US3222806A - Self-closing gate - Google Patents

Self-closing gate Download PDF

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US3222806A
US3222806A US445828A US44582865A US3222806A US 3222806 A US3222806 A US 3222806A US 445828 A US445828 A US 445828A US 44582865 A US44582865 A US 44582865A US 3222806 A US3222806 A US 3222806A
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Prior art keywords
gate
hinge member
closed position
cam
support
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Expired - Lifetime
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US445828A
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Wayne D Martin
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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B11/00—Means for allowing passage through fences, barriers or the like, e.g. stiles
    • E06B11/02—Gates; Doors
    • E06B11/04—Gates; Doors characterised by the kind of suspension
    • 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
    • E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
    • E05F1/02—Closers or openers for wings, not otherwise provided for in this subclass gravity-actuated, e.g. by use of counterweights
    • E05F1/04—Closers or openers for wings, not otherwise provided for in this subclass gravity-actuated, e.g. by use of counterweights for wings which lift during movement, operated by their own weight
    • E05F1/06—Mechanisms in the shape of hinges or pivots, operated by the weight of the wing
    • E05F1/061—Mechanisms in the shape of hinges or pivots, operated by the weight of the wing with cams or helical tracks
    • E05F1/065—Cam-and-wheel arrangements
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2201/00—Constructional elements; Accessories therefore
    • E05Y2201/60—Suspension or transmission members; Accessories therefore
    • E05Y2201/604—Transmission members
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2201/00—Constructional elements; Accessories therefore
    • E05Y2201/60—Suspension or transmission members; Accessories therefore
    • E05Y2201/622—Suspension or transmission members elements
    • E05Y2201/638—Cams; Ramps
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2201/00—Constructional elements; Accessories therefore
    • E05Y2201/60—Suspension or transmission members; Accessories therefore
    • E05Y2201/622—Suspension or transmission members elements
    • E05Y2201/688—Rollers
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/40—Application of doors, windows, wings or fittings thereof for gates

Definitions

  • This invention pertains to self-closing gates and is particularly directed to apparatus for automatically returning and retaining a gate in closed position.
  • One of the objects of this invention is to provide a gate closing apparatus that is simple in construction and highly durable and long lasting in operation.
  • Another object is to provide a centering and closing device for a gate, door or the like which is smooth and quiet in operation and highly dependable in service.
  • a further object is to provide a gate closing mechanism having a smooth clamping action to prevent excessive and improper swinging of a gate to avoid injury and harm, especially to small children who may use the gate.
  • FIG. 1 is a fragmentary side elevation of a self-closing gate structure incorporating the features of this invention.
  • FIG. 2 is an enlarged sectional view on the line 2-2 of FIG. 1.
  • FIG. 3 is a fragmentary enlarged sectional view on the line 33 of FIG. 1.
  • a gate comprising the top rail 11, bottom rail 12 and the hinge member 13.
  • the hinge member 13 is pivotally and axially slidably supported in the lower support bearing 14 having an integral mounting flange 15 suitably fixed to a wall or post support 16 by suitable bolts 17.
  • the upper end of the hinge member 13 is pivotally and axially slidable in the upper support bearing 18, FIG. 2, which is integrally connected to a plurality of outwardly radially extending brackets 19 to the outer ends of which is fixed the cam ring 20 in turn rigidly fixed at 21 to a mounting plate 22 secured to the wall 16 by suitable bolts 23.
  • Fixed to and extending radially outwardly from the hinge member 13 above the upper support bearing 18 is the cam roller arm 24 on the outer end of which is journaled the cam roller 25 which is adapted to roll on the top edge cam surface 26 of the cam ring 20 to limit the downward axial position of the hinge member 13 and the gate 10.
  • the cam surface 26 has a depressed centering portion 27 to receive and position the cam roller 25 for closed position of the gate 10, and upwardly sloping cam surface 28 and 29 for lifting the gate when swung open as the roller is raised to either position 25a or 25b, FIG. 3.
  • the tendency under infiuence of gravity acting on the gate is for the roller to roll down to the depressed centering portion 27 to normally close the gate.
  • a control spring 30 having its lower end fixed at 31 to the top end of the hinge member 13 and having its top end fixed at 32 to an angle bracket 33 fixed to the wall 16 by suitable bolts 34.
  • the spring 30 is mounted between the top of the hinge member 13 and the bracket 33 so that the spring is at all times compressed axially for any swung position of the gate but 3,222,806 Patented Dec. 14, 1965 with increased axial downward pressure as the gate is swung to either open position so as to cause the cam roller to be forced down the sloping cam surfaces to aid in swinging the gate to closed position.
  • the spring 30 when the gate is in closed position with the cam roller 25 in the depressed centering portion 27 of the cam ring 20, the spring 30 is in neutral position so far as any twisting torque is concerned. However, whenever the gate 10 is swung to either open position the spring 30 is wound up in one direction or the other so that the torque thus developed in the spring assists the axial pressure of the spring and the sloping cam surfaces 28 and 29 in closing the gate. It is important to note that the twisting torque is substantially nil as the gate is first swung immediately each side of the normally closed position which makes for easy starting in initially swinging the gate from closed position to start the cam roller 25 up a slope 28 or 29.
  • a self closing gate comprising in combination:
  • a cam roller j ournaled on said hinge member adapted to be received in said depressed centering portion and roll on said upwardly sloping surfaces so as to raise said hinge member and gate when said gate is swung to either side of closed position and to cause said gate to normally return by gravity to closed position when released,
  • G. and further means to return said gate to closed position comprising a combined torsion and compression spring having one end fixed to said support and its other end fixed to said hinge member in neutral torisonal condition when said cam roller is in said depressed centering portion for yieldingly normally torsionally swinging said gate to closed position while axially yield-ingly forcing said cam roller against said cam surface on said cam ring and in said depressed centering portion to hold said gate in closed position.
  • a self closing gate comprising in combination:
  • a cam roller journaled on said hinge member adapted to be received in said depressed centering portion and roll on said upwardly sloping surfaces so as to raise said hinge member and gate when said gate is swung either side of closed position and to cause said gate to normally return by gravity to closed position when released,
  • G. and further means to return said gate to closed position comprising a combined torsion and compression spring having one end fixed to said support and the other end fixed tosaid hinge member in neutral torsional condition when said earn roller is in said depressed centering portion to normally torsionally swing to and hold said gate in closed position.

