GB2046870A - Plastics springs - Google Patents

Plastics springs Download PDF

Info

Publication number
GB2046870A
GB2046870A GB7838185A GB7838185A GB2046870A GB 2046870 A GB2046870 A GB 2046870A GB 7838185 A GB7838185 A GB 7838185A GB 7838185 A GB7838185 A GB 7838185A GB 2046870 A GB2046870 A GB 2046870A
Authority
GB
United Kingdom
Prior art keywords
spring
plastic
springs
present
truck
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB7838185A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gregg J D W
Original Assignee
Gregg J D W
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gregg J D W filed Critical Gregg J D W
Priority to GB7838185A priority Critical patent/GB2046870A/en
Publication of GB2046870A publication Critical patent/GB2046870A/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B33/00—Castors in general; Anti-clogging castors
    • B60B33/04—Castors in general; Anti-clogging castors adjustable, e.g. in height; linearly shifting castors
    • B60B33/045—Castors in general; Anti-clogging castors adjustable, e.g. in height; linearly shifting castors mounted resiliently, by means of dampers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/025—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant characterised by having a particular shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/366—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers made of fibre-reinforced plastics, i.e. characterised by their special construction from such materials

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Springs (AREA)

Abstract

A plastics spring has the form of a circle with a segment removed, the spring being stressed by forces tending to close or open the circle. The spring is injection moulded in reinforced nylon. The spring may be used in a hub or a castor, or as part of a wheelbarrow, platform, article of furniture, stand, truck or trolley. It may be moulded integrally with the article. <IMAGE>

