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Publication numberUS979483 A
Publication typeGrant
Publication dateDec 27, 1910
Filing dateApr 30, 1910
Priority dateApr 30, 1910
Publication numberUS 979483 A, US 979483A, US-A-979483, US979483 A, US979483A
InventorsWilliam S Harley
Original AssigneeWilliam S Harley
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Spring-seat post.
US 979483 A
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Description  (OCR text may contain errors)




Patented Dec. 27, 1910.


Application filed April 30, 1910. Serial No. 558,598

' -T all whom it may concern:

. Spring-Seat Posts; and I do hereby declare angle to-Fig. 1.

that, the following is a fIIlL'ClGZIE, andexact description thereof.

hly inventitin has for its object to provide a resilient seat support for motorcycles, b1- cycles or like vehicles, the construction and arrangement being such that the required amount ,ofresiliency is obtained, while"at the same time rigidity in a lateral direction insured and-back lash due to compression compensated for. r I

li ith these objects in View the invention consists in certain peculiarities of construction and combination ofparts as set forth hereinafter with reference to the accompanying drawings and subsequently claimed.

In the drawings Figure 1 represents an elevation partly in section of a portion of a motorcycle frame provided with a seat support embodying the features of my invention; Fig. 2, a detail plan viewof the hinge connection between the saddle supporting bar and vehicle frame; and Fig. 3, a partially sectional detail View of the shackle connection, the section'being taken at a right Referring by characters to the drawings; 1 represents the top bar of a motorcycle frame,.which bar is supplemented by a second bar 2 arranged parallel thereto, these bars being in brazed connection with a Seat-mast 3. At a predetermined distance from the seat-mastthe top bar is bent and converges toward the lower bar forming an oblique section 4:, whereby the mouth of the seat-mast is lowered to a. point below the axis of the upper bar in order that the seat,

when placed in position, can be dropped to a convenient point.

The mouth of the mast has brazed therein a gland 5, into which gland is fitted a tubular well that is preferably composed of two sections, theupper section-6 being provided with a flanged end 7 'that rests upon the outer end of the gland, said flange being clamped to the gland by means of a flanged coupling member that is in screw-threaded connection with-a threaded shank/of the specification of Letters .Qatent.

gland. The lower end of the upper wel1 iatented Dec. 33?, 159.1%. i l

section (3 has brazed or otherwise secured thereto a collar 8, having a screwthremled extension for the ree ption of the corresp indiii e 'l vserew-threaded end of the lower tube section 9 of said well. This section of the well is closed at its bottom to form a reservoir 10, which. as shown. may. in some instances be partly filled. with oil if desired.

A rceiprocatirc sleeve post 11 is titled into the upper section of the well as shown, being provided with a head 12, that is brazed or otherwise secured thereto. the head being provided with ears for the reception of a pin 13, upon which pin is loosely mounted a bearing-block 1 3. The head has secured thereto a plunger-rod 1-1, which extends are closed by the disk when the plunger-rod rises.

Interposed between the upper face of the collar 8 and lower face of the head 12 is a coiled spring 18, which coiled spring surrounds the plunger and is adapted to support the load. A second coiled spring 19 is interposed between the lower face of the collar 8 andan adjustable nut and washer 20, the nut being in screw-threaded engagement withtheplunger-rod 14, whereby tension of the coiled spring 19 is adjusted simultaneously with adj ustmentof the upper spring 18.

The lower coiled spring 19 is provided for the purpose of cushioning the up-stroke'of the seat-post incidental to sudden depression thereof through shock, whereby shock to the rider is eliminated in either direction, it being understood that the adjustingnut 20 may be set in proportion to the weight of the rider, whereby the proper amount of resiliency is maintained.

Brazed or otherwise suitably secured to the top-bar 1 at the-junction of the oblique portion 4 and horizontal portion 1 is a bracket 21:, which bracket has extending therefrom an apertured car 22, for the reception of the crotched end 23 of a saddlebar'Q, the 'crotched end of the saddle -bar being provided: with' apertures through which a hinged pin 25 passes, the said hinged the ports and restricted vents.