Description

Dec. 14, 1965 w. D. MARTIN 3, 3
SELF-CLOS ING GATE Original Filed Oct. 24, 1963 INVENTOR. Mum/5 5. Mew/v United States Patent "Ice Oct. 24, 1963. This application Mar. 15, 1965, Ser. No. 445,828
2 Claims. (Cl. 39-84) This invention pertains to self-closing gates and is particularly directed to apparatus for automatically returning and retaining a gate in closed position.
This is a substitute for an abandoned application Serial No. 318,648 filed Oct. 24, 1963.
One of the objects of this invention is to provide a gate closing apparatus that is simple in construction and highly durable and long lasting in operation.
Another object is to provide a centering and closing device for a gate, door or the like which is smooth and quiet in operation and highly dependable in service.
A further object is to provide a gate closing mechanism having a smooth clamping action to prevent excessive and improper swinging of a gate to avoid injury and harm, especially to small children who may use the gate.
Further features and advantages of this invention will appear from a detailed description of the drawings in which:
FIG. 1 is a fragmentary side elevation of a self-closing gate structure incorporating the features of this invention.
FIG. 2 is an enlarged sectional view on the line 2-2 of FIG. 1.
FIG. 3 is a fragmentary enlarged sectional view on the line 33 of FIG. 1.
As an example of one embodiment of this invention there is shown a gate comprising the top rail 11, bottom rail 12 and the hinge member 13. The hinge member 13 is pivotally and axially slidably supported in the lower support bearing 14 having an integral mounting flange 15 suitably fixed to a wall or post support 16 by suitable bolts 17.
The upper end of the hinge member 13 is pivotally and axially slidable in the upper support bearing 18, FIG. 2, which is integrally connected to a plurality of outwardly radially extending brackets 19 to the outer ends of which is fixed the cam ring 20 in turn rigidly fixed at 21 to a mounting plate 22 secured to the wall 16 by suitable bolts 23. Fixed to and extending radially outwardly from the hinge member 13 above the upper support bearing 18 is the cam roller arm 24 on the outer end of which is journaled the cam roller 25 which is adapted to roll on the top edge cam surface 26 of the cam ring 20 to limit the downward axial position of the hinge member 13 and the gate 10. The cam surface 26 has a depressed centering portion 27 to receive and position the cam roller 25 for closed position of the gate 10, and upwardly sloping cam surface 28 and 29 for lifting the gate when swung open as the roller is raised to either position 25a or 25b, FIG. 3. The tendency under infiuence of gravity acting on the gate is for the roller to roll down to the depressed centering portion 27 to normally close the gate.
To increase the smooth operation of the gate and assure its prompt return to normally closed position there is provided a control spring 30 having its lower end fixed at 31 to the top end of the hinge member 13 and having its top end fixed at 32 to an angle bracket 33 fixed to the wall 16 by suitable bolts 34. The spring 30 is mounted between the top of the hinge member 13 and the bracket 33 so that the spring is at all times compressed axially for any swung position of the gate but 3,222,806 Patented Dec. 14, 1965 with increased axial downward pressure as the gate is swung to either open position so as to cause the cam roller to be forced down the sloping cam surfaces to aid in swinging the gate to closed position. Further, when the gate is in closed position with the cam roller 25 in the depressed centering portion 27 of the cam ring 20, the spring 30 is in neutral position so far as any twisting torque is concerned. However, whenever the gate 10 is swung to either open position the spring 30 is wound up in one direction or the other so that the torque thus developed in the spring assists the axial pressure of the spring and the sloping cam surfaces 28 and 29 in closing the gate. It is important to note that the twisting torque is substantially nil as the gate is first swung immediately each side of the normally closed position which makes for easy starting in initially swinging the gate from closed position to start the cam roller 25 up a slope 28 or 29.
