Us Patent Ideas

Wheelchair Patent Ideas Search

Shock absorber of a seat of a wheelchair

Abstract
A shock absorber is provided to a seat of a wheelchair, which includes an outer tube secured on an upper side of a frame of the wheelchair, an inner tube secured on a bottom of the seat and movably passed into the outer tube, and a spring-loaded shock absorbing mechanism; the outer tube is formed with a pair of opposing radial through holes on an upper end portion thereof; the inner tube is formed with two opposing lengthwise extending slots, and is prevented from separating from the outer tube with help of a pin, which is passed through the radial holes as well as the slots; the shock absorbing mechanism is held in the outer tube and connected to the outer tube, and a lower end of the inner tube at lower and upper ends respectively.

--------------------------------------------------------------------------------
Inventors: Lin; Samuel; (Chia Yi City, TW)
Correspondence Name and Address: MORTON J. ROSENBERG;ROSENBERG, KLEIN & LEE
SUITE 101
3458 ELLICOTT CENTER DRIVE
ELLICOTT CITY
MD
21043
US


Serial No.: 209829
Series Code: 11
Filed: August 24, 2005

U.S. Current Class: 188/266
U.S. Class at Publication: 188/266
Intern'l Class: F16D 57/00 20060101 F16D057/00

 

--------------------------------------------------------------------------------

Claims

--------------------------------------------------------------------------------

1. A shock absorber of a seat of a wheelchair, comprising a shock absorbing mechanism; the shock absorbing mechanism being held in an inner tube, which is secured on a bottom of a seat of a wheelchair at an upper end thereof; the inner tube being formed with two lengthwise extending slots faced with each other; the inner tube having a first pin disposed in a lower end thereof; the inner tube being passed into, and linearly displaceable relative to an outer tube, which is secured on an upper side of a frame of the wheelchair at a lower end thereof; the outer tube being formed with a first pair of opposing radial through holes on an upper end portion thereof; the inner tube being prevented from separating from the outer tube with help of a second pin, which is passed through the opposing radial through holes of the outer tube as well as the lengthwise extending slots of the inner tube; the shock absorbing mechanism being connected to the first and the second pins respectively at two ends thereof for reducing shaking of the seat.

2. The shock absorber of a seat of a wheelchair as claimed in claim 1, wherein a strengthening element, which has a through hole similar to the slots of the inner tube in shape, is tightly fitted in the slots of the inner tube, and the second pin is passed through the strengthening element; the strengthening element having a gap on a lower end, through which the shock absorbing mechanism is passed.

3. The shock absorber of a seat of a wheelchair as claimed in claim 2, wherein the shock absorbing mechanism is an elastic element.

4. The shock absorber of a seat of a wheelchair as claimed in claim 2, wherein the outer tube is formed with a pair of opposing radial through holes on a lower end portion thereof, and a third pin is passed through the radial through holes such that the inner tube is prevented from moving below the third pin.

5. The shock absorber of a seat of a wheelchair as claimed in claim 4, wherein the shock absorbing mechanism is an elastic element.

6. The shock absorber of a seat of a wheelchair as claimed in claim 1, wherein the outer tube is formed with plural pairs of opposing radial through holes along the upper end portion thereof in addition to the first pair for allowing the second pin to be selectively connected thereto, thus allowing the seat to be adjusted in height by means of relocating the second pin.

7. The shock absorber of a seat of a wheelchair as claimed in claim 6, wherein the shock absorbing mechanism is an elastic element.

8. The shock absorber of a seat of a wheelchair as claimed in claim 6, wherein a strengthening element, which has a through hole similar to the slots of the inner tube in shape, is tightly fitted in the slots, and the second pin is passed through the strengthening element; the strengthening element having a gap on a lower end, through which the shock absorbing mechanism is passed.

9. The shock absorber of a seat of a wheelchair as claimed in claim 8, wherein the shock absorbing mechanism is an elastic element.

