USRE34009E - Dropout assembly - Google Patents
Dropout assembly Download PDFInfo
- Publication number
- USRE34009E USRE34009E US07/652,562 US65256291A USRE34009E US RE34009 E USRE34009 E US RE34009E US 65256291 A US65256291 A US 65256291A US RE34009 E USRE34009 E US RE34009E
- Authority
- US
- United States
- Prior art keywords
- derailleur
- plate
- assembly
- dropout
- attachment
- 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 - Lifetime
Links
Images
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
- B62K25/02—Axle suspensions for mounting axles rigidly on cycle frame or fork, e.g. adjustably
-
- 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
- B62K19/00—Cycle frames
- B62K19/18—Joints between frame members
Definitions
- Bicycle frames have been manufactured according to fairly standard designs for many years. With the relatively recent advent of mountain bikes which are used or more rugged terrain having various obstacles, several problems have increasingly become apparent. Should a branch or other object somehow become lodged between the spokes of the rear wheel, the branch can tend to impart a high degree of fore-aft or lateral stress on the derailleur assembly which is, in turn, passed through the dropout to the rear frame assembly which, in turn, can often be bent or otherwise damaged.
- the dropout assembly of the instant invention is formed from a main plate which is attached by welding or other conventional construction to the seatstay tubes and the chainstay tubes of the bicycle frame.
- a dropout plate is thence attached by bolts, rivets, adhesive bonding or other fastening mechanism to the main plate and, the derailleur assembly, in turn, is fastened to the derailleur plate.
- both the main plate and the derailleur plate have areas of relative thinness adjacent the point where they are attached to one another.
- This thinned area in particular on the derailleur plate allows bending forces to bend or fracture the derailleur plate easily so that it may allow the main plate on the main portion of the bicycle frame to escape any harm.
- the fastening mechanism is designed to fail prior to imparting damaging stress to the frame.
- FIG. 1 is a side plan view of the instant invention.
- FIG. 2 is a plan view looking at the dropout of the instant invention from the rear of the bicycle.
- the dropout assembly 10 of the instant invention is designed for use with the bicycle having a chainstay tubes 12 and seatstay tubes 14.
- dropout assembly 10 is comprised of a main plate 16 to which is attached a derailleur plate 18 via an attachment means 20.
- Main plate 16 is, in the preferred embodiment, formed of an aluminum having a thickness of 5/16 of an inch at main area 16b.
- An attachment area 16a is an area of reduced thickness and represents the area to which derailleur plate 18 will be attached utilizing attachment means 20.
- Attachment area 16a in the preferred embodiment has a thickness of approximately 0.222 inches and is separated from main area 16b by a step 16c.
- derailleur plate 18 has an attachment area 18a of relatively reduced thickness.
- derailleur plate 18 is formed of stainless steel and the attachment area 18a thereof has a thickness of 0.090 inches.
- the derailleur area 18b of derailleur plate 18 has an enhanced thickness of about 3/16 of an inch and is separated from the attachment area 18a by step 18c.
- Located in derailleur area 18b is a hole 22 for attachment of derailleur assembly 24.
- Rear axle assembly may be inserted into the slot 26 formed by main plate 16 and derailleur plate 18.
- the dropout assembly of the instant invention is designed to fail just prior to frame damage under the two most common stress inducing situations.
- Arrow A in FIG. 1 shows a fore-aft force being exerted on attachment means 20 which are designed to yield just short of the stress which would bend or otherwise damage the frame.
- Arrow B in FIG. 2 shows a lateral force being exerted on the derailleur plate and assembly which will either cause yielding of attachment means 20 or bending or breaking of derailleur plate attachment area 18a.
- attachment means 20 need merely be drilled out or otherwise easily removed and the simple derailleur plate 18 replaced with a new one and fastened in place.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/652,562 USRE34009E (en) | 1988-10-12 | 1991-02-07 | Dropout assembly |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/256,656 US4856802A (en) | 1988-10-12 | 1988-10-12 | Dropout assembly |
US46596490A | 1990-01-16 | 1990-01-16 | |
US07/652,562 USRE34009E (en) | 1988-10-12 | 1991-02-07 | Dropout assembly |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/256,656 Reissue US4856802A (en) | 1988-10-12 | 1988-10-12 | Dropout assembly |
US46596490A Continuation | 1988-10-12 | 1990-01-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE34009E true USRE34009E (en) | 1992-07-28 |
Family
ID=27400979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/652,562 Expired - Lifetime USRE34009E (en) | 1988-10-12 | 1991-02-07 | Dropout assembly |
Country Status (1)
Country | Link |
---|---|
US (1) | USRE34009E (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8087686B1 (en) * | 2010-08-31 | 2012-01-03 | Ryan Michael Carroll | Bicycle drop out assembly |
US9248883B2 (en) | 2013-03-13 | 2016-02-02 | Specialized Bicycle Components, Inc. | Bicycle fork with compliant tip |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US570327A (en) * | 1896-10-27 | Bicycle | ||
GB189806504A (en) * | 1898-03-17 | 1899-01-28 | James Higham | Improvements in the Construction of Bicycles. |
FR518975A (en) * | 1920-07-05 | 1921-06-02 | Arthur Devaux | Quick-release bicycle lug device |
GB532353A (en) * | 1939-08-26 | 1941-01-22 | Coventry Eagle Cycle & Motor C | Improvements in and relating to means for securing wheel spindles to the frames of cycles and the like |
US4856802A (en) * | 1988-10-12 | 1989-08-15 | Schilplin Frederick C | Dropout assembly |
-
1991
- 1991-02-07 US US07/652,562 patent/USRE34009E/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US570327A (en) * | 1896-10-27 | Bicycle | ||
GB189806504A (en) * | 1898-03-17 | 1899-01-28 | James Higham | Improvements in the Construction of Bicycles. |
FR518975A (en) * | 1920-07-05 | 1921-06-02 | Arthur Devaux | Quick-release bicycle lug device |
GB532353A (en) * | 1939-08-26 | 1941-01-22 | Coventry Eagle Cycle & Motor C | Improvements in and relating to means for securing wheel spindles to the frames of cycles and the like |
US4856802A (en) * | 1988-10-12 | 1989-08-15 | Schilplin Frederick C | Dropout assembly |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8087686B1 (en) * | 2010-08-31 | 2012-01-03 | Ryan Michael Carroll | Bicycle drop out assembly |
US9248883B2 (en) | 2013-03-13 | 2016-02-02 | Specialized Bicycle Components, Inc. | Bicycle fork with compliant tip |
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Legal Events
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FEPP | Fee payment procedure |
Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
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FPAY | Fee payment |
Year of fee payment: 4 |
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REMI | Maintenance fee reminder mailed | ||
FEPP | Fee payment procedure |
Free format text: PETITION RELATED TO MAINTENANCE FEES FILED (ORIGINAL EVENT CODE: PMFP); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
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FPAY | Fee payment |
Year of fee payment: 8 |
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SULP | Surcharge for late payment | ||
FEPP | Fee payment procedure |
Free format text: PETITION RELATED TO MAINTENANCE FEES GRANTED (ORIGINAL EVENT CODE: PMFG); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |