EP0262959A2 - Pneumatische Verriegelung mit handbetätigter Notentriegelung - Google Patents

Pneumatische Verriegelung mit handbetätigter Notentriegelung Download PDF

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Publication number
EP0262959A2
EP0262959A2 EP87308681A EP87308681A EP0262959A2 EP 0262959 A2 EP0262959 A2 EP 0262959A2 EP 87308681 A EP87308681 A EP 87308681A EP 87308681 A EP87308681 A EP 87308681A EP 0262959 A2 EP0262959 A2 EP 0262959A2
Authority
EP
European Patent Office
Prior art keywords
lock
bolt
key
operated
pinion
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Withdrawn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
EP87308681A
Other languages
English (en)
French (fr)
Other versions
EP0262959A3 (de
Inventor
Raymond Bushnell
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0262959A2 publication Critical patent/EP0262959A2/de
Publication of EP0262959A3 publication Critical patent/EP0262959A3/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B51/00—Operating or controlling locks or other fastening devices by other non-mechanical means
    • E05B51/02—Operating or controlling locks or other fastening devices by other non-mechanical means by pneumatic or hydraulic means

Definitions

  • the following invention relates to door locks and more particularly to pneumatically actuated locks for use in correctional facilities and the like.
  • Correctional facilities typically have door locks that operate by remote control.
  • a common system for use in such environments is a pneumatic system which is capable of retracting a lock bolt mounted on a door or a jamb from a cooperatively mating bolt receiver.
  • Pneumatic retractors of the type thus described, how­ever, have certain drawbacks, among these being the possibility of failure of the pneumatic system caused by a power failure or leakage in the pneumatic supply lines. It has therefore been necessary in the past to provide a manual override system by which the locks on the various doors in a correctional facility can be opened in the event of such a failure.
  • a typical example of such a manually operated retraction system might include a cylinder lock having a pulley and cable arrangement whereby the bolt is pulled back by a cable as the cylinder lock operates a pulley.
  • This type of system requires that proper tension be main­tained on the pulley and requires a large number of moving pieces which makes the lock mechanism more expensive and more difficult to operate manually because of increased friction.
  • the cable and pulley arrangement also takes up space and is therefore difficult to mount conveniently on the doors and door jambs where the system is to be installed.
  • the present invention provides an air lock which is operated by a pneumatic retraction system and has a manual override feature for operating the lock in the event of failure of the pneumatic system.
  • the lock comprises a bolt which extends from a pneumatically operated piston, wherein the bolt includes a rack jour­nalled in its surface which mates with a pinion con­nected to the output shaft of a key operated lock.
  • the pinion interacts with the rack to retract the bolt when the key-operated lock is opened.
  • the advantage of the system of the present invention is that the rack and pinion key-operated override may be installed in the same housing block with the other components of the air lock.
  • Another advantage of the present system is that it operates directly on the spring loaded bolt, pushing it against the spring bias instead of pulling it. There is less friction with this arrangement and fewer moving parts as opposed to a conventional cable and pulley manual override.
  • the use of a single housing for both the pneumatic bolt retrac­tion system and the manual override allows the entire structure to be more compact so that it may be ver­tically mounted on a door jamb.
  • a cooperatively mating door includes a bolt receiver which slides under the lock mechanism urging the bolt up against its bias spring. The bolt then locks into place when it encoun­ters an aperture in the bolt receiver. This is the most efficient way of positioning the bolt and bolt receiver on doors of the type found in correctional facilities.
  • a further object of the invention is to pro­vide a manual override for a pneumatic lock having a rack and pinion manual retraction mechanism operating directly upon the bolt of the pneumatic lock.
  • a still further object of this invention is to provide a pneumatic lock having a manual override system capable of being housed within a single housing block and adapted for vertical mounting on a door jamb.
  • a pneumatically-operated lock 10 is vertically mounted on a door jamb 12 which mates which a door 14.
  • the lock 10 includes a downwardly extending bolt 16 which cooperatively mates with a bolt receiver 18 mounted on the door 14.
  • the lock 10 includes a housing block 20 which receives the bolt 16 for recipro­cal sliding movement therein through a lower aperture 22.
  • the bolt 16 is connected to a pneumatic piston 24 which is spring loaded by biasing spring 26.
  • the bolt 16 and piston 24 are wholly contained within the housing block 20 by a cap 28 which supports a pneumatic valve 30.
  • the pneumatic valve 30 may be electrically remotely operated by wires 32.
  • the housing block 20 includes an aperture 34 for receiving a cylinder lock 36.
  • the cylinder may also be mounted on the other side of the block 20 as shown by the cylinder lock 37 in dashed outline.
  • the housing block 20 also includes a yoke 38 which supports a rotatable pinion 40.
  • the rotatable pinion 40 interacts with rack teeth 42 which are cut in a surface of the bolt 16.
  • the pinion 40 includes a pin 44 which is connected to the cylinder lock 36 as will be explained below.
  • the cylinder lock 36 includes an output shaft (not shown) which carries an output cam 46.
  • the output cam 46 makes con­tact with pin 44, rotating the pinion 40 within the yoke 38.
  • the pinion rotates in the direc­tion shown by the arrow in FIG. 3A, and mating with the rack teeth 42 in the bolt 16, urges the bolt upwardly against the bias action of bias spring 26.
  • the bolt 16 is retracted pneumatically by allowing air or another similar gas to flow through valve 30 into passageway 48 which is bored in housing block 10 and empties into air chamber 50 on the forward side of sealing ring 52. This pushes the pneumatic piston 24 upwards against the biasing action of spring 26 until the bolt 16 is fully retracted. Air escapes from chamber 50 during this process through passageway 54 bored in cap 28. Air is provided to the valve 30 by a pneumatic supply line 56. However, in the event of a power failure or a failure in the pneumatic pressure system supplying line 56, the bolt 16 may be retracted by simply turning key 51 in cylinder lock 36.