10. The shock absorber of a seat of a wheelchair as claimed in claim 6, wherein the outer tube is formed with a pair of opposing radial through holes on a lower end portion thereof, and a third pin is passed through the radial through holes such that the inner tube is prevented from moving below the third pin.

11. The shock absorber of a seat of a wheelchair as claimed in claim 10, wherein the shock absorbing mechanism is an elastic element.

12. The shock absorber of a seat of a wheelchair as claimed in claim 1, wherein the outer tube is formed with a pair of opposing radial through holes on a lower end portion thereof, and a third pin is passed through the radial through holes such that the inner tube is prevented from moving below the third pin.

13. The shock absorber of a seat of a wheelchair as claimed in claim 12, wherein the shock absorbing mechanism is an elastic element.

14. The shock absorber of a seat of a wheelchair as claimed in claim 1, wherein the shock absorbing mechanism is an elastic element.
--------------------------------------------------------------------------------

Description

--------------------------------------------------------------------------------

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a shock absorber of a seat of a wheelchair, which can reduce violent shaking of the seat effectively for the wheelchair to be comfortable to ride on.

[0003] 2. Brief Description of the Prior Art

[0004] Conventional wheelchairs for people to ride on are usually only equipped with shock absorbers between the wheels and the frame, but are not equipped with shock absorbers for the seats. Therefore, violent shaking of one such conventional wheelchair can't be effectively reduced, and a person ridding on the wheelchair will still feel uncomfortable when the wheelchair is shaking violently.

SUMMARY OF THE INVENTION

[0005] It is a main object of the present invention to provide a shock absorber of a seat of a wheelchair such that violent shaking of the seat can be effectively reduced.

[0006] The shock absorber of the present invention includes an outer tube secured on an upper side of a frame of the wheelchair, an inner tube secured on a bottom of the seat and movably passed into the outer tube, and a spring-loaded shock absorbing mechanism. The outer tube is formed with a pair of opposing radial holes on an upper end portion. The inner tube is formed with two opposing lengthwise extending slots, and is prevented from separating from the outer tube with help of a pin, which is passed through the radial holes as well as the slots; the shock absorbing mechanism is held in the outer tube and connected to the outer tube, and a lower end of the inner tube at lower and upper ends thereof respectively.

BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The present invention will be better understood by referring to the accompanying drawings, wherein:

[0008] FIG. 1 is a perspective view of the wheelchair according to the present invention,

[0009] FIG. 2 is an exploded perspective view of the present invention,

[0010] FIG. 3 is a vertical sectional view of the present invention, and

[0011] FIG. 4 is a vertical sectional view of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Referring to FIGS. 1 and 2, a preferred embodiment of a shock absorber of a seat 3 of a wheelchair includes an outer tube 6, a shock absorbing mechanism 8, and an inner tube 7.

[0013] The outer tube 6 is formed with several pairs of opposing radial through holes 61 along an upper end portion, and several pairs of opposing radial through holes 62 along a lower end portion thereof; the distance between every two adjacent upper holes 61 is the same as the distance between every two adjacent lower holes 62. A pin 64 is tightly passed through a selected pair of lower through holes 62.

[0014] The inner tube 7 is formed with two lengthwise extending slots 71, which are right faced with each other. A strengthening element 72 is tightly fitted in the slots 71, which has a through hole having the same shape as the slots 71, and a gap 721 at a bottom side thereof. The inner tube 7 is up and down movably passed into the outer tube 6, and a pin 63 is passed through the through hole of the strengthening element 72 and a selected pair of upper through holes 61; thus, the inner tube 7 can't separate from the outer tube 6, and it can only be displaced relative to the outer tube 6 within a certain range. And, the pin 64 at the lower portion of the outer tube 6 will stop the inner tube 7 to prevent the same from moving further down.

[0015] The shock absorbing mechanism 8 includes an elastic element 81, which is passed through the gap 721 of the strengthening element 72, and hooked over the pin 63 at a first end 811 thereof. In addition, a locating pin 73 is secured on a lower end of the inner tube 7, and the elastic element 81 is hooked over the locating pin 73 at a second end 812 thereof.