While the apparatus herein disclosed and described constitutes a preferred form of the invention, it is also to be understood that the apparatus is capable of mechanical alteration without departing from the spirit of the invention and that such mechanical arrangement and commercial adaptions as fall within the scope :of the appendant claims are intended to be included herein. Having thus fully set forth and described this invention what is claim and desired to be obtained by United States Letters Patent is:
1. A self closing gate comprising in combination:
A. a support,
B. a hinge member pivotally and vertically axially slidable on said support,
C. a cam ring fixed on said support surrounding said hinge member having,
D. a depressed centering portion upwardly facing cam roller receiving surface,
E. upwardly sloping cam surfaces extending along each side of said depressed centering surface,
F. a cam roller j ournaled on said hinge member adapted to be received in said depressed centering portion and roll on said upwardly sloping surfaces so as to raise said hinge member and gate when said gate is swung to either side of closed position and to cause said gate to normally return by gravity to closed position when released,
G. and further means to return said gate to closed position comprising a combined torsion and compression spring having one end fixed to said support and its other end fixed to said hinge member in neutral torisonal condition when said cam roller is in said depressed centering portion for yieldingly normally torsionally swinging said gate to closed position while axially yield-ingly forcing said cam roller against said cam surface on said cam ring and in said depressed centering portion to hold said gate in closed position.
2. A self closing gate comprising in combination:
A. a support,
B. a hinge member pivotally and vertically axially slidable on said support,
C. a cam ring fixed on said support surrounding said hinge member having,
D. a depressed centering portion upwardly facing cam roller receiving surface,
E. upwardly sloping cam surfaces extending along each side of said depressed centering surface,
F. a cam roller journaled on said hinge member adapted to be received in said depressed centering portion and roll on said upwardly sloping surfaces so as to raise said hinge member and gate when said gate is swung either side of closed position and to cause said gate to normally return by gravity to closed position when released,
G. and further means to return said gate to closed position comprising a combined torsion and compression spring having one end fixed to said support and the other end fixed tosaid hinge member in neutral torsional condition when said earn roller is in said depressed centering portion to normally torsionally swing to and hold said gate in closed position.
References Cited by the Examiner UNITED STATES PATENTS 5/1926 Malnrberg 16-154 1/1928 Blackwell 16-154 X 4/1935 Ferris 16-154 X 7/1937 Barr 39-84 7/1952 Anderson et a1. 16-154 2/1953 Enghauser 16-154 X 11/1960 Slopa et al. 16-154 FOREIGN PATENTS 6/ 1934 Australia. 4/ 1956 France.
HARRISON R. MOSELEY, Primary Examiner.
D. L. TAYLOR, Assistant Examiner.

