GB1300015A - Base for adjustable chairs - Google Patents

Base for adjustable chairs

Info

Publication number
GB1300015A
GB1300015A GB34718/71A GB3471871A GB1300015A GB 1300015 A GB1300015 A GB 1300015A GB 34718/71 A GB34718/71 A GB 34718/71A GB 3471871 A GB3471871 A GB 3471871A GB 1300015 A GB1300015 A GB 1300015A
Authority
GB
United Kingdom
Prior art keywords
chair
shaft
motor
screw shaft
rotation
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
Application number
GB34718/71A
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.)
American Hospital Supply Corp
Original Assignee
American Hospital Supply Corp
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 American Hospital Supply Corp filed Critical American Hospital Supply Corp
Publication of GB1300015A publication Critical patent/GB1300015A/en
Expired legal-status Critical Current

Links

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
    • A47C3/36—Chairs or stools with vertically-adjustable seats with means, or adapted, for inclining the legs of the chair or stool for varying height of seat
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G15/00—Operating chairs; Dental chairs; Accessories specially adapted therefor, e.g. work stands
    • A61G15/02—Chairs with means to adjust position of patient; Controls therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
    • Y10T74/18576—Reciprocating or oscillating to or from alternating rotary including screw and nut

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Chairs Characterized By Structure (AREA)

Abstract

1300015 Vertically adjustable chairs AMERICAN HOSPITAL SUPPLY CORP 23 July 1971 [16 Feb 1971] 34718/71 Heading A4J [Also in Division F2] The base of a dentist's chair which may be raised manually or by transmission of power from a reversible motor 24 and locked against downward movement, comprises an upper frame 17 secured to the underside of the chair 11, a lower frame resting on, or secured to the floor, a pair of laterally spaced, inter-connected sets of linkage mechanisms 23a, (23b), Fig.4 (not shown) connected to the upper and lower frames and to a member 33 having a threaded bore through which a screw shaft 32 passes such that rotation of the screw shaft causes the member 33 to move axially along the shaft thereby expanding or contracting the linkage mechanisms which causes the chair to be raised or lowered. The screw shaft 32 is connected to the output shaft of the motor through a one-way clutch 35 and a reduction gear assembly 34, the one-way clutch allowing rotation of the screw shaft in the direction in which the chair is raised when the motor is de-energized thereby allowing for manual lifting of the chair and the reduction gearing preventing rotation of the shaft in the direction in which the chair is lowered when the motor is de-energized thereby locking the seat against downward movement. Lowering of the chair is effected by reversing the motor such that screw shaft 32 rotates, the chair exerting an axial force on member 33 thereby tending to increase the speed of rotation of shaft 32 which is limited or braked by the speed of the power-driven motor shaft 31 and output shaft 38.
GB34718/71A 1971-02-16 1971-07-23 Base for adjustable chairs Expired GB1300015A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11538471A 1971-02-16 1971-02-16

Publications (1)

Publication Number Publication Date
GB1300015A true GB1300015A (en) 1972-12-20

Family

ID=22361054

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34718/71A Expired GB1300015A (en) 1971-02-16 1971-07-23 Base for adjustable chairs

Country Status (4)

Country Link
US (1) US3698673A (en)
CA (1) CA947633A (en)
DE (1) DE2139579A1 (en)
GB (1) GB1300015A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2277257A (en) * 1993-04-21 1994-10-26 Hoskins Healthcare Ltd Height adjustable patient support; pivotal armrests

