US3548443A - Rotary door closer with fluid check - Google Patents

Rotary door closer with fluid check Download PDF

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Publication number
US3548443A
US3548443A US754211A US3548443DA US3548443A US 3548443 A US3548443 A US 3548443A US 754211 A US754211 A US 754211A US 3548443D A US3548443D A US 3548443DA US 3548443 A US3548443 A US 3548443A
Authority
US
United States
Prior art keywords
piston
cylinder
door
fluid
door closer
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 - Lifetime
Application number
US754211A
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English (en)
Inventor
Toimi Rassa
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.)
Wartsila Oy AB
Original Assignee
Wartsila Oy AB
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 Wartsila Oy AB filed Critical Wartsila Oy AB
Application granted granted Critical
Publication of US3548443A publication Critical patent/US3548443A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
    • E05F3/04—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes
    • E05F3/08—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes in which a torsion spring rotates a member around an axis arranged in the direction of the axis of the piston
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/25—Mechanical means for force or torque adjustment therefor
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
    • E05Y2900/13—Type of wing
    • E05Y2900/132—Doors

Definitions

  • a door closer comprises a fixed piston and a cylinder threada'bly engaged on the piston for rotation thereon.
  • the cylinder is open upwards and receives the piston in its open part.
  • the door closer is further provided with spring means acting on said cylinder to urge it into a position in which the door is closed, and a fluid system means between the piston and the cylinder to regulate the speed of the spring actuated closing movement of the door closer.
  • the invention relates to a spring actuated, fluid braked door closer, comprising a piston and a cylinder threaded on the piston for movement relative thereto.
  • Known door closers are usually rather large and heavy or they may be of a very simple construction braking the closing movement of the door only in the last phase of this movement.
  • the object of the invention is to provide a continuously braking door closer of a compact and simple but still reliable construction.
  • the invention is characterized in that the cylinder of the door closer is open upwards and in its open part receives the piston, the cylinder being connected to turning arms transmitting the movement of the door in the form of a turning movement to the cylinder.
  • the turning arms can be attached to the lower part of the door closer and this makes it possible to obtain an advantageous construction.
  • the cylinder is the lower part and closed at its bottom, the door closer is leakproof and also easy to attach.
  • a door closer according to the invention should preferably be attached to the door frame, but it may also be attached to the door.
  • a substantially closed fluid chamber is arranged inside the piston, and this fluid chamber is connected in a way known per se through a non-return valve to a compression chamber in the cylinder below the piston. From the compression chamber fluid is pressed back to the fluid chamber when the door is closed.
  • the available space within the door closer is used very effectively, and this results in very small outer dimensions of the door closer.
  • a return duct with adjustable throttling is arranged between the compression chamber below the piston and the fluid chamber in the piston.
  • the adjustable throttling may be obtained by means of a throttling screw attached at the upper part of the piston and turnable from the outside of the door closer. This construction makes it possible to obtain a throttling system which gives a practically constant closing speed at different temperatures.
  • the throttling in the return duct must increase with increasing temperature. This can be obtained by making the throttling screw for instance, of brass or any other material having a substantially higher thermal expansion than the material of the piston. This principle can be applied in throttling means of various consrtuetions.
  • FIG. 1 indicates a cylinder, 2 a piston and 3 a thread engaging the piston to the cylinder, and providing axial movement between the piston and the cylinder when they are turned relatively each other.
  • the piston 2 there is a fluid chamber 4 and below the piston a compression chamber 5.
  • the upper part of the piston 2 is formed as an attachment plate 6 which can be attached to the door frame.
  • the cylinder 1 is provided with a turning arm 7 which in a manner known per se is connected to another turning arm (not shown) which in turn is attached to the door. When the door is opened, the cylinder 1 is turned by the turning arm 7. Turning of the cylinder also moves it downwards relative to the piston and this causes fluid to flow from the fluid chamber 4 through a non-return valve 8 to the compression chamber 5.
  • the torsion spring 9 at the door closer urges the cylinder 1 back to its initial position relative to the piston 2, and this movement forces fluid to flow from the compression chamber 5 back to the fluid chamber 4.
  • the returning fluid may entirely or partly be led through a constant throttling means formed by the slot between the piston and the cylinder and by an opening 11 in the piston wall.
  • a return duct 12 with an adjustable throttling.
  • the throttling means of the return duct comprises a screw 13 which is threaded in the upper part of the piston and provided with a setting arm 14 extending along the upper part of the piston and operable at the edge of said upper part.
  • the screw 13 can be made of a material with a substantially greater thermal expansion than the piston 2. Upon increasing temperure, the screw 13 will then expand more than the piston 2 and hence the throttling in the return duct 12 is increased without operation of the setting arm 14. The viscosity of the fluid in the door closer has decreased, however, due to the increased temperature and hence compensates the increased throttling whereby the closing speed of the door closer remains substantially unchanged.
  • a door closer comprising a piston, a cylinder threadably engaged on said piston for relative rotation thereon, said cylinder having a closed bottom and an open top, the piston extending within the cylinder through the open top thereof, turning arms connected to said cylinder for transmitting turning movement of a door as relative rotation between said piston and cylinder, spring means acting between said piston and cylinder to resist relative turning thereof by said turning arms and to urge the piston and cylinder to a relative rest position in which the door is closed, and fluid system means between said piston and cylinder to resist relative movement of said cylinder and said piston during return to said rest position.
  • a door closer as claimed in claim 5 comprising a setting arm on said throttling screw extending along the door closer at the upper side thereof.
  • said adjustable throttling means comprises a throttling member having a higher coefficient of thermal expansion compared to said piston to produce increased throttling in said return duct due to increased temperature, said throttling member being threadably attached to said piston at a substantial distance from said return duct.

