EP1582115A1 - Pompe pour ajuster la position verticale de l'assise d'une chaise - Google Patents

Pompe pour ajuster la position verticale de l'assise d'une chaise Download PDF

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Publication number
EP1582115A1
EP1582115A1 EP04425248A EP04425248A EP1582115A1 EP 1582115 A1 EP1582115 A1 EP 1582115A1 EP 04425248 A EP04425248 A EP 04425248A EP 04425248 A EP04425248 A EP 04425248A EP 1582115 A1 EP1582115 A1 EP 1582115A1
Authority
EP
European Patent Office
Prior art keywords
pump
cylinder
coupled
seat
operating lever
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.)
Withdrawn
Application number
EP04425248A
Other languages
German (de)
English (en)
Inventor
Andrea Carlo Marchesini
Luciano Ziggiotto
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.)
Lz Srl
PALLADIUM Srl
Original Assignee
Lz Srl
PALLADIUM Srl
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 Lz Srl, PALLADIUM Srl filed Critical Lz Srl
Priority to EP04425248A priority Critical patent/EP1582115A1/fr
Publication of EP1582115A1 publication Critical patent/EP1582115A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/30—Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/04—Hairdressers' or similar chairs, e.g. beauty salon chairs
    • A47C1/06—Hairdressers' or similar chairs, e.g. beauty salon chairs adjustable

Definitions

  • the present invention is about a pump for adjusting the vertical position of a chair seat, suitable in particular for being installed on chairs used in hairdresser or beauty salons to seat comfortably the customers.
  • the pump substantially comprises a cylindrical body which bounds an oil volume and which is connected to the base of the chair by a pumping device for sending the oil from the cylindrical body to a chamber when said pumping device is activated by an operating lever, protruding from the cylindrical body in order to be accessible for an operator.
  • a vertical axis shaft is placed in the chamber, connected to the bracket which supports the chair seat.
  • the adjustment of the vertical position of the seat is thus performed by the activation of the lever connected to the pump.
  • the hairdresser wants to lower the chair when the customer is seated thereon, he maintains the lever constantly pressed downward for a certain time, thus obtaining the descent of the seat.
  • a first device of known type essentially consists in the insertion of the wedge-shaped extremity of a rod connected to the operating lever into a ring, so that the external wall of said ring is expanded, placing close to the internal wall of the shaft enclosing it and connected to the chair seat, thus preventing any movement of said seat.
  • Another device of known type comprises a series of leverages and transmissions to block the movement of the shaft, always activated by the lever when it is moved upward.
  • the main inconvenience is due to their constructive complexity, determined by the numerous components which have to be mutually connected in different ways, usually by hinged fixing means.
  • the present invention intends to solve the above mentioned inconveniences.
  • the main object of the invention is to provide for a pump for adjusting the vertical position of a chair seat which is easier to manufacture with respect to the equivalent pumps of known type, especially regarding to the blocking device of the chair seat in the desired position.
  • a pump for adjusting the vertical position of a chair seat which, according to the contents of the main claim, comprises:
  • the pump of the invention is of easier conception with respect to the prior art, because the blocking device of the chair seat does not have a series of element mutually connected by fixing means of different kind.
  • the breakings at the blocking device are considerably reduced by the invention, especially with respect to the breakings occurring in the pumps of known type provided with the aforesaid leverages.
  • the invention allows to block in a safe and stable way the chair seat in the reached vertical position.
  • the pump of the invention allows an efficient and immediate raising of the seat when the operator presses the lever downward.
  • the pump of the invention is shown in Figures 1 and 2, where it is generally indicated with numeral 1 , in two different operative configurations.
  • FIG. 1 the pump 1 of the invention is shown in the well known configuration in which the operating lever 5 is lowered toward the base B of the chair to raise the seat S of the chair.
  • the subsequent Figure 2 shows the pump 1 of the invention in the configuration in which the operating lever 5 is raised toward the seat S of the chair, to bind it in a stable way in the reached position after the performance of subsequent pumping operations of the type shown in Figure 1, which have taken the seat S at that height.
  • the pump 1 comprises:
  • the blocking means 8 comprise a thrust body 9 , visible starting from Figure 3 only, interposed between the internal surface 7b of the cylinder 7 and eccentric means, generally indicated with numeral 10 , belonging to the operating lever 5 and able to force the thrust body 9 against the cylinder 7 when the operating lever 5 is brought near to the seat S .
  • the pumping means 4 comprise a piston 11 , partially surrounded by a spring 12 along its length, coupled with a check valve 13 consisting in this case of a little ball disposed at the feeding path 14 of the oil from the tank 3 to the chamber 6 .
  • the shaft 16 is generally shown in Figure 4, where the eccentricity of the cylindrical element 18 with respect to said shaft 16 (see the longitudinal axis Z and Z') and the above mentioned arm 17 and thrust extremity 17a are clearly visible.
  • eccentric means 10 comprise a cylindrical element 18 obtained in the substantially intermediate position 16a of the shaft 16.
  • This cylinder 7 is inserted in its turn in a second through hole 20 obtained in the shaped body 15.
  • the operating lever 5 is coupled at the opposite ends 16b, 16c of the shaft 16 by fixing means, generally indicated with numeral 23 and of known type, consisting for example in this case by a couple of dowels.
  • the piston 11 is inserted at its turn in a third through hole 24, which has a longitudinal axis Y' parallel to the vertical axis Y of the cylinder 7, obtained in the shaped body 15 from which it protrudes for a portion 11a.
  • the shaped body 15 has the shape shown in Figure 5, in which the three above mentioned through holes 19, 20 and 24 are evidenced.
  • the thrust extremity 17a of the arm 17 acts on the upper part of the portion 11a of the piston 11 when the operating lever 5 is pressed toward the base B in order to raise the seat S of the chair.
  • Figures 5, 6 and 7 show that the shaped body 15 has a through opening 21 formed at a portion of the wall 15a, which divides the first through hole 19 from the second through hole 20, arranged to house the thrust body 9 in order to dispose it in front of the cylinder 7 and the cylindrical element 18 belonging to the shaft 16.
  • the through opening 21 has a cross sectional rectangular profile.
  • the thrust body 9, already visible in Figure 3, comprises a little plate 22 made of frictional material, preferably but not necessarily bronze, which, together with the material forming the cylinder 7 cooperating therewith, that is chromiumplated and rectified aluminium, forms a coupling between two surfaces which gives a great stability to the blocking of the cylinder 7.
  • the material of the little plate 22 is particularly wear resistant: in fact, from experimental laboratory tests, it was verified that the little plate 22 has a wear of about 0,2 mm after being submitted to about 40.000 thrust cycles, this being an aspect which is a guarantee of extremely high functionality during time.
  • the little plate 22 is provided with a curved wall 22a which is coupled to the external wall 7c of the cylinder 7, and with a linear wall 22b opposed to the curved wall 22a, which delimitates the first through hole 19.
  • the hairdresser who performs the hairstyle of the customer's head raises the seat S of the chair by pressing downward, with repeated but alternating movement of the foot, the operating lever 5, as shown in Figure 1, to take the seat S of the chair to the desired position.
  • the pump 1 works in a well known way for the technician expert in the related field, with the oil flow pushed by the pumping means 4, moved at their turn by the thrust extremity 17a of the arm 17 from the tank 3 to the chamber 6 where the cylinder 7 is raised.
  • the blocking is obtained by the rotation in anticlockwise direction of the shaft 16, which disposes the cylindrical element 18 eccentric therewith against the little plate 22, thus being pressed against the external wall 7c of the cylinder 7.
  • the little plate 22 thanks to the characteristics of the material from which it is composed, maintains steady in position the cylinder 7, preventing it from any oscillation and displacement along its vertical axis Y.
  • the pump of the invention is extremely easy to manufacture, because the leverages and the fixing means used to connect them, usually employed in the equivalent pumps of known type, are removed.
  • the blocking action is particularly efficient, because of the utilization of materials with high friction factor forming the thrust body which acts on the cylinder connected to the chair seat.
  • the action of the blocking means is fluid and immediate, avoiding to raise the operating lever several times to obtain an efficient brake for the movable cylinder.
  • Modifications to the pump of the invention could be introduced in the production stage, consisting for example in a different shape of the operating lever or the pumping means which send the oil in the chamber where the cylinder connected to the chair seat slides.
  • the material used to make the thrust body could be different from the above described one, without reducing the advantages provided by the present patent.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Reciprocating Pumps (AREA)
EP04425248A 2004-04-02 2004-04-02 Pompe pour ajuster la position verticale de l'assise d'une chaise Withdrawn EP1582115A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04425248A EP1582115A1 (fr) 2004-04-02 2004-04-02 Pompe pour ajuster la position verticale de l'assise d'une chaise

