Title:
FLUID PRESSURE STRIKING DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/105447
Kind Code:
A1
Abstract:
A fluid pressure striking device (1): has a tubular cylinder (2), a piston (3) that is fit inside the cylinder (2) and that can slide in the axial direction of the cylinder (2), and a rod-shaped chisel (4) that is inserted so that a portion thereof projects from one end of the cylinder (2) in the axial direction and that projects further from the one end of the cylinder (2) by being struck by the piston (3) sliding inside the cylinder (2) in the axial direction to the one end; has a first chamber (5), a second chamber (6), and a third chamber (7) partitioned from the one end side in the axial direction to the other end side in the axial direction of the cylinder (2) by the inner circumferential wall (2a) of the cylinder (2) and the outer circumferential wall (3s) of the piston (3); and has, formed therein, a channel capable of supplying a fluid to the first chamber (5) from a fluid supply unit, which has a higher fluid pressure than the first chamber (5) when the piston (3) strikes the chisel (4).
Inventors:
ITO MASANORI (JP)
FUJIMOTO HIROSHI (JP)
FUJIMOTO HIROSHI (JP)
Application Number:
PCT/JP2019/043632
Publication Date:
May 28, 2020
Filing Date:
November 07, 2019
Export Citation:
Assignee:
TEISAKU KK (JP)
International Classes:
B25D9/14
Foreign References:
| JP2018138321A | 2018-09-06 | |||
| JPH07214479A | 1995-08-15 | |||
| JPS6393577A | 1988-04-23 | |||
| JP2015163425A | 2015-09-10 | |||
| JP2016140929A | 2016-08-08 | |||
| JP2015163426A | 2015-09-10 |
Other References:
See also references of EP 3885076A4
Attorney, Agent or Firm:
OKADA PATENT & TRADEMARK OFFICE, P. C. (JP)
Download PDF:
Previous Patent: BIOLOGICAL BODY SIGNAL DETECTION CIRCUIT, HUM-NOISE REDUCING CIRCUIT, AND WEARABLE DEVICE
Next Patent: LITHIUM SECONDARY BATTERY
Next Patent: LITHIUM SECONDARY BATTERY