DOOR DAMPING APPARATUS AND MANUFACTURING METHOD THEREOF
First Claim
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1. A door damping apparatus connecting a door and an immobile frame, comprising:
- a shaft seat fixed to the immobile frame, the shaft seat including a housing that defines a shaft hole, a receiving hole, and a fluid passage, wherein the shaft hole and the receiving hole are in communication with each other, and opposite ends of the fluid passage are respectively connected to the shaft hole and the receiving hole;
a shaft connected to the door and rotatably disposed in the shaft hole, wherein the shaft has a fixing surface formed thereon;
a cylinder disposed in the receiving hole of the housing;
a piston defining a fluid outlet on one end thereof, the piston being movably disposed in the cylinder to form a reservoir for storing hydraulic liquid, wherein the piston is arranged in proximate to the shaft and selectively abuts the fixing surface;
a spring unit disposed in the reservoir, wherein opposite ends of the spring unit respectively abuts to the cylinder and the piston;
a check valve disposed in the reservoir; and
a throttle valve with one end thereof disposed externally of the shaft seat and another end thereof extending into the fluid passage.
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Accused Products
Abstract
The instant disclosure relates to a door damping apparatus for connecting to a door and an immobile frame. The door damping apparatus includes a shaft seat, a shaft, a cylinder, a piston, a spring unit, a check valve and a throttle valve. The interior of the shaft seat is formed with a fluid passage and a reservoir to store hydraulic fluid. The throttle valve projects into the fluid passage to adjust the flow of the hydraulic fluid, thus allowing the door to be opened smoothly and gently self closes.
30 Citations
19 Claims
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1. A door damping apparatus connecting a door and an immobile frame, comprising:
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a shaft seat fixed to the immobile frame, the shaft seat including a housing that defines a shaft hole, a receiving hole, and a fluid passage, wherein the shaft hole and the receiving hole are in communication with each other, and opposite ends of the fluid passage are respectively connected to the shaft hole and the receiving hole; a shaft connected to the door and rotatably disposed in the shaft hole, wherein the shaft has a fixing surface formed thereon; a cylinder disposed in the receiving hole of the housing; a piston defining a fluid outlet on one end thereof, the piston being movably disposed in the cylinder to form a reservoir for storing hydraulic liquid, wherein the piston is arranged in proximate to the shaft and selectively abuts the fixing surface; a spring unit disposed in the reservoir, wherein opposite ends of the spring unit respectively abuts to the cylinder and the piston; a check valve disposed in the reservoir; and a throttle valve with one end thereof disposed externally of the shaft seat and another end thereof extending into the fluid passage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A manufacturing method of door damping apparatus that defines a fluid passage and a reservoir for storing hydraulic fluid, comprising the step of:
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preparing a stainless steel slab by precision casting; forming the slab into a semi-finished shaft seat; polishing and rinsing the semi-finished shaft seat; electroplating the semi-finished shaft seat; machining the semi-finished shaft seat to the final product; assembling the finished shaft seat to form the door damping apparatus; adding hydraulic fluid into the fluid passage and the reservoir; removing air bubbles from the fluid passage and the reservoir; sealing the shaft seat. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification