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1. US20160280518 - Jack system

Office United States of America
Application Number 14997676
Application Date 18.01.2016
Publication Number 20160280518
Publication Date 29.09.2016
Grant Number 09758359
Grant Date 12.09.2017
Publication Kind B2
IPC
B66F 3/08
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
FHOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
3Devices, e.g. jacks, adapted for uninterrupted lifting of loads
08screw-operated
B66F 3/46
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
FHOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
3Devices, e.g. jacks, adapted for uninterrupted lifting of loads
46Combinations of several jacks with means for interrelating lifting or lowering movements
CPC
B66F 3/08
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
3Devices, e.g. jacks, adapted for uninterrupted lifting of loads
08screw operated
B66F 3/46
BPERFORMING OPERATIONS; TRANSPORTING
66HOISTING; LIFTING; HAULING
FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
3Devices, e.g. jacks, adapted for uninterrupted lifting of loads
46Combinations of several jacks with means for interrelating lifting or lowering movements
Applicants K-Line Industries, Inc.
Inventors Dwain L. Kamphuis
Lukas T. Woltjer
Agents Price Heneveld LLP
Title
(EN) Jack system
Abstract
(EN)

The present jack apparatus is particularly adapted for heavy duty lifting. The jack apparatus includes a base; a pair of screw jacks; a yoke supported by the screw jacks; a lifting tube supported on the yoke; a shaft coupler coupling the screw jacks; a power unit driving one of the screw jacks and through the shaft coupler also driving the other screw jack; and a housing covering the screw jacks and other components. The pair of screw jacks each have threaded lifting shafts designed to eliminate risk of unexpected lowering of the jack's lifting tube even if power is lost. A jack system is described including two or more of the jack apparatus controlled by a single control for simultaneous operation.