Pumps – Including disengageable rotary or frangible drive connection
Patent
1996-05-13
1998-09-01
Izaguirre, Ismael
Pumps
Including disengageable rotary or frangible drive connection
464 32, 403 2, F04B 900, F16D 0908
Patent
active
058001379
ABSTRACT:
A refrigerant compressor includes a drive shaft, a pulley fixedly fitted on the drive shaft, over which is passed a torque-transmitting member for transmitting torque from an external drive source to the drive shaft, and a compression rotational member mounted on the drive shaft for rotation in unison with the drive shaft to enable compression of a refrigerant gas. The pulley has a rim in the form of a hollow cylinder, over which is passed the torque-transmitting member, a boss which is fixedly fitted on the drive shaft, and a support member connecting the rim and the boss. A breakaway portion is provided in the support member or the drive shaft for breaking to disconnect the torque-transmitting member from the compression rotational member when a load torque larger than a predetermined value is applied to the breakaway portion. A bearing is arranged on the pulley for receiving tension of the torque-transmitting member to thereby maintain the rim in a rotating state when the torque-transmitting member is disconnected from the compression rotational member by breaking of the breakaway portion.
REFERENCES:
patent: 3472046 (1969-10-01), Potter
patent: 4621982 (1986-11-01), Schulz et al.
patent: 4859156 (1989-08-01), Kikuchi
patent: 4932280 (1990-06-01), Becker et al.
patent: 5443372 (1995-08-01), Kanoll
patent: 5470118 (1995-11-01), Burton
Eitai Kazuo
Ishida Hiroyuki
Kanaizuka Minoru
Kobayashi Tadashi
Kumagai Shuzo
Izaguirre Ismael
Zexel Corporation
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