Claims (1)

1. A SELF CLOSING GATE COMPRISING IN COMBINATION: A. A SUPPORT, B. A HINGE MEMBER PIVOTALLY AND VERTICALLY AXIALLY SLIDABLE ON SAID SUPPORT, C. A CAM RING FIXED ON SAID SUPPORT SURROUNDING SAID HINGE MEMBER HAVING, D. A DEPRESSED CENTERING PORTION UPWARDLY FACING CAM ROLLER RECEIVING SURFACE, E. UPWARDLY SLOPING CAM SURFACES EXTENDING ALONG EACH SIDE OF SAID DEPRESSED CENTERING SURFACE, F. A CAM ROLLER JOURNALED ON SAID HINGE MEMBER ADAPTED TO BE RECEIVED IN SAID DEPRESSED CENTERING PORTION AND ROLL ON SAID UPWARDLY SLOPING SURFACES SO AS TO RAISE SAID HINGE MEMBER AND GATE WHEN SAID GATE IS SWUNG TO EITHER SIDE OF SAID CLOSED POSITION AND TO CAUSE SAID GATE TO NORMALLY RETURN BY GRAVITY TO CLOSED POSITION WHEN RELEASED, G. AND FURTHER MEANS TO RETURN SAID GATE TO CLOSED POSITION COMPRISING A COMBINED TORSION AND COMPRESSION SPRING HAVING ONE END FIXED TO SAID SUPPORT AND ITS OTHER END FIXED TO SAID HINGE MEMBER IN NEUTRAL TORISONAL CONDITION WHEN SAID CAM ROLLER IS IN SAID DEPRESSED CENTERING PORTION FOR YIELDINGLY NORMALLY TORSIONALLY SWINGING SAID GATE TO CLOSED POSITION WHILE AXIALLY YIELDINGLY FORCING SAID CAM ROLLER AGAINST SAID CAM SURFACE ON SAID CAM RING AND IN SAID DEPRESSED CENTERING PORTION TO HOLD SAID GATE IN CLOSED POSITION.
US445828A 1965-03-15 1965-03-15 Self-closing gate Expired - Lifetime US3222806A (en)

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3435557A (en) * 1967-12-18 1969-04-01 Glenn J Johnson Self-closing gate
US4364200A (en) * 1980-12-29 1982-12-21 Kettering Medical Center Automatically operable automotive vehicle gate apparatus provided with self protection and automotive protection
US4406034A (en) * 1981-07-21 1983-09-27 Superior Door Corporation Self-closing door hinge
US4559904A (en) * 1982-05-18 1985-12-24 N.V. Nederlandsche Apparatenfabriek Nedap Feeding box
US4592529A (en) * 1982-11-04 1986-06-03 Kabushiki Kaisha Tokai Rika Denki Seisakusho Shock absorbing mechanism for rearview mirror assembly of motor vehicle
EP0257975A2 (en) * 1986-08-20 1988-03-02 The Kiddi Group Plc Child-proof safety gate
US5138796A (en) * 1990-10-29 1992-08-18 Grainger Dennis M Self-closing gate
US5180121A (en) * 1991-05-06 1993-01-19 The Boeing Company Aircraft door hinge mechanism with selectively triggerable actuator
WO1995034736A1 (en) * 1994-06-13 1995-12-21 Bruce Malcom Bisdee Apparatus for opening and closing a gate
DE19948579A1 (en) * 1999-10-08 2001-05-17 Siegel Geb Gmbh Co Kg Self-closing swing door has column partly enclosed by rotary swivel pipe, and has restoring elements with connecting link and slide block
US6652030B2 (en) 2000-09-01 2003-11-25 Irwin Seating Company Chair seat
DE20308976U1 (en) * 2003-06-10 2004-01-08 Gumpert, Annemarie Protective grille with a handle-shaped latch
US20080100052A1 (en) * 2006-10-27 2008-05-01 Fontaine Spray Suppression Company Ramping Mudflap Assembly
EP1712124A3 (en) * 2005-04-13 2008-07-09 Lely Enterprises AG A device for managing animal traffic
US20080237561A1 (en) * 2006-10-25 2008-10-02 440 Fence Company, Inc. Hingeless fence
US20110163056A1 (en) * 2006-02-23 2011-07-07 Rev-A-Shelf Company, LLC: Rotary shelf system
US20130269254A1 (en) * 2010-10-15 2013-10-17 I.M.A. Industria Macchine Automatiche S.P.A. Safety device for glove ports
JP2016069841A (en) * 2014-09-29 2016-05-09 朝日スチール工業株式会社 Fence door
US9630823B1 (en) * 2016-03-14 2017-04-25 Mezzanine Safeti-Gate, Inc. Safety gate for loading dock lift

