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A kissing shield comprised of a thin, flexible membrane and a frame or holder.
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| Number | Title | Issue Date |
| 4502843 | Valveless free plunger and system for well pumping A rugged lightweight valveless plunger (38) is provided for use in a well pumping system of the free plunger type. The plunger (38) comprises an elongated cylindrical integral aluminum body (42) having a rigid sealing section (44) formed by a plurality of... | 03/05/1985 |
| 4432556 | Piston sealing arrangement for a cryogenic refrigerator A sealing arrangement for a rectilinear reciprocable piston within a cryoic refrigerator comprising a buffer defined by dual O-rings disposed around the circumference of the piston and containing pressurized gas of the same type as the refrigeration gas.... | 02/21/1984 |
| 4429620 | Hydraulically operated actuator A hydraulically operated actuator employs multiple metal-to-metal static seals to isolate the hydraulic fluid and to isolate the actuator from surrounding contaminating (ambient) fluids. A housing contains at least two linearly spaced apart chambers. A pi... | 02/07/1984 |
| 4367702 | Internal combustion engine with automatic compression release An internal combustion engine is illustrated having an engine block, a cylinder located in the engine block, and a cylinder head defining an end wall of the cylinder. A piston is housed in the cylinder and defines with the cylinder and the cylinder head a... | 01/11/1983 |
| 4322023 | Material moving apparatus A material moving apparatus, and in particular, a material moving pump such as a manure pump. The pump includes a pumping chamber defined by interior chamber walls, and a piston or ram mounted for reciprocation in the chamber. The ram has side walls gener... | 03/30/1982 |
| 4304410 | Sealing structure for reciprocating pistons exposed to high pressure differentials This invention effects a significant reduction in leakage along a piston reciprocating in a cylinder and having a high fluid pressure differential existing between one end of the piston and the other. A large number of closely spaced, annular grooves are ... | 12/08/1981 |
| 4294572 | Internal fluid communication system for power cylinders An internal fluid communication system in combination with a fluid operated power cylinder, such as that used on industrial lift trucks, in which a pair of tubular sections in telescopic relationship is disposed lengthwise within the power cylinder, formi... | 10/13/1981 |
| 4241644 | Pneumatic actuator A pneumatic actuator in which a piston and a cylinder define an annular gap therebetween axially connecting two portions of the cylinder cavity otherwise separated by the piston. When compressed air is admitted to one of the cavity portions, an O-ring in ... | 12/30/1980 |
| 4204456 | Pneumatic ejector for bomb A pneumatic ejector device suitable for use in an aerial bomb ejection system, in which pivotably operable jaws for gripping the bomb or other device are operatively interconnected to a pneumatically operated piston which engages with the bomb to effect p... | 05/27/1980 |
| 4197786 | Support jack more particularly adapted to support a tool holder of a machine tool and in particular of a polishing machine The support jack comprises a cylinder and a piston which define therebetween a variable-volume chamber. An inlet aperture and an outlet aperture for control fluid are provided for the chamber. Escape passageways are provided in evenly-spaced relation abou... | 04/15/1980 |
| 4190940 | Method of assembling an actuator A thermally sensitive actuator consists of a pressure cylinder comprising a tube, two end closure elements each secured to a respective end of the tube, a body of flowable material contained within the tube between the end closure elements, and a piston e... | 03/04/1980 |
| 4189985 | Fabric-lined epoxy resin cylinder with lubricant retaining grooves A woven seamless sleeve including axial yarns forms the inner face of an epoxy resin cylinder for an air operated linear actuator. Under certain conditions, a minute, internal, spiral groove develops in applying the resin. In the operation of the actuator... | 02/26/1980 |
| 4156584 | Liquid cryogen pump A liquid cryogen pump in which liquid is maintained on both sides of the pump piston during operation. In the preferred embodiment, vapor, when present in the pump chamber, is passed from in front to behind the piston by providing a predetermined clearanc... | 05/29/1979 |
| 4135723 | Piston rod seal A piston for use in a hydraulic or other fluid operated device having sealing means intended to prevent the passage of working fluid between the piston and cylinder in which it moves consisting of the combination of at least one O ring or other sealing de... | 01/23/1979 |
| 4124978 | Compressed air engine A compressed air engine having specially designed cylinder heads and piston configurations in order to reduce friction and maximize the application of air from a pressurized air source. The disclosure includes a lubrication system whereby the mechanical p... | 11/14/1978 |
| 4041924 | Reciprocating internal combustion engine An internal combustion engine comprises a cylinder having a horizontal axis, one end of the cylinder being formed as a combustion chamber and the other end opening into a crankcase receiving a lubricating atmosphere. A piston slidable in the cylinder has ... | 08/16/1977 |
| 3999894 | Compressor assembly A reciprocating piston assembly for a compressor is disclosed in that a piston with at least one groove formed in its outer surface is slidably mounted in a cylinder bore and at least one piston ring made of polymers of fluorine-containing olefin monomers... | 12/28/1976 |
| 3991835 | Pneumatic rock drill with peripheral piston clearance space A fluid operated reciprocating piston rock drill wherein the piston has a stem portion closely slidably received in a guide bushing and the cylinder of the rock drill provides clearance space around the head of the piston.... | 11/16/1976 |
| 3983788 | Method to minimize the amount of oil in the air exhausted from a pneumatically operated impact motor and an impact motor for carrying out this method An impact motor has a reciprocating piston that has its piston rod guided in bushings in the housing. The bushings are lubricated by oil-loaded compressed air but the piston is forced to reciprocate by oil-free compressed air.... | 10/05/1976 |
| 3971297 | Two cycle engine with peripheral bypass for piston head and method of manufacture The invention provides a bypass around virtually the entire periphery of a piston in a two cycle engine without substantially increasing costs or obsoleting production tooling. This is done by reshaping a cavity formed inside an engine casting to enlarge ... | 07/27/1976 |
