US2027758A - Cycle - Google Patents

Description

P. ZUCKER' Jane 14, 1936.

CYCLE Filed Feb. 28, 1955' Patented J an. 14, 1936 UNITED STATES PATENT OFFICE Application February 28, 1935, Serial No. 8,767 In Switzerland December 18, 1933 7 Claims.

This invention relates to cycle frames and has for its object to provide improvements therein.

In some cases the cycle tyre pumps have hitherto formed a separate accessory and have been detachably connected to the. frame tubing, for example by means of spring clips.

In another instance the pump has been pivotally attached to the lower part of the seat tube by means of a tube clip and could be swung out from the top. In this case the pump had only to be swung out and connected to the tyre tube requiring inflation by means of the flexible connector tubing to be ready for operation.

It has also been proposed to provide cycle tyre pumps combined with the frame, but these are difiicult to operate.

These means did not prevent theft and loss of the pump on the way.

In the arrangement according to the inven- 1 tion these difficulties are eliminated.

According to. the invention the cycle frame which has combined therewith a tyre pump is provided with a slot adapted to guide the pump handle.

In the attached drawing various embodiments of the invention are illustrated by way of example.

Fig. 1 illustrates part of the pump according to one embodiment partly in elevation and partly in section, portions of a cycle necessary for the understanding of the invention being also shown.

Fig. 2 is a longitudinal sectional view taken on the line 11-29 of Fig. 1.

Fig. 3 shows a detail in elevation and inverted plan View.

Referring to Figs. 1 to 3 of the drawing, I indicates the seat tube and 2 the adjoining portions of the back stays at the top and of the chain stays at the bottom of the cycle frame. The seat tube forms the cylinder for a plunger 3 the plunger rod of which is replaced by a tube l terminating in a head piece 5. The diameter of the tube l substantially corresponds to the inner diameter of the seat tube, so that the members 3, d and 5 form a firmly guided sliding assembly. The head piece 5 is provided with a transverse passage 1 communicating with a guide slot 6 of the seat tube, an opening 8 being provided in the bottom of said passage 1. Wound around a pin 9 disposed underneath the passage 1 there is a coil spring it which has an arcuate portion extending into said opening 8 in the passage bottom and terminating in a loop. This loop projects through a longitudinal slot H in the tube 4 and presses against the inner face of the seat tube, while the ends of the spring are supported by the tube 4. The tension of the spring is such that it is capable of arresting the aforesaid sliding assembly at any point in the seat tube, while when the base of an operating handle is inserted into the'passage l, as described later, said base depresses that portion of spring l0 which extends through the opening 8, thereby withdrawing the looped end of said spring from the inner face of the seat tube I, so that the aforesaid sliding assembly is free to slide in the seat tube for the pumping operation. Owing to this arrangement in its uppermost arrested position determined by the guide slot in the seat tube the sliding assembly covers said slot and prevents the ingress. of dust and other foreign bodies through the slot 6.

In order that the difficult and lengthy operation of inserting and fixing the bottom in the seat tube may be avoided, a bottom formed of a rubber disc t2 armoured on both sides with metal discs is utilized. By contracting the metal plates with the aid of a bolt and nut connection Hi the diameter of the rubber disc is increased and its circumference caused to be applied under pressure against the inner face of the tube, whereby the said bottom is secured in position. The seat tube bottom so formed is capable of resisting the pressure of the column of air formed during the operation of the pump, so that the whole amount of the air may pass through the air discharge opening l4 provided for this purpose into the attached flexible transfer tube leading to the tyre tube. This bottom is easily fitted into any type of existing cycle.

The sliding assembly 3, 4, 5 is operated by a separate handle I5 which has a flat extension 55 adapted to be introduced into the passage 7 of the tube 4. To assure the antifrictional sliding of the handle along the slot 5 a ball 18 is loosely inserted into said flat handle extension at the point where it registers with the edges of the slot, said ball slightly projecting on either side from the broad-side of the flat extension. The grip I? of the handle is hollow and adapted to be closed by the screw on lid I9. The chamber thus formed may be utilized for holding repair outfits. The handle itself may be carried in the tool bag of the cycle.

What I claim is:

1. In a cycle, a pump connected with the cycle frame, a seat tube forming a cylinder for the plunger of the pump, a guide slot provided in said seat tube, this tube having an air discharge opening, a tube forming the plunger of the pump and having a passage communicating with said guide slot, a separate pump handle having a base, the said passage being adapted to receive said base, and means for anchoring the plunger tube in the seat tube.

2. In a cycle, a plunger pump connected with the cycle frame, a seat tube forming a cylinder for the plunger of the pump, a. guide slot provided in said seat tube, this tube having an air discharge opening, a tube forming the plunger of the pump and having a passage communicating with said guide slot, a separate pump handle having a base, said passage being adapted to receive said base, means for anchoring the plunger tube in the seat tube, said means comprising a coil spring wound on a pin underneath the passage, said passage having a bottom, one end portion of said spring projecting partly through the bottom of the passage, pressing against the inner face of the seat tube through a slot in the plunger tube, the other end portion of said spring being supported by the inner face of said plunger tube, in such manner that when the handle base is inserted into the passage the projecting end portion of the spring is depressed and thereby removed from the inner face of the seat tube, the, plunger tube thus being rendered slidable.

3. A cycle pump comprising, a tube of the cycle frame constituting a pump cylinder, at plunger tube substantially fitting and capable of reciprocation Within the cylinder, the cylinder being formed with a guide slot and an air discharge opening, the plunger having a passage therethrough adjacent one end, a handle traversing the slot and having its end portion disposed in the passage.

4. A cycle pump comprising, a tube of the cycle frame constituting a pump cylinder and formed with a guide slot and an air discharge opening, a plunger tube substantially fitting and reciprocal within the cylinder, a transverse passage formed in the plunger adjacent one ofv its ends, a handle fitting within the passage and extending outwardly through the slot, and spring means carried by the plunger whereby when the handle is inserted within the passage the plunger is free to move in the cylinder but with the handle removed relative movement of the cylinder and plunger is prevented by the spring means.

5. A cycle pump comprising, a portion of the cycle frame constituting a pump cylinder and formed with a guide slot and an air discharge opening, a plunger reciprocal within the cylinder, a passage formed in the plunger adjacent one of its ends, a handle fitting within the passage and extending outwardly through the slot, and spring means disposed within the plunger and operating therethrough for preventing relative movement of the plunger and cylinder when the handle is removed.

6. In a cycle pump, a cylinder forming a part of the cycle frame, a plunger tube reciprocal within the cylinder, and a spring disposed within the tube and normally having a portion projecting from the tube to engage the interior of the cylinder to prevent relative movement of the cylinder and plunger.

7. In a cycle pump, a cylinder forming a part of the cycle frame formed with a guide slot and an air discharge opening, a plunger tube reciprocal within the cylinder and formed adjacent one of its ends with a passage, a handle fitting within the passage and extending through the slot, and a spring disposed in the tube and normally projecting into the passage and engaging the inner wall of the cylinder, said spring being movable out of the passage and out of engagement with the cylinder upon movement of the handle into the passage.

PHILIPP ZUCKER.

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