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A self defense weapon formed as a memo pad and which is easily held by a person's fingers, therefore making it possible to provide protection from a mugger and also to quickly and easily write a record or a message without failure of missing or forgetting significant information under a stressful situation.
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| Number | Title | Issue Date |
| 7291565 | Method and system for treating a substrate with a high pressure fluid using fluorosilicic acid A method and system is described for treating a substrate with a high pressure fluid, such as carbon dioxide in a supercritical state. A process chemistry is introduced to the high pressure fluid for treating the substrate surface. The process chemistry comprises fl... | 11/06/2007 |
| 7255772 | High pressure processing chamber for semiconductor substrate A high pressure chamber comprises a chamber housing, a platen, and a mechanical drive mechanism. The chamber housing comprises a first sealing surface. The platen comprises a region for holding the semiconductor substrate and a second sealing surface. The mechanical... | 08/14/2007 |
| 7250374 | System and method for processing a substrate using supercritical carbon dioxide processing A method and system for processing a substrate in a film removal system. The method includes providing the substrate in a substrate chamber of a film removal system, where the substrate has a micro-feature containing a dielectric film on a sidewall of the micro-feat... | 07/31/2007 |
| 7168928 | Air driven hydraulic pump An air driven hydraulic pump includes two opposed cylinders to either side of a center section. Two pneumatic pistons are slidable in the opposed cylinders and are coupled with one another by a common shaft extending through the center section. The pneumatic pistons... | 01/30/2007 |
| 7140393 | Non-contact shuttle valve for flow diversion in high pressure systems A valve for redirecting flow in a supercritical fluid or other high pressure processing system is disclosed. In high pressure supercritical carbon dioxide (SCCO2) equipment for semiconductor wafer processing, a major hurtle in providing clean equipment and clean waf... | 11/28/2006 |
| 7125229 | Reciprocating air distribution system A reciprocating air distribution system includes a valve housing, having a cylinder therein. A valve element is slidably mounted within the cylinder. Also provided is an inlet to the cylinder, an exhaust from the cylinder and air distribution passages which are cont... | 10/24/2006 |
| 6951163 | Shaft coupling and shifting mechanism for pneumatic pump Fluid pump assembly driven by a reciprocating piston, having an improved coupling between a driving shaft and a driven shaft and a fast-shifting switching mechanism for changing the direction of movement to the piston. ... | 10/04/2005 |
| 6800383 | Tungsten carbide coating and method for producing the same New tungsten carbides alloyed with fluorine in amounts up to 0.5 wt % and possibly with fluorocarbon compositions are described. It is possible to produce them by means of a new process of chemical vapor deposition, in which tungsten hexafluoride, hydrogen and a car... | 10/05/2004 |
| 5778753 | Pneumatic or hydraulic cylinders A pneumatic or hydraulic cylinder assembly (10) includes a cylinder (10), a piston (12) axially slidable within the cylinder (10), and structural elements are disposed within the cylinder (10) to issue a piston (12) position signal in response to the pist... | 07/14/1998 |
| 5538042 | Air driven device An air driven diaphragm pump having two diaphragms joined by a common control shaft to reciprocate in opposed chambers for pumping material through check valve ported cavities. An actuator valve is associated with the central housing of the pump and inclu... | 07/23/1996 |
| 5173035 | Reciprocating pump In the preferred and illustrated embodiment of a reciprocating pump, a plunger for pumping a liquid, a piston for reciprocating the plunger and a selector valve for changing a pilot flow passage between a supply passage communicating a pressure chamber wi... | 12/22/1992 |
| 5055007 | Over-ride valve assembly for air operated double diaphragm pumps An over-ride valve assembly is mounted between the actuator valve and center section of an air operated double diaphragm pump to provide normal communication between the actuator valve and the center section of the pump during normal operation of the pump... | 10/08/1991 |
| 5050482 | Apparatus for driving piston by fluid pressure An apparatus for driving a piston by fluid pressure in which a piston (8) is reciprocated upward and downward by supplying and discharging pressure fluid to and from an actuation chamber (9) disposed in a cylinder (7) through a pilot valve (18) and a flui... | 09/24/1991 |
| 4949622 | Fluid operable engine A fluid operable engine has a cylinder in which a piston slides up and down. The cylinder has a cylindrical wall and two end walls. The piston divides the cylinder into two chambers. The piston is hollow, has a cylindrical wall and two end walls, with a r... | 08/21/1990 |
| 4915013 | Control valve means for pressurized air-operated devices for driving fasteners into workpieces Control valve means for a driving tool operated with compressed air for the driving of fasteners into workpieces. Through a specific design of the main and the auxiliary valve and through a connection to the piston return chamber the control of the valves... | 04/10/1990 |
