▪ US Patent No. 9,988,843 (LEE, Il Jae)
- 발명의 명칭: IMPACT BODY FOR HYDRAULIC IMPACT DEVICE
- 대표도면
- 대표 독립항:
1. A hitting body for a hydraulic stroke device, wherein the hitting body includes a body (100), and a piston (50) reciprocally positioned in the body (100), wherein the body (100) comprises a high pressure space groove (123) and a low pressure space groove (124) formed at an inner wall of the body, the high pressure space groove (123) and the low pressure space groove (124) bounded by a separating projection (120), wherein a high pressure port (123a) is connected to the high pressure space groove (123) to supply fluid in order to operate the piston (50), and a low pressure port (124a) is connected to the low pressure space groove (124) to discharge the fluid, a cylinder liner (200) of annular shape formed of a singular wall member and positioned in an inner space of the body (100), the cylinder liner (200) including an upper high pressure inlet hole (216) and a lower high pressure inlet hole (215) formed through the wall of the annular cylinder liner (200) at an upper side and a lower side of the cylinder liner (200), respectively, to supply a high pressure fluid to an interior area of the cylinder liner (200), and the cylinder liner (200) further including a low pressure hole (220) formed through the wall of the annular cylinder liner (200) at a location corresponding to the low pressure space groove (124) so as to discharge the fluid to the low pressure space groove (124), and an operating flow path (210) and a return flow path (270), both formed in a longitudinal direction within the wall of the cylinder liner (200), a seal retainer (240) of annular shape mounted to an upper end of the body (100), a circular valve (230) of annular shape positioned between a lower portion of the annular seal retainer (240) and an upper portion of the cylinder liner (200) in a coaxial relation with the piston (50) and the seal retainer (240), wherein the cylinder liner (200) further includes a valve operating flow path hole (213) in fluid communication with an upper area of the operating flow path (210), and a short stroke flow path hole (211) and a long stroke flow path hole (212) in fluid communication with a lower area of the operating flow path (210), wherein an upper side of the return flow path (270) is connected with the low pressure hole (220), and a lower side of the return flow path (270) is connected with a lower return hole (272), and an intermediate side of the return flow path (270) is connected with a return hole (271) which is in fluid communication to a piston operating chamber (D) disposed between the piston (50) and the interior surface of the cylinder liner (200), wherein the piston (50) includes an operating portion (54) at an intermediate side, a lower piston portion (52) at a lower side, and an upper piston portion (53) at an upper side of the piston (50), wherein the lower piston portion (52) includes a lower projection (52a) configured to move the piston (50) to an upward direction by the pressure of the high pressure fluid introduced through the lower high pressure inlet hole (215), while allowing the short stroke flow path hole (211) and the long stroke flow path hole (212) to be opened as the lower projection (52a) passes in the upward direction, wherein the circular valve (230) includes a valve upper area (230b) and a valve middle area (230a), the valve upper area (230b) having a surface area greater than that of the valve middle area (230a) so as to enable the circular vale (230) to move in a downward direction by the pressure of the fluid supplied through the valve operating flow path hole (213), wherein the circular valve (230) further includes a valve middle hole (231) configured to allow the fluid supplied via the upper high pressure inlet hole (216) to flow to a piston upper chamber (C) when the circular valve (230) is moved in the downward direction, wherein the piston (50) further includes an operating projection (54a) at an upper side of the lower projection (52a), the operating projection (54a) having a surface area greater than that of the lower projection (52a) so as to enable the piston (50) to move in a downward direction by the pressure of the fluid introduced in the piston upper chamber (C) through the upper high pressure inlet hole (216) and the valve middle hole (231) when the circular valve (230) is moved in the downward direction, and wherein the piston operating chamber (D) is in fluid communication with the return hole (271) to enable the circular valve (230) to move in the upward direction as the valve operating flow path hole (213) becomes a lower pressure state.
▪ US Patent No. 10,047,867 (BOXY BLIND VALVE CO., LTD.)
- 발명의 명칭: LINE BLIND VALVE
- 대표 도면
- 대표 독립항:
1. A line blind valve comprising: a valve body (100) having an opening at each of a front side and a rear side thereof; a fixed pipe (200) fixedly provided on the front side and inserted in the opening of the front side; a moving pipe (300) provided on the rear side and inserted in the opening of the rear side, and movable in a direction of a pipeline, with threads (320) formed on an outer circumferential surface thereof; a blind (400) movably provided between the fixed pipe (200) and the moving pipe (300) to open or block the pipeline by moving upward or downward; and a drive assembly (500) including a gear set (520) engaged with the threads of the moving pipe (300) and configured to press the moving pipe (300) toward the blind (400) by an operation thereof so as to sealingly fix the moving pipe, and a drive unit (540) coupled to an upper portion of the gear set (520) so as to control a rotation direction of the gear set (520), wherein the gear set (520) includes: a ring gear (522) engaged with the outer circumferential surface of the moving pipe, and having threads on an inner surface thereof; and a lever (524) provided at a top of the ring gear (522) and connected to the drive unit (540), wherein the drive unit (540) includes: a worm gear (544) connected to a handle (542); a screw shaft (546) rotating in conjunction with the worm gear (544); and a moving nut (548) moving forward and backward by being engaged with the screw shaft (546), with a lower portion thereof coupled to the lever (524).
▪ US Trademark No. 5,477,009 (CHOI, BONGHWAN et al.)
- 상표명: 로봇김밥
- 지정상품/지정서비스업
(IC 043) G&S: Restaurant services; self-service restaurant services; canteen services; cafe services; cafeteria services; tea rooms; fast-food restaurant services; food and drink catering; snack-bar services; carry-out restaurants; Korean restaurants; agency services for reservation of restaurants; restaurant services, namely, tourist eating house services; restaurant information services; restaurant reservation services; buffet restaurants; restaurant and catering services; western style restaurants; restaurants featuring home delivery; mobile restaurant services; food preparation; providing of food and drink for patients and guests