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04425248A EP1582115A1 (fr) 2004-04-02 2004-04-02 Pompe pour ajuster la position verticale de l'assise d'une chaise

Publications (1)

Publication Number Publication Date
EP1582115A1 true EP1582115A1 (fr) 2005-10-05

Family

ID=34878381

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04425248A Withdrawn EP1582115A1 (fr) 2004-04-02 2004-04-02 Pompe pour ajuster la position verticale de l'assise d'une chaise

Country Status (1)

Country Link
EP (1) EP1582115A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1671193A (en) * 1926-09-24 1928-05-29 Koenigkramer Frank Hydraulic lift
US3230712A (en) * 1963-03-21 1966-01-25 Emil J Paidar Company Manual hydraulic jack
US3763651A (en) * 1970-07-10 1973-10-09 M Okiyama Seat lifting device for use in barbers or beauty parlors and medical facilities
GB1420164A (en) * 1972-03-23 1976-01-07 Stabilus Gmbh Arrangement of a telescopic column

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1671193A (en) * 1926-09-24 1928-05-29 Koenigkramer Frank Hydraulic lift
US3230712A (en) * 1963-03-21 1966-01-25 Emil J Paidar Company Manual hydraulic jack
US3763651A (en) * 1970-07-10 1973-10-09 M Okiyama Seat lifting device for use in barbers or beauty parlors and medical facilities
GB1420164A (en) * 1972-03-23 1976-01-07 Stabilus Gmbh Arrangement of a telescopic column

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