Description

SPECIFICATION Improvements to plastic springs The object of the invention is to make a plastic spring that can give impact resistance to ground engaging vehicles and static machine.
The plastic spring is one that will become as well as a spring also part of the equipment that requires insulating from impact. If it is a wheelbarrow part of the wheel barrow, if a platform, furnishing or stand part of the platform, furnishing and stand. If a truck or trolley, part of the truck or trolley.
However, the spring can be part of a small fitment attached and holding the axle of a Trolley, Truck or Wheelbarrow and other things.
The plastic spring will be described as a circle of plastic with a segment cut from it giving the appearance of a circlip. The force closing or opening the circle of plastic where the segment was removed giving the tension and spring required. Reinforced maranyl (nylon) returns efficiently to its normal shape and would probably be the best plastic to use for these type of industrial springs.
How these springs are attached to each article required to be made impact resistant could be different in a number of cases. These cases would be where the spring and article has been injection moulded in the one operation.
Examples of the invention will now be described with reference to the accompanying drawings in which: Figure A is a side elevation of a spring fork according to the present invention Figure B is a side elevation of a spring fork according to the present invention.
Figure C is the end elevation of a single spring support or hub, according to the present invention.
Figure D is an exploded view of a spring support or hub according to the present invention.
Figure E is a side-elevation of a composite spring according to the present invention.
Figure F is a side elevation of support spring according to the present invention.
Figure Gis a side elevation of a support spring for mechanical purposes according to the present invention.
Figure H is a side elevation of a composite spring according to the present invention.
The springs shown on Figs. E and H could be used as dampers for vibration as well as for impact resistance. The same medium for impact resistance as shown on Figs. A, B, C and D are used on applications of "Improve- ments to Castors" No. 35782/78, and "Im- provements to Plastic and Steel Castors" No.
37101/78.
1. A plastic spring circular in shape, which is open ended having a segment missing.
The two open ends of the circular plastic spring could be attached integrally or otherwise to a component or separate components and the impact resistance given to the component or components would come from the expenditure of force required in closing the open ends of the plastic spring or in bypassing them.
2. A plastic spring as claimed in claim (1) but where one of the open ends of the spring has an extended arm attaching it to the axle of a wheel of a truck or wheelbarrow or the like, and the othr end of the spring is attached to the chassis of the truck or wheelbarrow, two springs being required for a wheel barrow, four or eight required for a truck.
3. A plastic spring as claimed in claim (1) but where the springs or a spring can be used in a castor to support the axle of the wheel or wheels.
4. A plastic spring as claimed in claim (1) but where a numerous number of plastic springs are combined integrally in a component.
5. A plastic spring as claimed in claim (1) but where the spring is used in the chassis of a light vehicle--bicycle or the like.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements to plastic springs The object of the invention is to make a plastic spring that can give impact resistance to ground engaging vehicles and static machine. The plastic spring is one that will become as well as a spring also part of the equipment that requires insulating from impact. If it is a wheelbarrow part of the wheel barrow, if a platform, furnishing or stand part of the platform, furnishing and stand. If a truck or trolley, part of the truck or trolley. However, the spring can be part of a small fitment attached and holding the axle of a Trolley, Truck or Wheelbarrow and other things. The plastic spring will be described as a circle of plastic with a segment cut from it giving the appearance of a circlip. The force closing or opening the circle of plastic where the segment was removed giving the tension and spring required. Reinforced maranyl (nylon) returns efficiently to its normal shape and would probably be the best plastic to use for these type of industrial springs. How these springs are attached to each article required to be made impact resistant could be different in a number of cases. These cases would be where the spring and article has been injection moulded in the one operation. Examples of the invention will now be described with reference to the accompanying drawings in which: Figure A is a side elevation of a spring fork according to the present invention Figure B is a side elevation of a spring fork according to the present invention. Figure C is the end elevation of a single spring support or hub, according to the present invention. Figure D is an exploded view of a spring support or hub according to the present invention. Figure E is a side-elevation of a composite spring according to the present invention. Figure F is a side elevation of support spring according to the present invention. Figure Gis a side elevation of a support spring for mechanical purposes according to the present invention. Figure H is a side elevation of a composite spring according to the present invention. The springs shown on Figs. E and H could be used as dampers for vibration as well as for impact resistance. The same medium for impact resistance as shown on Figs. A, B, C and D are used on applications of "Improve- ments to Castors" No. 35782/78, and "Im- provements to Plastic and Steel Castors" No. 37101/78. CLAIMS
1. A plastic spring circular in shape, which is open ended having a segment missing.
The two open ends of the circular plastic spring could be attached integrally or otherwise to a component or separate components and the impact resistance given to the component or components would come from the expenditure of force required in closing the open ends of the plastic spring or in bypassing them.
2. A plastic spring as claimed in claim (1) but where one of the open ends of the spring has an extended arm attaching it to the axle of a wheel of a truck or wheelbarrow or the like, and the othr end of the spring is attached to the chassis of the truck or wheelbarrow, two springs being required for a wheel barrow, four or eight required for a truck.
3. A plastic spring as claimed in claim (1) but where the springs or a spring can be used in a castor to support the axle of the wheel or wheels.
4. A plastic spring as claimed in claim (1) but where a numerous number of plastic springs are combined integrally in a component.
5. A plastic spring as claimed in claim (1) but where the spring is used in the chassis of a light vehicle--bicycle or the like.
GB7838185A 1978-09-27 1978-09-27 Plastics springs Withdrawn GB2046870A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7838185A GB2046870A (en) 1978-09-27 1978-09-27 Plastics springs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7838185A GB2046870A (en) 1978-09-27 1978-09-27 Plastics springs

Publications (1)

Publication Number Publication Date
GB2046870A true GB2046870A (en) 1980-11-19

Family

ID=10499915

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7838185A Withdrawn GB2046870A (en) 1978-09-27 1978-09-27 Plastics springs

Country Status (1)

Country Link
GB (1) GB2046870A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0051995A1 (en) * 1980-11-10 1982-05-19 Wheel Developments Limited Spring member

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0051995A1 (en) * 1980-11-10 1982-05-19 Wheel Developments Limited Spring member

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)