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  • Mechanical Control Devices (AREA)
  • Actuator (AREA)
EP87308681A 1986-10-02 1987-09-30 Pneumatische Verriegelung mit handbetätigter Notentriegelung Withdrawn EP0262959A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US91472386A 1986-10-02 1986-10-02
US914723 1986-10-02

Publications (2)

Publication Number Publication Date
EP0262959A2 true EP0262959A2 (de) 1988-04-06
EP0262959A3 EP0262959A3 (de) 1988-11-02

Family

ID=25434705

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87308681A Withdrawn EP0262959A3 (de) 1986-10-02 1987-09-30 Pneumatische Verriegelung mit handbetätigter Notentriegelung

Country Status (1)

Country Link
EP (1) EP0262959A3 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5040390A (en) * 1989-11-16 1991-08-20 General Motors Corporation Lock and control assembly for a vehicle tailgate
GB2325489A (en) * 1997-05-02 1998-11-25 Emhart Inc Electronically operated lock

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE371511C (de) * 1923-03-16 Bertha Reimers Geb Ziegler Sicherheitsschloss
US2179495A (en) * 1938-12-29 1939-11-14 Alva B Court Door and hatch closure
US3950018A (en) * 1972-10-20 1976-04-13 Pickering John J Bolt locks for freight car, trailer truck and air cargo doors

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5040390A (en) * 1989-11-16 1991-08-20 General Motors Corporation Lock and control assembly for a vehicle tailgate
GB2325489A (en) * 1997-05-02 1998-11-25 Emhart Inc Electronically operated lock
ES2151813A1 (es) * 1997-05-02 2001-01-01 Emhart Inc Cerradura accionada electronicamente.
GB2325489B (en) * 1997-05-02 2001-06-06 Emhart Inc Electronically operated lock

Also Published As

Publication number Publication date
EP0262959A3 (de) 1988-11-02

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