FR2505413A1 - MANUAL PUMP WITH REDUCABLE TRANSVERSAL SIZE - Google Patents

Abstract

MANUAL PUMP CONSTITUTED BY A CYLINDRICAL BODY 11 IN WHICH A PISTON 12 SLIDES BY A ROD 13 ACTIVATED BY MEANS OF AN EXTERNAL HANDLE 14, CHARACTERIZED BY THE FACT THAT THE said HANDLE 14 IS MOUNTED ON THE ROD 13 SOONLY REMOVABLE TO BE REMOVABLE. IN THE CYLINDRICAL BODY 11, THE BASE OF THIS BODY BEING EXTENDED BY A LEG 25 ENDING WITH A FOOT 26 WITH TRANSVERSAL DIMENSIONS NOT GREATER THAN THE DIAMETER OF THE BODY 11 AND PRESENTING SUPPORTING SURFACES 27, 28 FOR THE FEET OF THE OPERATOR. THE INVENTION APPLIES TO THE INFLATION OF CANOES.

Description

The present invention relates to a manual pump

  whose transverse size can be reduced.

  There are hand pumps that are essentially

  A cylindrical body in which slides a piston pushed by a rod actuated by means of an external handle At the base of this body are arranged two projecting fins on which the operator places his feet to press the pump against the ground during pumping. These hand pumps are normally used to inflate the inner tubes of canoes, tires, etc. In these pumps, the handle and the fins make

  protrusion, transversely, with respect to the cylindrical body

  that, often significantly This is necessary for

  to be able to operate the handle and to have

  sufficient bearing surfaces for the feet.

  This transverse bulk has, however, disadvantages.

  For the packaging of this product, for example

  ple, it is necessary to provide a package with a volume substantially greater than the volume of the cylindrical body

  of course, a high transport cost per unit of pro-

duit transported.

  In addition, the pump operator must have his own

  position a space bigger than the bulk of the body

  cylindrical, both in the case where it has to

  only in case he has to put it somewhere.

  The present invention aims to remedy these

  disadvantages by proposing a manual pump whose

  cross-beaming can be reduced.

  This object is achieved by producing a manual pump of the type constituted by a cylindrical body in which slides a piston pushed by a rod actuated by means of an external handle, characterized in that said handle is removably mounted on the rod. to be housed in the cylindrical body, the base of this body being extended by a leg completed

  by a foot having transverse dimensions not greater than

  than the diameter of the body and having

  support for the operator's feet.

  The features and advantages of the present invention will be better understood from reading the description of the invention.

  of a preferred embodiment of this invention.

  tion, given below as an example and illustrated by

the attached drawings.

  In these drawings Figure 1 is an elevational view of the hand pump according to the invention, in the working position;

  FIG. 2 is a sectional view along line II-

II of the pump of Figure 1;

  FIG. 3 is a partial sectional view, enlarged

  die along the line III-III of the pump of Figure 1, and Figure 4 is a partial sectional view along the arrow F of the pump of Figure 1, in the rest position. By way of non-limiting example, is designated by the reference (10), in these figures, a single-acting manual pump essentially consisting of a cylinder (11) in which slides a piston (12) pushed by a rod (13). )

  operated by means of an external handle (14).

  The cylinder (11) is closed at the top by a cover (15) screwed onto this cylinder The cover (15) has at its center a mouth (16) through which slides

the rod (13).

  The handle (14) is screwed onto the free end

  stem (13) This handle (14), at the level of

  its threaded fastening (17) allowing the screwing on the ex-

  free end of the rod (13), has a passage (18) which communicates with the outside, by an outlet neck (19) of the handle (14), an internal longitudinal channel (20) of the rod ( 13), which, for this purpose, has a tubular shape This channel (20) communicates, through its lower part, through a non-return valve (21),

  with one of the two lower chambers (22) and above

  re (23) determined by the piston (12) in the cylinder (11), ie the chamber (22) The valve (21) allows the passage of an air flow from the lower chamber (22) to the channel ( 20)

but not the other way around.

  The cylinder (11) is closed at the bottom by a cover (24), screwed on this cylinder, of a diameter equal to that of the cover (15). The cover (24) is extended downwards by a leg (25). ) which ends with a circular foot

  (26) This foot (26) has two surfaces (27 and 28)

  placed on opposite sides of the leg (25) in the upper part of the leg (25) is

  arranged a suction duct (29), one end of which

  with the lower chamber (22) by an anti-tamper

  back (30), while the other end communicates with

  the outside through a filter (31) The valve (30) allows

  puts the passage of an air flow duct (29) to the lower chamber (22) but not the reverse The maximum transverse dimension of the assembly Leg (25) foot (26), a species diameter foot is equal to the dimension

  cross-section of the pump (10), deprived of the

  (14), in this case the diameter of the lids (15 and

24) of the cylinder (11).

