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An armor with rollers is provided that enables a user to move in all positions by rolling on a hard and smooth surface while constantly varying his bearing points on the ground.
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| Number | Title | Issue Date |
| 7367238 | Test apparatus using a pneumatic collet and method to clamp a bar A pneumatic collet assembly has a housing, a piston, a collet, and ball bearings. The piston is disposed within the housing. A bore within the piston receives the collet. The collet has a base and fingers. The fingers of the collet define a center channel or bore co... | 05/06/2008 |
| 7258348 | Machining fixture for centering and holding workpiece A centering and holding fixture includes a base, a piston disposed within a piston chamber at least partially located within the base, and a radially flexible ring connected to the piston by force transmission apparatus operable to contract and expand the radially f... | 08/21/2007 |
| 7147232 | Workpiece holder A workholding apparatus including a body and a drive member carried by the body, so that the drive member and body partially define a fluid chamber therebetween for containing a fluid. A driven member is also carried by the body and includes multiple displacement re... | 12/12/2006 |
| 6969073 | Chuck assembly with a sealing member A chuck assembly includes a housing formed with an hydraulic fluid inlet, a sleeve mounted in the housing and formed with an annular groove, a shaft mounted rotatably in the sleeve and formed with a first fluid passage, a chuck unit mounted in the shaft, a piston su... | 11/29/2005 |
| 6739326 | Semiconductor manufacturing equipment By preventing warping of chips when detaching individual chips from a dicing sheet, improvement in quality without cracks and in productivity is realized. A collet (115) used in a step of detaching chips (110) discretely divided as bonded to a dicing s... | 05/25/2004 |
| 6145849 | Disk processing chuck A memory disk having a central opening and planar sides for receiving magnetic media on both of the sides is bounded by a cylindrical outside diameter peripheral edge and chamfered edges extending between each of the planar sides. The peripheral edge is c... | 11/14/2000 |
| 5979267 | Clamping device An annular collet (10) is externally fitted to a support rod (4) inserted into a housing (2), and an annular transmission member (14) is arranged around the collet (10) with an annular tapered clearance (C) interposed therebetween. A large number of balls... | 11/09/1999 |
| 5743687 | Fourth axis fixture quick change A quick fixture changing apparatus for the fourth axis turn table of a machine tool. A pneumatic servomechanism exerts force on a drawbar, which is releasably attached to the fixture plate. The drawbar passes through the central opening of the turn table,... | 04/28/1998 |
| 5441284 | Fluid operated chuck and methods of operation Workpiece chucking apparatus includes a chuck body mounting a first plurality of prepositioning lock-up fingers and a second plurality of gripping fingers. The lock-up fingers are biased together radially outwardly or inwardly into engagement with a perip... | 08/15/1995 |
| 5429376 | Fluid-operated collet chuck with centering fingers A chuck for gripping workpieces to be machined has a chuck body with a workpiece support surface for supporting a workpiece to be machined. Generally radially movable centering and gripping collet fingers are concentrically supported by the chuck body. An... | 07/04/1995 |
| 5221098 | Collet closer A collet closer comprises a housing including a piston and a cylinder for collet opening and closing. A tubular member supported is in said housing and has an extension projecting from the housing. The tubular support member is secured to the piston and m... | 06/22/1993 |
| 4971339 | Collet type work driver A collet type work driver for holding and driving a workpiece which is located between work centers upon a grinder, lathe or similar machinery, is disclosed. The work driver includes a unique free-floating collet package which rotates essentially free fro... | 11/20/1990 |
| 4945819 | Clamping apparatus for the rotary spindle of a machine tool The chuck or collet actuating apparatus for a machine tool comprises a rotating clamping cylinder, an axially slidable clamping piston rotating with the clamping cylinder and a coaxial cylindrical projecting portion in the clamping cylinder. The projectin... | 08/07/1990 |
| 4836091 | Hydraulic work support A spring actuated plunger work support seeks variable tolerance level of workpiece and is hydraulically locked in place to provide resistance to workpiece deflection imposed by processing loads. A collet with independent steel segments in a molded rubber ... | 06/06/1989 |
| 4746252 | Spindle of a machine tool A spindle of a machine tool is mounted for rotation about a longitudinal axis. The spindle comprises clamping means for clamping and releasing a tool. An energy accumulator is charged when the tool is not clamped and is at least partly discharged to tight... | 05/24/1988 |
| 4630979 | Cartridge tool locking and unlocking device for toolholders Locking and unlocking device for cartridge-type tools used in a toolholder mounted on a machine tool ram comprises transmission apparatus (20) connected to control apparatus (24) and arranged to slide axially within a rotating block (23), said transmissio... | 12/23/1986 |
| 4580796 | Hydraulic clamping nut The invention relates to a hydraulic clamping means, in particular, a clamping nut, for mutual axial clamping of two workpiece sections or machine parts, in particular, a collet and a chuck, comprising an annular housing engaging one workpiece section or ... | 04/08/1986 |
| 4512072 | Apparatus for installing poultry feather picking fingers Apparatus for seating resilient fingers of a poultry feather picking machine has a housing 30 in which a sleeve 54 is reciprocally mounted that carries collet camming means 55. A collet 57 is slidably mounted in the sleeve 54 which has an annular array of... | 04/23/1985 |
| 4432559 | Hydraulic chuck having ring collet A hydraulic chuck for engagement of the outside of tubes. A set of ring collets are provided to grip the tube and hold it while the tube is tested, expanded, or otherwise worked on. Seals are provided to prevent fluid flow between the tube and the chuck. ... | 02/21/1984 |
| 4423880 | Hydraulic chuck An improved chuck utilizing a self-contained hydraulic system integrated to the spindle rotor to radially flex a thin walled diaphragm so as to grip a collet and a tool therein. Pressure in the hydraulic system is controlled by means of a plunger which is... | 01/03/1984 |
| 4398326 | Collet unclamping mechanism Pressurized hydraulic fluid for energizing the collet unclamping mechanism of a machining center is supplied through a first solenoid valve from an accumulator which is charged by a piston pump. The piston pump is attached to the machining center between ... | 08/16/1983 |
| 4387906 | Tool or workpiece chucking device A chucking device for tools or workpieces having a cylindrical or slightly conical chucking surface. The chucking device includes body (1), which is provided with truncated cone-shaped surface (3), cavity (4) located inside the surface and along a substan... | 06/14/1983 |
| 4347753 | Mechanism for operating a collet chuck In a draw-bar mechanism for moving the collet of a chuck or the like on a spindle of an automatic turning machine toward its axial clamping position and for thereafter closing the collet more slowly with greater force about a tool or workpiece to be clamp... | 09/07/1982 |
| 4317577 | Rotary expandable tool with hydraulic internal intensifier A relatively high fluid pressure actuated rotary arbor or chuck having internal pressure intensifying differential pistons for converting relatively low pressure from an outside supply through a relatively low pressure non-rotating coupling connection. A ... | 03/02/1982 |
| 4103914 | Drill chuck A drill chuck has a chuck body carrying a nonrotatable but axially displaceable tightening cone which displaces radially a plurality of angularly equispaced tool-engaging jaws. The tightening cone is axially shifted by a rotatable but axially fixed tighte... | 08/01/1978 |
| 4040338 | Fluid supply distributor A fluid supply distributor communicates fluid from a stationary fluid source to a rotating hydraulic motor. The distributor includes a housing with main ports for connection to high and low pressure at the source. A shaft rotating in the housing is attach... | 08/09/1977 |
