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US 11,590,639 B2Granted
Fluid damper and driving tool
AssigneeMax Co., Ltd.
InventorHiroshi Tanaka
Life of this patent
Estimating the term…
Abstract
A fluid damper includes a cylinder tube portion which is filled with a fluid, a piston which is provided so as to be movable in an inner portion of the cylinder tube portion and whose moving speed is controlled with resistance of the fluid, and a biasing member which expands and contracts in accordance with a position of the piston and which applies a force corresponding to an expansion and contraction amount of the biasing member to the piston. The resistance of the fluid at a time the piston moves is changed in accordance with the position of the piston.
Claims16
A driving tool comprising:
- a driving mechanism which drives a fastener supplied to a nose portion;
- a contact lever which is configured to switch between presence and absence of actuation of the driving mechanism;
- and
- a fluid damper which is configured to control a moving speed of the contact lever;
- wherein the fluid damper comprises:
- a cylinder tube portion which is filled with a fluid;
- a piston which is provided so as to be movable in an inner portion of the cylinder tube portion and whose moving speed is controlled with resistance of the fluid;
- a biasing member which expands and contracts in accordance with a position of the piston and which applies a force corresponding to an expansion and contraction amount of the biasing member to the piston,
- wherein the resistance of the fluid at a time the piston moves is changed in accordance with the position of the piston;
- a shaft portion which extends out from the cylinder tube portion, and which is moved by the piston;
- a moving member positioned outside of the cylinder tube portion and which is moved by the shaft portion;
- and
- a regulating member which is actuated by the moving member, wherein the regulating member is positioned between moving member and the contact lever, and the regulating member is configured to regulate a position of the contact lever.
10 more elements
A driving tool comprising:
- a driving mechanism which drives a fastener supplied to a nose portion;
- a trigger which receives one operation for actuating the driving mechanism;
- a contact arm which is provided so as to be reciprocally movable and which receives another operation for actuating the driving mechanism;
- a contact lever which is provided so as to be capable of being actuated by operations of the trigger and the contact arm and which is configured to switch between presence and absence of actuation of the driving mechanism;
- and
- a fluid damper which is configured to control a moving speed of the contact lever, wherein
- the fluid damper comprises:
- a cylinder tube portion which is filled with a fluid;
- a piston which is provided so as to be movable in an inner portion of the cylinder tube portion and whose moving speed is controlled with resistance of the fluid;
- a biasing member which expands and contracts in accordance with a position of the piston and which applies a force corresponding to an expansion and contraction amount of the biasing member to the piston,
- wherein the resistance of the fluid at a time the piston moves is changed in accordance with the position of the piston;
- and
- the driving tool further including a hole which passes through the piston and which is selectively opened and closed by a check valve.
10 more elements
A driving tool comprising:
- a driving mechanism which drives a fastener supplied to a nose portion;
- a contact lever which is configured to switch between presence and absence of actuation of the driving mechanism;
- and
- a fluid damper which is configured to control a moving speed of the contact lever;
- wherein the fluid damper comprises:
- a cylinder tube portion which is filled with a fluid;
- a piston which is provided so as to be movable in an inner portion of the cylinder tube portion and whose moving speed is controlled with resistance of the fluid;
- and
- a biasing member which expands and contracts in accordance with a position of the piston and which applies a force corresponding to an expansion and contraction amount of the biasing member to the piston,
- wherein the resistance of the fluid at a time the piston moves is changed in accordance with the position of the piston;
- wherein the fluid damper includes a first bypass flow path, and an amount of fluid passing through the first bypass flow path varies with position of the piston with respect to the first bypass flow path;
- and
- the driving tool further including a hole which passes through the piston and which is selectively opened and closed by a check valve.
10 more elements
Dependencies are inferred from the claim text.