GB579900A - Improvements in or relating to spring forks for motor cycles and the like - Google Patents

Improvements in or relating to spring forks for motor cycles and the like

Info

Publication number
GB579900A
GB579900A GB446044A GB446044A GB579900A GB 579900 A GB579900 A GB 579900A GB 446044 A GB446044 A GB 446044A GB 446044 A GB446044 A GB 446044A GB 579900 A GB579900 A GB 579900A
Authority
GB
United Kingdom
Prior art keywords
fluid
fork
tube
compression
fluid seal
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.)
Expired
Application number
GB446044A
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.)
Birmingham Small Arms Co Ltd
Original Assignee
Birmingham Small Arms Co Ltd
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 Birmingham Small Arms Co Ltd filed Critical Birmingham Small Arms Co Ltd
Priority to GB446044A priority Critical patent/GB579900A/en
Publication of GB579900A publication Critical patent/GB579900A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K25/00—Axle suspensions
    • B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
    • B62K25/06—Axle suspensions for mounting axles resiliently on cycle frame or fork with telescopic fork, e.g. including auxiliary rocking arms
    • B62K25/08—Axle suspensions for mounting axles resiliently on cycle frame or fork with telescopic fork, e.g. including auxiliary rocking arms for front wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K2201/00—Springs used in cycle frames or parts thereof
    • B62K2201/04—Helical springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K2201/00—Springs used in cycle frames or parts thereof
    • B62K2201/08—Fluid springs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

579,900. Motor-cycle forks. BIRMINGHAM SMALL ARMS CO., Ltd., PERKINS, H., and PERRIGO, A. E. March 8, 1945, No. 4460/44. [Class 136 (iii)] [Also in Group XXXII] A telescopic front fork comprises a fluid seal 17 on the lower end portion of an upper tubular member 1, a tube 25 movable with a lower tubular member 13 and having a series of ports 33 arranged normally above and below the fluid seal 17 to allow passage of fluid between the tubular members 1, 13, the construction of the fluid seal 17 being such as to prevent direct fluid flow from the member 13 to the member 1 on compression of the fork, but to allow direct fluid flow between them on extension of the fork. The fluid seal consists of a bush 17 having clearances 27 which are closed by a valve 19 under pressure of the fluid during compression of the fork. The damping is progressive since the number of ports 33 within the member 25 diminishes proportionally with compression. A piston 29 fixed to the tube 25 serves to expel fluid from the tube 1 on extension of the fork. During this action part of the fluid passes directly through the valve 19 and part through the holes 33, the damping thus being partly progressive. A spring 31 limits the recoil and a further spring (not shown) is mounted between a gland 21 and the lower of the two points at which the fork is secured to the steering head. The wheel axle is mounted in a lug 15. Specification 571,486 is referred to in connection with the construction of the gland 21.
GB446044A 1945-03-08 1945-03-08 Improvements in or relating to spring forks for motor cycles and the like Expired GB579900A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB446044A GB579900A (en) 1945-03-08 1945-03-08 Improvements in or relating to spring forks for motor cycles and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB446044A GB579900A (en) 1945-03-08 1945-03-08 Improvements in or relating to spring forks for motor cycles and the like

Publications (1)

Publication Number Publication Date
GB579900A true GB579900A (en) 1946-08-20

Family

ID=9777583

Family Applications (1)

Application Number Title Priority Date Filing Date
GB446044A Expired GB579900A (en) 1945-03-08 1945-03-08 Improvements in or relating to spring forks for motor cycles and the like

Country Status (1)

Country Link
GB (1) GB579900A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50114051U (en) * 1974-02-27 1975-09-17
US4012055A (en) * 1976-03-22 1977-03-15 Ottow Robert J Method and apparatus for extending a motorcycle fork
US4660687A (en) * 1985-01-11 1987-04-28 Oleo International Holding Limited Energy absorbers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50114051U (en) * 1974-02-27 1975-09-17
JPS5235804Y2 (en) * 1974-02-27 1977-08-15
US4012055A (en) * 1976-03-22 1977-03-15 Ottow Robert J Method and apparatus for extending a motorcycle fork
US4660687A (en) * 1985-01-11 1987-04-28 Oleo International Holding Limited Energy absorbers

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