Landscapes

  • Closing And Opening Devices For Wings, And Checks For Wings (AREA)
  • Fluid-Damping Devices (AREA)
US754211A 1967-08-21 1968-08-21 Rotary door closer with fluid check Expired - Lifetime US3548443A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI2224/67A FI42410B (fi) 1967-08-21 1967-08-21

Publications (1)

Publication Number Publication Date
US3548443A true US3548443A (en) 1970-12-22

Family

ID=8506819

Family Applications (1)

Application Number Title Priority Date Filing Date
US754211A Expired - Lifetime US3548443A (en) 1967-08-21 1968-08-21 Rotary door closer with fluid check

Country Status (6)

Country Link
US (1) US3548443A (fi)
DE (1) DE1784542A1 (fi)
FI (1) FI42410B (fi)
FR (1) FR1584395A (fi)
GB (1) GB1227248A (fi)
SE (1) SE344221B (fi)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4828236A (en) * 1987-02-04 1989-05-09 Nifco, Inc. Damper device for a door having dual-direction operating biasing spring means
US5604936A (en) * 1995-09-28 1997-02-25 Mausolf; Melvin J. Self-lowering toilet seat
US20120227212A1 (en) * 2009-08-27 2012-09-13 Joseph Talpe Door closing mechanism

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US805775A (en) * 1904-04-15 1905-11-28 George J Blum Door-check.
US1249190A (en) * 1914-06-10 1917-12-04 Paul Quentin Door check or closer.
US1837395A (en) * 1930-03-20 1931-12-22 Balton Charles Anastase Shock absorber
USRE18411E (en) * 1932-04-05 Shock absobbeb
US1881450A (en) * 1931-03-24 1932-10-11 Houde Eng Corp Shock absorber
US2226257A (en) * 1939-11-02 1940-12-24 Yale & Towne Mfg Co Door closer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE18411E (en) * 1932-04-05 Shock absobbeb
US805775A (en) * 1904-04-15 1905-11-28 George J Blum Door-check.
US1249190A (en) * 1914-06-10 1917-12-04 Paul Quentin Door check or closer.
US1837395A (en) * 1930-03-20 1931-12-22 Balton Charles Anastase Shock absorber
US1881450A (en) * 1931-03-24 1932-10-11 Houde Eng Corp Shock absorber
US2226257A (en) * 1939-11-02 1940-12-24 Yale & Towne Mfg Co Door closer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4828236A (en) * 1987-02-04 1989-05-09 Nifco, Inc. Damper device for a door having dual-direction operating biasing spring means
US5604936A (en) * 1995-09-28 1997-02-25 Mausolf; Melvin J. Self-lowering toilet seat
US20120227212A1 (en) * 2009-08-27 2012-09-13 Joseph Talpe Door closing mechanism
US8752244B2 (en) * 2009-08-27 2014-06-17 Joseph Talpe Door closing mechanism

Also Published As

Publication number Publication date
FR1584395A (fi) 1969-12-19
GB1227248A (fi) 1971-04-07
FI42410B (fi) 1970-03-31
SE344221B (fi) 1972-04-04
DE1784542A1 (de) 1971-10-14

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