Title:
液圧式熱収縮補償装置及び方法
Document Type and Number:
Japanese Patent JP5295141
Kind Code:
B2
Abstract:
An apparatus for compensating for fluid contraction in a hydraulic powered telescoping boom (110) includes a monitor (200) determining the elevation angle of the telescoping boom, a supply of hydraulic fluid, and a fluid control responsive to the monitor. The fluid control provides the hydraulic fluid from the supply to a hydraulic cylinder (130) controlling extension of the telescoping boom when the elevation angle exceeds a predetermined threshold angle to compensate for thermal contraction of hydraulic fluid and thus prevent uncommanded boom retraction. A method in accordance with the invention is also disclosed.
Inventors:
Timothy F. Elliott
Stephen Dee Smith
Stephen Dee Smith
Application Number:
JP2010010029A
Publication Date:
September 18, 2013
Filing Date:
January 20, 2010
Export Citation:
Assignee:
Manitowoc Crane Companies LLC
International Classes:
F15B20/00; B66C13/20; B66C23/68; F15B11/08
Domestic Patent References:
| JP2001240381A | ||||
| JP9216786A | ||||
| JP11139766A | ||||
| JP2001122588A | ||||
| JP569069U | ||||
| JP62148728A | ||||
| JP1138950U | ||||
| JP51795U |
Attorney, Agent or Firm:
Yasuhiko Murayama
Masatake Shiga
Takashi Watanabe
Shinya Mitsuhiro
Masatake Shiga
Takashi Watanabe
Shinya Mitsuhiro