.up-stroke or recoil of the post the piston pin being also passed through the aperture in the bracket ear.

' Adjacent to the rear end of the saddle-bar there 1s secured a bracket having a depend ing slotted car 245, into the slot of which car the hearing-block 1 3 is fitted. whereby the rear end of the sz'u'ldle-har is supported. By this shackle connect-ion the seat-post and bar are connected and held rigid in a lateraldirection while at the same time said connection will permit 'l'rec downward movement oi the seatpost within the mast due to play of the hlock l within the slot ol the car 26, and, shown in the drawing. the seat-post is in its highest pr.-.-.aition. being locked by the back of the block 13 engaging the farther end of the slot within the ear. The seat, not shown. is desi ncd to he supported upon the bar in any suitable position and can be adjusted thereon longitiulinally to suit the head however. will retard the movement. This is accomplished through the valve-disk 16, which closes the ports in the piston head and a partial vacuum between the piston head and bottom 10 of the reservoir is ol tained. which vacuiiui is slowly relieved through the restricted vcntsil? and thus the device serves as a shock-absorber in conjunction with the coiled spring 19, which spring g i l I l l l l l l l l is compressed upon tie up-stroke-of the I seat-post.

'v utilizing the hinged bar 2%, through which the load is applied to theseat-post, it is obvious that said seat-post can be reciprocatcd freely without binding and this bind ing' result would attain to the detriment of the movement were the load applied vertically and directly upon said post which, as shown, is obliquely inclined.

I claim:

1. in a, vehicle frame having a horizontally disposed bar. an oblique scat-mast in union with the frame-bar, a spring-conlrolled sleeve-post; in telescopic connection with the seat-mast. and a seat-bar pivotally secured to sa *1 iramc-har; the combination of head extending from the sleeve-post, a

pin carried by. the head, a hearing-block loosely inounted upon the pin and a bracket secured to these slotted ear, \Vlilllil which slot the hearingblock is fitted and adapted to have play.

2. In a vehicle frame-having a horizon: tally disposed her an oblique seat-mast in union with the iranie-bar, a spring-cons; trolled sleeve-post in telescopic connection with the scat-mast, and seat-bar pivotally secured to sai tramehar; die combination ofa head secured to the sleeve-post, ears ex; tending from the head, a pin carried by the cars, a hearing-block loosely mounted upon the pin between the 'ears, and abracket secured to the seat-bar having a depending slotted ear. within which. slot the bearing,- block is fitted and adapted to have play.-

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee in. the bounty of Milwaukee and State ofWis' cousin in the presence of two witnesses.

lVILLIhIi I S. HARLEY. Vil'nesses:

' MAY Downer,

Geo. W. YOUNG.

eloar havin a depending

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3891236 *Jan 24, 1973Jun 24, 1975Showa Manufacturing Co IncShock absorber for bicycles
US5044648 *Apr 18, 1989Sep 3, 1991Knapp Thomas DBicycle suspension system
US5380026 *Aug 5, 1993Jan 10, 1995Robinson; RussellBicycle shock absorber
US5382039 *May 24, 1993Jan 17, 1995Hawker; Michael J.Suspension device for a seat of a bicycle
US5397094 *Dec 23, 1992Mar 14, 1995Tokico, Ltd.Saddle supporting device
US5580075 *Nov 16, 1994Dec 3, 1996Rockshox, Inc.For a two-wheeled vehicle
US5704626 *Sep 5, 1995Jan 6, 1998Kesinger; Donald A.Suspension device for reducing transmission of shock through bicycle components
US5927738 *Aug 20, 1996Jul 27, 1999Kesinger; Donald A.Bicycle seat suspension system
US6202971 *Jun 28, 1999Mar 20, 2001Allen G. DuncanAdjustable height seat support
US6478278Aug 6, 2001Nov 12, 2002Allen Gary DuncanSeat support with adjustable height
US6585215Apr 3, 2001Jul 1, 2003Allen Gary DuncanAdjustable height seat support with suspension
WO1990012727A1 *Apr 18, 1990Oct 19, 1990Thomas D KnappBicycle suspension system
Cooperative ClassificationB62K25/04