公开(公告)号：AT210004T

公开(公告)日：2001-12-15

申请号：AT97910712

申请日：1997-09-16

Applicant: APPLIED POWER INC

Inventor： ROTHERING LAWRENCE P

IPC: B25B21/00 ,  B25B23/145

Abstract: A hydraulic pump assembly (10) for powering a hydraulic torque wrench (24) is air-powered and has hydro-pneumatic control circuitry (39) which continues operation of an air motor (18) which drives the hydraulic pump (16) for a post-advance period after an advance actuator (55) is deactuated. Operation of the pump (16) is continued for a period sufficient to retract a double-acting torque wrench (24), to permit subsequent advances of the wrench (24) within the post-advance period without restarting the pump (16) or to permit a single acting wrench to be moved from one fastener to the next within the post-advance period without restarting the pump (16). Operation of the pump (16) is terminated when the post-advance period expires if the advance actuator (55) is not reactuated, so as to conserve energy and avoid unnecessary heating of the hydraulic fluid.

公开(公告)号：CA2266335C

公开(公告)日：2008-02-12

申请号：CA2266335

申请日：1997-09-16

Applicant: APPLIED POWER INC

Inventor： ROTHERING LAWRENCE P

IPC: B25B21/00 ,  B25B13/00 ,  B25B23/145

Abstract: A hydraulic pump assembly (10) for powering a hydraulic torque wrench (24) i s air-powered and has hydro-pneumatic control circuitry (39) which continues operation of an air motor (18) which drives t he hydraulic pump (16) for a post-advance period after an advance actuator (55) is deactuated. Operation of the pump (16) is continued for a period sufficient to retract a double-acting torque wrench (24), to permit subsequent advances of the wrench (24) within the post-advan ce period without restarting the pump (16) or to permit a single acting wrench to be moved from one fastener to the next within the po st- advance period without restarting the pump (16). Operation of the pump (16) is terminated when the post-advance period expires if the advance actuator (55) is not reactuated, so as to conserve energy and avoid unnecessary heating of the hydraulic fluid.

公开(公告)号：BR9713210A

公开(公告)日：2000-04-04

申请号：BR9713210

申请日：1997-09-16

Applicant: APPLIED POWER INC

Inventor： ROTHERING LAWRENCE P

IPC: B25B21/00 ,  B25B23/145

Abstract: A hydraulic pump assembly (10) for powering a hydraulic torque wrench (24) is air-powered and has hydro-pneumatic control circuitry (39) which continues operation of an air motor (18) which drives the hydraulic pump (16) for a post-advance period after an advance actuator (55) is deactuated. Operation of the pump (16) is continued for a period sufficient to retract a double-acting torque wrench (24), to permit subsequent advances of the wrench (24) within the post-advance period without restarting the pump (16) or to permit a single acting wrench to be moved from one fastener to the next within the post-advance period without restarting the pump (16). Operation of the pump (16) is terminated when the post-advance period expires if the advance actuator (55) is not reactuated, so as to conserve energy and avoid unnecessary heating of the hydraulic fluid.

公开(公告)号：AU4801397A

公开(公告)日：1998-04-14

申请号：AU4801397

申请日：1997-09-16

Applicant: APPLIED POWER INC

Inventor： ROTHERING LAWRENCE P

IPC: B25B21/00 ,  B25B23/145

Abstract: A hydraulic pump assembly (10) for powering a hydraulic torque wrench (24) is air-powered and has hydro-pneumatic control circuitry (39) which continues operation of an air motor (18) which drives the hydraulic pump (16) for a post-advance period after an advance actuator (55) is deactuated. Operation of the pump (16) is continued for a period sufficient to retract a double-acting torque wrench (24), to permit subsequent advances of the wrench (24) within the post-advance period without restarting the pump (16) or to permit a single acting wrench to be moved from one fastener to the next within the post-advance period without restarting the pump (16). Operation of the pump (16) is terminated when the post-advance period expires if the advance actuator (55) is not reactuated, so as to conserve energy and avoid unnecessary heating of the hydraulic fluid.

公开(公告)号：AU718261B2

公开(公告)日：2000-04-13

申请号：AU4801397

申请日：1997-09-16

Applicant: APPLIED POWER INC

Inventor： ROTHERING LAWRENCE P

IPC: B25B21/00 ,  B25B23/145

Abstract: A hydraulic pump assembly (10) for powering a hydraulic torque wrench (24) is air-powered and has hydro-pneumatic control circuitry (39) which continues operation of an air motor (18) which drives the hydraulic pump (16) for a post-advance period after an advance actuator (55) is deactuated. Operation of the pump (16) is continued for a period sufficient to retract a double-acting torque wrench (24), to permit subsequent advances of the wrench (24) within the post-advance period without restarting the pump (16) or to permit a single acting wrench to be moved from one fastener to the next within the post-advance period without restarting the pump (16). Operation of the pump (16) is terminated when the post-advance period expires if the advance actuator (55) is not reactuated, so as to conserve energy and avoid unnecessary heating of the hydraulic fluid.

公开(公告)号：CA2266335A1

公开(公告)日：1998-03-26

申请号：CA2266335

申请日：1997-09-16

Applicant: APPLIED POWER INC

Inventor： ROTHERING LAWRENCE P

IPC: B25B21/00 ,  B25B23/145

Abstract: A hydraulic pump assembly (10) for powering a hydraulic torque wrench (24) is air-powered and has hydro-pneumatic control circuitry (39) which continues operation of an air motor (18) which drives the hydraulic pump (16) for a postadvance period after an advance actuator (55) is deactuated. Operation of the pump (16) is continued for a period sufficient to retract a double-acting torque wrench (24), to permit subsequent advances of the wrench (24) within the post-advance period without restarting the pump (16) or to permit a single acting wrench to be moved from one fastener to the next within the postadvance period without restarting the pump (16). Operation of the pump (16) is terminated when the post-advance period expires if the advance actuator (55) is not reactuated, so as to conserve energy and avoid unnecessary heating of the hydraulic fluid.