  Thus, a pump with a transverse space, which is reducible in practice, is made to the diameter of the body of the

pump itself.

  In the working position, the handle (14) is mounted

  on the rod (13), as shown in the figure

  gure 1 For pumping, the operator presses one foot on the surface (27) and the other foot on the surface (28), in order to press the pump against the ground during pumping. He then grasps the handle (14) and, using the rod

  (13), raises the piston (12) to the upper end

  The air in the chamber (23) is expelled,

  in this phase, through the openings (32) of the neck

  upper vane (15) In this phase, moreover, the outside air is sucked into the chamber (22) through the valve (30). The operator then pushes down the handle (14), and thus the piston ( 12) until the end of ns stroke, and the air contained in the chamber (22) is sent through the valve (21), the channel (20), the passage (18)

  and the neck (19) in a tube (33) partially

  felt - mounted on the neck (19) and connected to an air chamber to inflate, not shown These pumping movements are repeated until the air chamber is inflated

at the desired pressure.

  In the rest position, the handle (14) is unscrewed from the rod (13). The upper lid (15) is, in turn,

  unscrewed from the cylinder (11) and the handle is placed

  the cyclider in the chamber (23), where it will become

  at one of its ends on the piston (12), housed between the rod (13) and the inner wall of the cylinder (11). The lid (15) is then screwed onto the cylinder (11) and

  the free end of the rod (13) is closed with a bolt

  chon (34) The pump (10) is then in the form

  of Figure 4 As can be seen, the transverse

  sal is reduced to the diameter of the covers (15) and (24) of the

cylinder (11).

  When the pump (10) is to be packed, or when the pump (10) is to be stored somewhere and it is desirable for it to occupy a limited space, this reduction in space is very advantageous.

  to limit the volume of its packaging or storage.

  The handle (14) has, on its upper part, a threaded orifice (35), normally closed with a threaded plug (36), which puts the passage (18) in communication with

  outside; this hole is intended to receive the

Threaded cord of a manometer.

  In the rest position, it is possible to place inside the cylinder (11) not only the handle (14),

  but still accessories such as the tube (33)

  sound between the neck (19) and the air chamber to inflate.

  The present embodiment described by way of example is not limited to the invention. In particular, the shape of the handle (14), the leg (25) and the foot (26) can be modified. to provide a discharge channel (20) in the rod (13), can be provided in the leg (25) a discharge pipe similar to the suction duct (29), and opposed thereto, with a check valve -return that allows the passage of an air flow from the chamber (22) to said discharge pipe opening outwardly on the leg (25) Of course, the leg (25) must be modified adequately to maintain,

  in the rest position of the pump (10), the transient

  Versal reduced already mentioned It is possible to arrange the suction and discharge ducts in other positions, just as it is possible to apply what has been described to the realization of a double-acting manual pump with means simple, within reach of a technician

from this area.

Claims (7)

claims:   1. Manual pump constituted by a cylindrical body   (11) in which slides a piston (12) pushed by a rod (13) actuated by means of an external handle (14), characterized in that said handle (14) is mounted on the rod (13) removably to be housed in the cylindrical body (11), the base of this body being extended by a leg (25) ending in a foot (26)   with transverse dimensions not greater than the diameter   body meter (11) and having bearing surfaces (27, 28) for the operator's feet.   2. Manual pump according to claim 1, characterized   characterized by the fact that said cylindrical body (11) is   closed at the top by a removable cover (15), which pre-   an opening (16) through which the said rod (13).   3. Manual pump according to claim 2, characterized   characterized in that said handle (14) and said cover (15) are coupled by screwing respectively   at said rod (13) and said cylindrical body (11).   4 Manual pump according to claim 1, characterized   terized by the fact that said foot (26) has two sur-   inclined bearing faces (27, 28) arranged on two sides   opposed to said leg (25).   5. Manual pump according to claim 1, characterized   characterized by the fact that said leg (25) has a   suction duct (29) communicating, inside said cylindrical body, through a non-return valve (30), with one of the two chambers, lower (22) and upper (23), determined by said piston (12) in the said body   cylindrical (11), the lower chamber (22).   6. Manual pump according to claim 5, characterized   characterized in that said rod (13) is tubular in order to provide, inside, a discharge channel (20) whose one end communicates, by means of a non-return valve (21), with said lower chamber (22), and whose other end communicates with a passage (18) of said handle (14) opening on an outlet neck (19) of said handle (14), said cylindrical body   (11) have, at its upper end, openings   exhaust pipes (32) of the fluid contained in said upper chamber (23).   7. Manual pump according to claim 6, characterized   characterized in that said handle (14) has a hole (35) for communicating said passage (18) with the outside, closed by a removable plug (36) provided for   receive a connection element to a manometer.