Variable-speed buffer oil cylinder
AssigneeGuangdong Zhaogao Metal Technology Co., Ltd.
InventorBincheng Wu
Life of this patent
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Abstract
A variable-speed buffer oil cylinder includes a housing and a piston. The housing is configured to have an inner cavity and provided with an opening at a top of the housing, where a variable-diameter oil needle vertically arranged towards the opening is disposed on a bottom surface of the inner cavity. The piston includes a plunger movably fitted with the inner cavity and a piston rod connected to the plunger and extending out of the opening. The plunger divides the inner cavity into an upper oil chamber and a lower oil chamber. The piston is provided with a first oil channel in communication with the upper oil chamber and the lower oil chamber, the variable-diameter oil needle cooperates with the first oil channel, and a check valve is arranged on the plunger.
Claims20
A variable-speed buffer oil cylinder, comprising:
- a housing configured to have an inner cavity and provided with an opening at a top of the housing, wherein a variable-diameter oil needle vertically arranged towards the opening is disposed on a bottom surface of the inner cavity;
- and
- a piston comprising a plunger movably fitted with the inner cavity and a piston rod connected to the plunger and extending out of the opening, wherein the plunger divides the inner cavity into an upper oil chamber and a lower oil chamber, wherein the piston is provided with a first oil channel in communication with the upper oil chamber and the lower oil chamber, wherein the variable-diameter oil needle cooperates with the first oil channel, and wherein a check valve is arranged on the plunger.
An apparatus, comprising:
- a housing comprising:
- an inner cavity comprising a bottom surface;
- a top comprising an opening;
- and
- a variable-diameter oil needle vertically arranged towards the opening and disposed on the bottom surface;
- a piston comprising:
- a plunger movably fitted with the inner cavity;
- a piston rod connected to the plunger and extending out of the opening, wherein the plunger divides the inner cavity into an upper oil chamber and a lower oil chamber;
- and
- a first oil channel in communication with the upper oil chamber and the lower oil chamber, wherein the variable-diameter oil needle cooperates with the first oil channel;
- and
- a check valve arranged on the plunger.
A self-closing hinge, comprising:
- a door leaf;
- and
- variable-speed buffer oil cylinder coupled to the door leaf and comprising:
- a housing comprising:
- an inner cavity comprising a bottom surface;
- a top comprising an opening;
- and
- a variable-diameter oil needle vertically arranged towards the opening and disposed on the bottom surface;
- a piston comprising:
- a plunger movably fitted with the inner cavity;
- a piston rod connected to the plunger and extending out of the opening, wherein the plunger divides the inner cavity into an upper oil chamber and a lower oil chamber;
- and
- a first oil channel in communication with the upper oil chamber and the lower oil chamber, wherein the variable-diameter oil needle cooperates with the first oil channel;
- and
- a check valve arranged on the plunger.
Dependencies are inferred from the claim text.