| 4800797 | Hydraulic percussion device and method of controlling same A hydraulic percussion device comprises a housing defining a longitudinal cylinder, a piston longitudinally reciprocal in the cylinder and subdividing same into a front compartment and a rear compartment, and a tool engageable longitudinally with the pist... | 01/31/1989 |
| 4645431 | Hydraulic pumping apparatus and method of operation A hydraulically actuated pumping apparatus including a piston-driven, plunger-type injection pump in combination with a three-way normally closed pilot-operated relay valve, and a variable restrictor adjustable during operation of the pumping apparatus fo... | 02/24/1987 |
| 4549467 | Actuator valve An air driven diaphragm pump having an actuator valve for converting a source of compressed air into a reciprocating drive. The actuator valve includes a valve piston for alternately directing air to one side or the other of the pumps, a control rod fixed... | 10/29/1985 |
| 4456438 | Extrusion device for impregnating a rock formation, preferably for bonding with a liquid synthetic product The invention concerns an extrusion device for impregnating rock formations preferably for bonding with a liquid synthetic product, with the use of a piston pump having at least one working cylinder. During the induction or suction stroke a working piston... | 06/26/1984 |
| 4449896 | Hydraulic operated surface pumping unit The hydraulic operated surface pumping unit of this invention is a counterbalanced cross beam type pumping unit driven by a hydraulic cylinder. The pumping unit can be operated in a first mode of equal upstroke and down stroke speeds or in a second mode o... | 05/22/1984 |
| 4434705 | Introduced in the hydraulic actuation for the alternative movements of the swinging arms of petroleum extractor machines A reciprocable drive mechanism has a fluid pressure operable ram controlled by a spool valve, a two-position valve and a braking valve. During a powered stroke of the ram, the spool valve closes an exhaust path of the two-position valve so that the latter... | 03/06/1984 |
| 4405292 | Pneumatically controlled rate pump A pneumatic pump includes a pneumatic cycling mechanism that permits the commencement of each successive pumping interval only upon the appearance of a pilot signal. The pilot signal is generated by a pneumatically operated pump timer that determines the ... | 09/20/1983 |
| 4339985 | Air driven reciprocating device An actuator valve for an air driven reciprocating device wherein the valve includes a control rod responsive to movement of the reciprocating device and a valve piston pneumatically actuated by movement of the control rod. The valve piston selectively dir... | 07/20/1982 |
| 4242941 | Actuator valve An actuator valve for an air driven reciprocating device wherein the valve includes a control rod responsive to movement of the reciprocating device and a valve piston pneumatically actuated by movement of the control rod. The valve piston selectively dir... | 01/06/1981 |
| 4227442 | Cylinder control device of hydraulic cylinder apparatus A cylinder control device of a hydraulic cylinder apparatus including a two-position, directional control valve having a pilot chamber for effecting control of reversal of the direction of movement of a piston, and a control valve movable between two posi... | 10/14/1980 |
| 4181066 | Expansible chamber motor An air motor comprising a cylinder, a piston, and a valve mechanism for controlling the supply and exhaust of air to and from opposite ends of the cylinder, the valve mechanism comprising a D-valve and an actuator for the D-valve operable by the pressure ... | 01/01/1980 |
| 4172411 | Hydraulic hammer A hydraulic hammer wherein the reciprocal motion of a drill-striking piston is operated by means of a spool valve for switching hydraulic pressure to a double-acting cylinder depending upon the position of the piston. The hydraulic hammer further includes... | 10/30/1979 |
| 4123204 | Double-acting, fluid-operated pump having pilot valve control of distributor motor A reciprocating, fluid operated pump, which is reversed at opposite ends of its travel by shifting of a directional valve, is characterized by a control valve for rapidly and completely shifting the directional valve. In the disclosed embodiment, the pump incl... | 10/31/1978 |
| 4104008 | Pump having fluid-actuated motor controlled by fluid-actuated distributor A fluid-actuated, such as a pneumatically actuated, hydraulic pump of either the single acting or the double acting type is controlled in its operation by a main valve member which has two connecting compartments the fluid in one of which is always at the... | 08/01/1978 |
| 4085655 | Control for reciprocating pumps or the like A control valve for alternately applying fluid pressure to two drive members of a reciprocating work device such as a pump. A valve piston is slideable in a closed cylinder to which pressurized fluid is transmitted. The valve piston, controls the fluid de... | 04/25/1978 |
| 3963383 | Air driven pump The device is an air driven piston in a cylinder driving a pump. A shuttle valve is provided to control the admission of air under pressure to, and exhaust from the cylinder. The shuttle valve is a double ended piston operating in coaxial bores with a ste... | 06/15/1976 |