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3804460A (en) * 1972-05-30 1974-04-16 Pelton & Crane Co Power operated treatment chair
US3807680A (en) * 1972-09-14 1974-04-30 Sybron Corp Elevating mechanism for dental chairs and the like
DE2251808C3 (en) * 1972-10-21 1984-09-06 Siemens AG, 1000 Berlin und 8000 München Dental chair with parallelogram support arm
US4173372A (en) * 1977-10-11 1979-11-06 Gary Reynolds Dental chair
US4448382A (en) * 1982-08-16 1984-05-15 Smith Investment Company Power operated chair lift mechanism
US5466046A (en) * 1988-05-20 1995-11-14 La-Z-Boy Chair Co. Linear actuation drive mechanism for power-assisted chairs
US5651580A (en) * 1988-05-20 1997-07-29 La-Z-Boy Chair Company Linear actuation drive mechanism for power-assisted chairs and base therefor
US5482350A (en) * 1988-05-20 1996-01-09 La-Z-Boy Chair Company Linear actuation drive mechanism for power-assisted chairs
US5061010A (en) * 1988-05-20 1991-10-29 La-Z-Boy Chair Co. Cam guide drive mechanism for power-assisted chairs and the like
US5259718A (en) * 1990-01-18 1993-11-09 The Serco Corporation Vehicle restraint
US5799922A (en) * 1996-10-15 1998-09-01 Seating Technologies, Inc. Low profile seat suspension
US5931532A (en) * 1997-02-03 1999-08-03 Kemmerer; Kenneth Lift recliner chair with safety system
JP2000014475A (en) * 1998-07-02 2000-01-18 Ohiro Seisakusho:Kk Barber's/beautician's chair
US6814409B2 (en) * 2001-04-12 2004-11-09 A-Dec, Inc. Hydraulic drive system
DE10120450A1 (en) * 2001-04-26 2002-10-31 Ina Schaeffler Kg Shaft rotatable by electric motor
GB0119132D0 (en) * 2001-08-03 2001-09-26 Seminar Components Uk Ltd Imrovements in and relating to adjustable chairs and beds
DE102005027375B3 (en) * 2005-06-14 2006-10-19 Recaro Aircraft Seating Gmbh & Co. Kg Seat used as an aircraft passenger seat comprises a seat part, a backrest and a shell element forming a partial enclosure of the seat part and/or the backrest
JP5047749B2 (en) * 2007-10-04 2012-10-10 日本トムソン株式会社 Small slide device
US7784871B2 (en) * 2007-12-26 2010-08-31 Dennis Cochran Occupational support system
US20100050523A1 (en) * 2008-08-26 2010-03-04 Helms James M Safety release mechanism for use with a linear motor turning a ball screw
USD792595S1 (en) * 2016-01-25 2017-07-18 Dongguan Weihong Hardware And Plastic Products Co., Ltd. Automatic support for headrest
US12004656B2 (en) * 2021-08-11 2024-06-11 Eric Brittingham Powered shop stool with kneeling mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2277257A (en) * 1993-04-21 1994-10-26 Hoskins Healthcare Ltd Height adjustable patient support; pivotal armrests

Also Published As

Publication number Publication date
US3698673A (en) 1972-10-17
DE2139579A1 (en) 1972-08-17
CA947633A (en) 1974-05-21

Similar Documents

Publication Publication Date Title
GB1300015A (en) Base for adjustable chairs
GB1348228A (en) Power-operated pedestal table and safety clutch therefor
GB1376411A (en) Brake
US4842233A (en) Lifting mechanism
GB1448238A (en) Chairs
FR2416673A1 (en) Child's seat with play action - has central support rod which, when extended, moves down on rotation of seat
GB1069764A (en) Improvements in or relating to adjustable articles of furniture for reclining or sitting
US3543598A (en) Driving means for vertical ball-roll spindles
GB1375931A (en) Adjustable height seat
CA2084242A1 (en) Disc brake for elevator drive sheave
SE8903411L (en) LIFTING DEVICE, SPECIFICALLY FOR PATIENT LIFTS
GB1516068A (en) Agitator unit with lift mechanism
ES8105609A1 (en) Spindle Drives
US2375172A (en) Work support adjusting mechanism for machine tools
GB1394622A (en) Device for adjusting the inclination and the height of a platform and especially a platform for supporting a seat
GB1152960A (en) Improvements in or relating to Automatic Brake Adjusters
US2969222A (en) No-back arrangement for ball screws
GB883964A (en) Hospital bed
ES439315A1 (en) Adjustable height bed
DE3664250D1 (en) Table or the like adjustable in height
GB1276255A (en) Improvements relating to chairs or seats primarily for use by infirm or invalid persons
CH303985A (en) Armchair with adjustable seat height.
GB1339204A (en) Anti-vibration mounting pad for a machine
GB1042826A (en) Radar system
JPH02198513A (en) Chair-raising or lowering device

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees