214 results about "Cylinder seal" patented technology

A needle set for a biopsy device is disclosed. The needle set includes an outer member, a cylinder lumen within said outer member, an inner member having a cannula and an inner lumen. The inner member is slidably disposed within the cylinder lumen. The biopsy device also includes a cylinder seal member that is disposed within the cylinder lumen and a cannula seal member attached to the outer surface of the cannula. The cylinder seal member and the cannula seal member define a vacuum chamber therebetween.

A hydraulic pump includes a hydraulic cylinder assembly comprising a cylinder sealed by an upper head and a lower head and carrying a piston which divides the hydraulic cylinder assembly into an upper chamber and a lower chamber. A load is connected to the piston and urges it toward the lower head. A conduit connects a reversible hydraulic pump assembly in fluid flow communication with a pressurized supply of hydraulic fluid and the lower chamber for counterbalancing the load. A control system is operably associated with the reversible hydraulic pump assembly to cause hydraulic fluid to flow back and forth between the lower chamber of the hydraulic cylinder assembly and the pressurized supply of hydraulic fluid. A system is also provided to counteract leakage in the pump by adding hydraulic fluid makeup on an as needed and controlled basis.

The invention relates to a multi-layer multi-group airbag air distributor which comprises air transportation pipelines, airbag fixing device fixing pressing plates, air distributor upper cover retaining screws, a mounting rack fixing iron plate, a signal connecting line, electric detonator mounting racks, electric detonators, a firing pin mounting rack, firing pins, air cylinder sealing pieces, multiple groups of small air cylinders and the like. The multi-layer multi-group airbag air distributor is made of thick iron plates and composed of an upper portion and a lower portion, and the shape of the multi-layer multi-group airbag air distributor is a flat square. Air outlets of the multi-layer multi-group airbag air distributor are connected with automobile safety initiative multi-layer multi-group outer anti-collision airbags through the air transportation pipelines. A rectangular iron plate is installed in the middle of the air distributor to be used as the mounting rack fixing iron plate which is used for fixing the electric detonator mounting racks, the electric detonators, the firing pin mounting rack, the firing pins and locking recoil generated by the electric detonators during explosion. The air cylinder sealing pieces and air cylinder air transportation pipelines are arranged between the firing pins and the small air cylinders. Air inlets of the air distributor are connected with the multiple groups of small air cylinders through the air transportation pipelines, and the air inlets of the air distributor are separated from the small air cylinders through the air cylinder sealing pieces which are used for sealing high-pressure air in the small air cylinders. The air cylinder sealing pieces are installed on the rear wall of the air distributor, and the small air cylinders are also connected to the rear wall of the air distributor through the air transportation pipelines. The multi-layer multi-group airbag air distributor works through the small air cylinders filled with the high-pressure air and installed on the rear wall of the multi-layer multi-group airbag air distributor.

A hydraulic pump includes a hydraulic cylinder assembly comprising a cylinder sealed by an upper head and a lower head and carrying a piston which divides the hydraulic cylinder assembly into an upper chamber and a lower chamber. A load is connected to the piston and urges it toward the lower head. A conduit connects a reversible hydraulic pump assembly in fluid flow communication with a pressurized supply of hydraulic fluid and the lower chamber for counterbalancing the load. A control system is operably associated with the reversible hydraulic pump assembly to cause hydraulic fluid to flow back and forth between the lower chamber of the hydraulic cylinder assembly and the pressurized supply of hydraulic fluid. A system is also provided to counteract leakage in the pump by adding hydraulic fluid makeup on an as needed and controlled basis.

The invention provides a device for a remotely-operated vehicle (ROV) to quickly mount and replace a sensor on a deepwater platform anchor chain underwater and belongs to ocean platform equipment. By adopting the device, unmanned mounting and replacing of the sensor on the deepwater platform anchor chain can be achieved through the ROV. The device comprises an upper frame, a lower frame, a sensor bearing and positioning cylinder and a locking mechanism, wherein the upper frame and the lower frame are fixed to the anchor chain through the locking mechanism; the sensor bearing and positioning cylinder is matched with the upper frame in a clamped mode and fixed to the upper frame; the lower frame is of a hollow structure with a rectangular cross section; the upper frame is of a structure formed by welding a bent steel plate and a cylinder together; the sensor bearing and positioning cylinder is of a cylinder structure provided with a handle matched with an underwater robot arm, and the cylinder seals up the sensor and can resist external pressure. The sensor fixing device is simple in structure and brings convenience to the ROV to quickly mount and replace the self-contained sensor underwater, and the mounting accuracy and reliability are guaranteed.

An improved double-return cylinder dryer, including a body composed of a bracket, a sealed box and a cylinder, and its driving device, supporting device and controller, wherein the axis of the cylinder of the body is parallel to the horizontal plane, and the cylinder is arranged concentrically. The inner and outer cylinders are misplaced and fitted together, and the volume cavities formed constitute two drying and precipitation units respectively. The outer periphery of the cylinder wall board is provided with a heat insulation cover, and the inner peripheral surface of the inner and outer cylinder wall boards is respectively provided with a spiral propulsion type distribution device, and the direction of the helix is ​​reversed. The center of gravity of the ring gear and the barrel is assembled. It effectively solves the defects of easy deformation and displacement and axial displacement of traditional drum dryers. It has reasonable structural design, stable performance, smooth process flow, large precipitation at one time, high thermal efficiency, energy saving and consumption reduction, and a wide range of applications. .

An improved three-pass cylinder dryer, including a body composed of a bracket, a sealed box and a cylinder, and its driving device, supporting device and controller, wherein the axis of the cylinder of the body is parallel to the horizontal plane, and the cylinder is arranged concentrically. The inner, middle and outer cylinders are misplaced and fitted together, and the volume cavities formed constitute three drying and dewatering units respectively. The adjacent wall panels of the inner, middle and outer cylinders are adjusted by supporting and reinforcing buffer pads. Connection and positioning, the outer circumference of the outer cylinder wall board is provided with a heat insulation cover, and the inner peripheral surface of the inner, middle and outer cylinder wall boards is respectively provided with a spiral propulsion spreader, and the rotation of the helix On the contrary, the ring gear on the outer periphery of the machine body is assembled with the center of gravity of the barrel. It effectively solves the defects of easy deformation and displacement and axial displacement of traditional drum dryers. It has reasonable structural design, stable performance, smooth process flow, large precipitation at one time, high thermal efficiency, energy saving and consumption reduction, and a wide range of applications. .

The invention relates to the technical field of chemical industry, and specifically relates to a gumming method of fiber-woven resin reinforced tubes, which is characterized by using a vacuumizing principle to soak a running fiber-woven layer in a sealed resin glue cylinder, and carrying out vacuumizing treatment so that the resin quickly penetrates through the fiber-woven layer to achieve a gumming purpose, wherein a vacuum box (1) is formed by a combination of two semicircular cylinders sealed by a sealing glue cushion (11), the fiber-woven layer (7) is sealed by an annular soft rubber rod (6), the resin enters the vacuum box (1) through a material inlet (3), the fiber-woven layer (7) is soaked in the resin, and the resin enters a groove of a mold (8) through the fiber-woven layer (7) to form a plurality of inner glue rings; and closing the material inlet (3) and starting a vacuum device (5), wherein the air entering along with the fiber-woven layer (7) is quickly raised and broken under the function of negative pressure to fast permeate the resin into the fiber-woven layer (7) to finish the operation of impregnating the fiber quickly. Compared with the prior art, the method provided by the invention has the advantages that the gumming process is finished by vacuum negative pressure, and the product is firm in combination, high in strength and high in surface smoothness.