hand-held percussion tool  
A hand-held motor-driven percussion tool comprises a piston driven over an air cushion and acting over an axially movable anvil on the inner end of a tool axially movable in a tool receiver...
4442906 Percussive drills  
A percussive drill has a bit holder, a percussive drive including a ram slidably mounted in a hollow piston, and a drive transmission for reciprocating the ram in the piston via an air cushion. The...
4434859 Hammer drill for performing rotary drilling or percussive drilling  
A hammer drill for performing percussive drilling or rotary drilling includes a housing and a tool holder mounted on and axially displaceable relative to the housing, the tool holder contains a...
4378054 Taphole opening apparatus for blast furnaces  
The operator of a taphole drilling apparatus for blast furnaces performs manual changes on the apparatus in its safe position of rest and operation by remote control and automatic latching in...
4340120 Annular casing hammer  
A casing hammer for simultaneously driving casing and drilling a water well comprises a housing having an annular pneumatic chamber with an annular piston that drives an annular anvil which seals...
4315550 Self-propelled apparatus for setting cemetery markers and the like  
A wheeled, self-propelled apparatus has a percussion tool or hammer mounted on its forward end and an impact transmitting means carried on the tractor below the hammer. The impact transmitting...
4290489 Vibrationless pneumatic tools  
A pneumatic system includes a pneumatic motor, which may take the form of a vibrationless paving breaker utilizing a blow-striking member or hammer that is propelled to and from its...
4257488 Guide frame for a pile driving device  
A guide framework for guiding a hammer in driving piles into subaqueous ground, said framework comprising a socket slidingly engaging the pile by means of a passage and at least one guide stay...
4239143 Driver assembly for small-diameter fasteners  
A driver assembly for reliably driving relatively small-diameter washered and nonwashered fasteners from an indirect-acting powder-actuated tool comprises an adapter, carried on the muzzle end of...
4232752 Method and apparatus for driving pipe  
A casing hammer for driving casing while drilling a water well comprises a housing having an annular pneumatic chamber with a relatively lightweight, short-stroke annular piston. The piston is...
4171024 Power hammer  
A power hammer having an elongated hammer element disposed in a tubular housing for reciprocating motion therein and having a cylindrical cam concentrically mounted with respect to the tubular...
4131165 Hammer drill  
A hammer drill has a movable tool and a driving element substantially coaxial with the tool. The driving element directly transmits axial impact from the same to the tool without transmission of...
4119159 Pile driving apparatus  
The combination of a pile driving apparatus having a hammer operating mechanism mounted above a downwardly extending pile sleeve having an internal cross-section dimensioned to receive the top of a...
4102410 Resilient work-coupled impact device  
An impact device, incorporating power drive means having a resilient drive element for generating successive ram impacts against a tool by reaction of the resilient drive element against the device...
Matches 1 - 50 out of 126 1 2 3 >