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1. WO2018070881 - A PNEUMATIC OR HYDRAULIC MECHANISM

Publication Number WO/2018/070881
Publication Date 19.04.2018
International Application No. PCT/NZ2017/050130
International Filing Date 11.10.2017
Chapter 2 Demand Filed 18.04.2018
IPC
F15B 15/14 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
15Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
08characterised by the construction of the motor unit
14of the straight-cylinder type
B25C 1/04 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; HANDLES FOR HAND IMPLEMENTS; WORKSHOP EQUIPMENT; MANIPULATORS
CHAND-HELD NAILING OR STAPLING TOOLS; MANUALLY-OPERATED PORTABLE STAPLING TOOLS
1Hand-held nailing tools; Nail feeding devices therefor
04operated by fluid pressure
CPC
B25C 1/041
BPERFORMING OPERATIONS; TRANSPORTING
25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
CHAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
1Hand-held nailing tools
04operated by fluid pressure ; , e.g. by air pressure
041with fixed main cylinder
B25C 1/047
BPERFORMING OPERATIONS; TRANSPORTING
25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
CHAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
1Hand-held nailing tools
04operated by fluid pressure ; , e.g. by air pressure
047Mechanical details
F15B 15/1452
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
15Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
08Characterised by the construction of the motor unit
14of the straight-cylinder type
1423Component parts; Constructional details
1447Pistons; Piston to piston rod assemblies
1452Piston sealings
F15B 15/1476
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
15Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
08Characterised by the construction of the motor unit
14of the straight-cylinder type
1423Component parts; Constructional details
1476Special return means
F15B 15/204
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
15Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
20Other details ; , e.g. assembly with regulating devices
204Control means for piston speed or actuating force without external control, e.g. control valve inside the piston
F15B 15/225
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
15Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
20Other details ; , e.g. assembly with regulating devices
22for accelerating or decelerating the stroke
225with valve stems operated by contact with the piston end face or with the cylinder wall
Applicants
  • S-GUN LIMITED [NZ]/[NZ]
Inventors
  • MOODIE, David John
Agents
  • AJ PARK
Priority Data
72503211.10.2016NZ
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) A PNEUMATIC OR HYDRAULIC MECHANISM
(FR) MÉCANISME PNEUMATIQUE OU HYDRAULIQUE
Abstract
(EN) A pneumatic or hydraulic mechanism has a housing defining a piston chamber and having a fluid inlet port. A piston is slidable in the piston chamber. The piston partitions the piston chamber into a front chamber and a rear chamber. The piston has one or more passages for fluid communication between the rear chamber and the front chamber, the one or more passages being sealed by a sealing mechanism. The sealing mechanism has a sealing state in which the sealing mechanism substantially inhibits fluid communication between the rear chamber and the front chamber, and a non-sealing state in which the sealing mechanism allows fluid communication between the rear chamber and the front chamber. The piston is slidable between a first position and a second position. When the piston is positioned in the first position, the sealing mechanism is in the sealing state. Upon supply of a fluid to the inlet port, the fluid urges the piston to its second position and then causes the sealing mechanism to change to the non-sealing state until the pressure in the rear chamber and the front chamber equalises, allowing the sealing mechanism to return to the sealing state. Upon removal of fluid from the rear chamber, the fluid in the front chamber urges the piston to return to its first position.
(FR) Un mécanisme pneumatique ou hydraulique comporte un logement définissant une chambre de piston et pourvu d'un orifice d'entrée de fluide. Un premier piston peut coulisser dans la chambre de piston. Le piston divise la chambre en une chambre avant et une chambre arrière. Le piston comporte un ou plusieurs passages pour une communication fluidique entre la chambre arrière et la chambre avant, lesdits un ou plusieurs passages étant fermés de manière étanche par un mécanisme d'étanchéité. Le mécanisme d'étanchéité présente un état d'étanchéité dans lequel il empêche sensiblement une communication fluidique entre la chambre arrière et la chambre avant, et un état de non-étanchéité dans lequel il permet une communication fluidique entre la chambre arrière et la chambre avant. Le piston peut coulisser entre une première position et une seconde position. Lorsque le piston est positionné dans la première position, le mécanisme d'étanchéité est à l'état d'étanchéité. Lors de l'amenée d'un fluide vers l'orifice d'entrée, le fluide pousse le piston vers sa seconde position et oblige ensuite le mécanisme d'étanchéité à passer de l'état de non-étanchéité jusqu'à égalisation de la pression dans la chambre arrière et la chambre avant, permettant ainsi au mécanisme d'étanchéité de revenir à l'état d'étanchéité. Lors du retrait du fluide de la chambre arrière, le fluide dans la chambre avant pousse le piston afin que celui-ci revienne à sa première position.
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