[0016] Thus, when the seat 3 of the wheelchair moves upwards and downwards during shaking of the wheelchair, the elastic element 81 will counteract movement of the seat 3. Consequently, the wheelchair will be more comfortable to ride on.

[0017] From the above description, it can be easily understood that the shock absorber of the present invention can reduce violent shaking of the seat effectively when one is ridding on the wheelchair.

Related Patent
Patent NO. Wheelchair Patent Title
20060061067 Manually operable standing wheelchair
20060055550 Wheelchair and alarm therefor
20060055143 Rear wheel mount and optional suspension for wheelchair
20060045686 Mechanism for insertion of a wheelchair into a car
20060038360 Stair-climbing wheelchair carrier
20060032417 Modular tube and table retrofitable to a wheelchair
20060027619 Driver accessible wheelchair carrier
20060022504 Air fluidized granular wound care wheelchair overlay
20060021806 Obstacle traversing wheelchair
20060018743 Wheelchair access system with stacking platform
20060016651 Shock absorber of a seat of a wheelchair
20060016648 Shock absorber of a seat of a wheelchair
20060012147 Stand-up wheelchair with gearing down of the stand-up operation
20060012146 Wheelchair with foot rest
20060011421 Automatic wheelchair brake system and wheelchair including same
20060000664 Motorized apparatus for towing a wheelchair
20050279540 Adjustable wheelchair
20050279539 Electrical wheelchair with an electrical seat-rotating device
20050275322 Wheelchair accommodating system
20050275190 Wheelchair propulsion device
20050273920 Waste handling apparatus for wheelchair
20050269798 Device for securing a wheelchair, scooter, or transportable equipment
20050264073 Dynamic seat support for a wheelchair
20050257966 Adjustable anti-tip wheels for power wheelchair
 
 
Adjustable Bed
Air Curtain
Air Purifier
Auto Lift
Badge Holder
Balance
Blinds
Blister Packaging
Cable Lock
Cable Ties
Carpet
Caster Wheel
CCtv Camera
Cell Phone
Computer Desk
Computer Rack
Conference System
Conference Table
Copier
Counterfeit Detector
Credit Card
Dental Care
Desiccant
Digital Video Recorder
Domain Names
Dome Camera
Double Sided Tape
Electric Hoist
Electric Wheel Chair
Ethernet Switch
Exit Sign
Fire Extinguisher
First Aid Kit
Flow Meter
Forklift Truck
Garden Light
Garden Umbrella
Geogrid
Glue Gun
Hair Treatment
Hand Dryer
Health Care
Hearing Aid
Heat Shrink Tube
Infrared Camera
Infrared Thermometer
Ink
Ink Refill
Inkjet Cartridge
Insurance
Investment Casting
Juice
Juice Extractor
Kitchen Faucet
Laminate Flooring
Lanyard
Laptop
Laser Engraving Machine
Latex Gloves
LED Display
Linear Bearing
Massage Chair
Massage Table
Mattress
Mattress Pad
Mechanical Balance
Memory Foam Pillow
Microscope Camera
Mini Flashlight
Modem Card
Nitrogen Generator
Office Chair
Office Furniture
Pallet
Paper Shredder
Patch Cord
PCB
Personal Care
Photo Paper
Portable Vacuum Cleaner
Power Cord
Powered Wheelchair
Printed Circuit Board
Printed Tape
Printer Ribbon
Printing Machine
Projector
Radiant Heat
Radiant Heating
Rechargeable Flashlight
Rewinding Machine
Roll Label
Safety Vest
Security Door
Self-adhesive Label
Shopping Cart
Skin Care Product
Skin Cream
Spiral Staircase
Stereo Microscope
Storage Box
Storage Racks
Temperature Controller
Terminal Blocks
Thermocouple
Toner Cartridge
Towel Dispenser
Treadmill
Venetian Blind
VoIP Phone
Walkie Talkie
Water Filter
Wheel Chair
Wheelchair
Wire Shelving
Wood Flooring
Wristbands
Quick Index
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z