Class / Patent application number | Description | Number of patent applications / Date published |
074890400 | Contamination related | 11 |
20080196523 | Dustproof Device for a Ball Screw - A dustproof device for a ball screw disposed on an end surface of a nut comprises: an absorber, an oil scraping piece and a wiping member. The absorber is made of liquid-absorbing material. The oil scraping piece has an oil scraping portion contacting the surface of the screw. The wiping member is formed with a threaded portion for meshing with the surface of the screw. And a plurality of protrusions is formed between the wiping member and the oil scraping piece for defining at least one radial through hole between the wiping member and the oil scraping piece. Therefore, the dustproof device can block and remove powder and liquid, and prevent lubricant leakage out of the nut and can absorb a tiny amount of cutting fluid passing through the oil scraping piece. | 08-21-2008 |
20090308187 | LINEAR ACTUATOR FOR RECLINING FURNITURE - A linear actuator for reclining furniture has a rotary motor that can axially displace a nonrotatable inner tube coaxial engaged in an axially fixed and nonrotatable outer tube, with the inner tube projecting axially forward from an end of the outer tube. An inner sleeve coaxially fits around the end of the outer tube and is axially traversed by the inner tube, and an outer sleeve coaxially fits around the inner sleeve, projects axially forward and rearward past the inner sleeve, and ix axially traversed by the inner tube. The outer sleeve has axially forward of the inner sleeve a radially inwardly projecting collar engaged around the inner tube and bearing axially rearwardly on the inner sleeve. | 12-17-2009 |
20100000353 | Chips Dischargeable Wiper - A chips dischargeable wiper is disposed at the end of a nut, the wiper is defined with a flange, a plurality of ribs integrally formed with the flange, and a plurality of through holes located beside the flange. The flange is used to mate with the helical groove of the ball screw in such a manner at least a rib tapered from outside in is disposed between the flange and the screw shaft, which not only can reduce the resistance of the wiper, but also can effectively prevent intrusion of foreign objects into the screw shaft and can prevent leakage of lubricating agent. Furthermore, the rib can collect dusts and the foreign objects and discharge them out of the through holes. Therefore, the structure of wiper is simplified and can be used for a long time without maintenance. | 01-07-2010 |
20100192711 | ROLLING DEVICE - A rolling device having high silencing effect and requiring no positional alignment working to the seal is provided. The rolling device includes an inner member, an outer member and a number of rolling members disposed between these inner and outer members to thereby allow the outer member to carry out relative rotational motion with respect to the inner member. In such rolling device, an end plate | 08-05-2010 |
20100206102 | LINEAR ACTUATOR WITH DUSTPROOF MECHANISM - A linear actuator with a dustproof mechanism provides reliable dustproof capability over the entire stroke of the actuator. A linear actuator | 08-19-2010 |
20100288063 | Dustproof device for ball screw apparatus - A ball screw device includes an elongated screw shaft and a ball nut having helical grooves for receiving ball bearing members, a housing is attached to the ball nut and includes a bore for receiving the screw shaft, and includes one or more slots communicative with the bore of the housing, and one or more wiper members are changeably engaged into the slots of the housing and include a wiper element engaged into the bore of the housing for engaging into the groove of the screw shaft and for removing or wiping off the dirt from the helical groove of the screw shaft and for preventing the ball nut and the screw shaft from being damaged by the dirt. | 11-18-2010 |
20120060631 | TWO-LIP DUST-PROOF WIPER OF A BALL SCREW - A two-lip dust-proof wiper of a ball screw having a main ring body, with a ringed sheet, and a screwed hole, a circumferential portion and first/second flanged portions. A wiping ring surface is set into the hole. Fine interference fit can be implemented between the wiping ring surface and the periphery of the ball screw. A first wiping lip is annularly formed onto the wiping ring surface for mating with the first flanged portion, and a second wiping lip is annularly formed onto the wiping ring surface for mating with the second flanged portion, such that the first/second wiping lips are protruded at both sides of the surface. The wiping lips and the periphery of ball screw are under interference fit, the interference being larger than that of the wiping ring surface and ball screw. The protruding direction of the wiping lips runs parallel with the flanged portions. | 03-15-2012 |
20140116166 | Linear Device - A linear device is provided which can greatly reduce an amount of leakage of fine particles that are produced between a rolling element raceway and rolling elements to the outside of the device and which is therefore suitable for a semiconductor production apparatus or liquid crystal display panel production apparatus or other clean environment. In a linear device, each of a pair of seal members is formed to a shape which has a clearance of 0.025 to 0.15 mm in range with respect to a raceway member when cut along a direction perpendicular to the axial direction of the raceway member in a state attached to a moving member. Grease with a worked penetration of 175 to 250 is coated between the rolling element raceway and the rolling elements. | 05-01-2014 |
20140190287 | BALL SCREW SEAL - a ball screw seal assembly which includes at least one energizer and a seal body, the ball screw seal assembly being configured for being positioned in a housing groove, the seal body including at least one outer diameter lip and two inner diameter lips, the at least one outer diameter lip being configured for contacting and optionally sealing against the housing groove, the inner diameter lips being configured for wiping or scraping an outer surface of a threaded rod including a plurality of threads, the inner diameter lips being wipers or scrapers and being spaced apart from one another, the at least one energizer being configured for energizing and thereby biasing each of the inner diameter lips radially inwardly. | 07-10-2014 |
20160076631 | Electric Linear Actuator - An electric linear actuator has an electric motor, a speed reduction mechanism, and a ball screw mechanism to convert rotational motion of the electric motor to an axial linear motion of a drive shaft. The ball screw mechanism nut and screw shaft both include helical screw grooves with a large number of balls between them. The housing has a first housing portion and a second housing portion. The electric motor is mounted on the first housing portion. The second housing portion abuts an end face of the first housing portion. The first housing portion has a cylindrical gear containing portion to contain the speed reduction mechanism. An end part of the gear containing portion extends radially inward to form a bottom portion to cover the speed reduction mechanism. The bottom portion of the first housing portion and the second housing portion are formed, respectively, with abutment surfaces. | 03-17-2016 |
074890410 | Imperforate enclosure | 1 |
20150330497 | ACTUATOR - The purpose of the present invention is to provide an actuator such that egress of a lubricant to the outside of a housing during forward and rearward movement of a rod is prevented. The actuator comprises: a housing having a rod through-hole; a rod which passes through the rod through-hole such that a portion thereof protrudes to the outside of the housing and is driven forward and rearward; a first rod sealing member which is arranged near the outside of the housing in the rod through-hole; a second rod sealing member arranged near the inside of the housing in the rod through-hole; a lubricant supply part provided in the housing and supplying lubricant to the rod through-hole; and a pressure change absorption groove which is provided between the first rod sealing member and the second rod sealing member in the rod through-hole to communicate with the lubricant supply part, and forms an air layer while absorbing the pressure changes associated with the forward and rearward movement of the rod. | 11-19-2015 |