Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
FLUID DAMPER AND DRIVING TOOL
Document Type and Number:
WIPO Patent Application WO/2019/168075
Kind Code:
A1
Abstract:
This oil damper (91) is provided with: a cylinder unit (93a) which is filled with oil; a piston (93b) which is provided so as to be capable of moving inside of the cylinder unit (93a), and the movement speed of which is controlled with resistance caused by the oil; a spring (93g) which expands and contracts in accordance with the position of the piston (93b) and which applies to the piston a force corresponding to the amount of expansion and contraction; and a first bypass flow path (93i1) which, depending on the position of the piston (93b), increases the area of the flow path through which the oil passes, and, in response to change in the force applied by the spring (93g) to the piston (93b), reduces the load during movement of the piston (93b) by changing the resistance caused by the oil during movement of the piston (93b).

Inventors:
TANAKA Hiroshi (6-6, Nihonbashi Hakozaki-cho, Chuo-k, Tokyo 02, 〒1038502, JP)
Application Number:
JP2019/007712
Publication Date:
September 06, 2019
Filing Date:
February 27, 2019
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MAX CO., LTD. (6-6 Nihonbashi Hakozaki-cho, Chuo-ku Tokyo, 02, 〒1038502, JP)
International Classes:
F16F9/48; B25C7/00; F16F9/32
Domestic Patent References:
WO2018159491A12018-09-07
Foreign References:
JPS55175647U1980-12-16
JPS57164335U1982-10-16
JPH08276375A1996-10-22
JPH10156753A1998-06-16
JP2016179526A2016-10-13
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (Toranomon East Bldg. 10F, 7-13 Nishi-Shimbashi 1-chome, Minato-k, Tokyo 03, 〒1050003, JP)
Download PDF: