Title:
AUTOMATIC TRANSMISSION
Document Type and Number:
WIPO Patent Application WO2001053725
Kind Code:
B1
Abstract:
Automatic transmission, comprising at least one primary hydraulic pump (1) arranged to be powered by a motor, said primary pump (1) being arranged to power a number of at least two secondary hydraulic pumps (21-2n) which are mechanically connected to an outgoing propeller shaft (6), the secondary hydraulic pumps being arranged for active powering of said outgoing propeller shaft when the hydraulic pressure caused by the primary pump in a closed room (A) between the primary pump and the secondary pumps, reaches predetermined levels which are different for the various secondary pumps (21, 22 and ... 2n respectively). Each of the secondary hydraulic pumps (21 - 2n) is preferably closed by means of a mechanical spring resistance from a coil spring (213 - 2n3) against a valve (212 - 2n2) which abuts a valve seat, until the pressure from the primary pump (1) gets sufficiently high to overcome the resistance from said coil spring, the secondary hydraulic pumps (21 - 2n) having individually adapted springs (213 - 2n3) which open at mutually different pressures.
Inventors:
REINERTSEN KAI-TOMMY (NO)
Application Number:
PCT/NO2001/000025
Publication Date:
January 03, 2002
Filing Date:
January 24, 2001
Export Citation:
Assignee:
REINERTSEN KAI TOMMY (NO)
International Classes:
F16H39/02; F16H61/44; F16H61/444; (IPC1-7): F16H61/44
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