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1583084A (en) * 1919-04-14 1926-05-04 R F Carpenter Mfg Company Hinge construction
US1628651A (en) * 1926-01-26 1927-05-17 John R Burress Yinldable barrier for automatic railway-crossing gates
US1655043A (en) * 1923-05-07 1928-01-03 Daniel W Blackwell Double-acting door hinge
US1996196A (en) * 1931-11-02 1935-04-02 Starline Cow stall
US2086061A (en) * 1937-01-21 1937-07-06 Willie L Barr Gate
US2604653A (en) * 1951-06-19 1952-07-29 Sanymetal Products Co Inc Hinge assembly for swinging doors
US2628441A (en) * 1951-03-12 1953-02-17 Winford I Enghauser Cam operated self-closing gate
FR1117545A (en) * 1954-12-16 1956-05-23 Mack S Motors Tamworth Pty Ltd Automatic barrier
US2958090A (en) * 1958-03-07 1960-11-01 Slopa Robert Earl Self-closing door hinge

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1583084A (en) * 1919-04-14 1926-05-04 R F Carpenter Mfg Company Hinge construction
US1655043A (en) * 1923-05-07 1928-01-03 Daniel W Blackwell Double-acting door hinge
US1628651A (en) * 1926-01-26 1927-05-17 John R Burress Yinldable barrier for automatic railway-crossing gates
US1996196A (en) * 1931-11-02 1935-04-02 Starline Cow stall
US2086061A (en) * 1937-01-21 1937-07-06 Willie L Barr Gate
US2628441A (en) * 1951-03-12 1953-02-17 Winford I Enghauser Cam operated self-closing gate
US2604653A (en) * 1951-06-19 1952-07-29 Sanymetal Products Co Inc Hinge assembly for swinging doors
FR1117545A (en) * 1954-12-16 1956-05-23 Mack S Motors Tamworth Pty Ltd Automatic barrier
US2958090A (en) * 1958-03-07 1960-11-01 Slopa Robert Earl Self-closing door hinge

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3435557A (en) * 1967-12-18 1969-04-01 Glenn J Johnson Self-closing gate
US4364200A (en) * 1980-12-29 1982-12-21 Kettering Medical Center Automatically operable automotive vehicle gate apparatus provided with self protection and automotive protection
US4406034A (en) * 1981-07-21 1983-09-27 Superior Door Corporation Self-closing door hinge
US4559904A (en) * 1982-05-18 1985-12-24 N.V. Nederlandsche Apparatenfabriek Nedap Feeding box
AU568074B2 (en) * 1982-05-18 1987-12-17 N.V. Nederlandsche Apparatenfabriek Nedap Feeding box
US4592529A (en) * 1982-11-04 1986-06-03 Kabushiki Kaisha Tokai Rika Denki Seisakusho Shock absorbing mechanism for rearview mirror assembly of motor vehicle
EP0257975A2 (en) * 1986-08-20 1988-03-02 The Kiddi Group Plc Child-proof safety gate
EP0257975A3 (en) * 1986-08-20 1988-09-21 The Kiddi Group Plc Child-proof safety gate
US5138796A (en) * 1990-10-29 1992-08-18 Grainger Dennis M Self-closing gate
US5180121A (en) * 1991-05-06 1993-01-19 The Boeing Company Aircraft door hinge mechanism with selectively triggerable actuator
WO1995034736A1 (en) * 1994-06-13 1995-12-21 Bruce Malcom Bisdee Apparatus for opening and closing a gate
DE19948579A1 (en) * 1999-10-08 2001-05-17 Siegel Geb Gmbh Co Kg Self-closing swing door has column partly enclosed by rotary swivel pipe, and has restoring elements with connecting link and slide block
DE19948579C2 (en) * 1999-10-08 2002-09-19 Siegel Geb Gmbh Co Kg Swing door for through systems
US6652030B2 (en) 2000-09-01 2003-11-25 Irwin Seating Company Chair seat
DE20308976U1 (en) * 2003-06-10 2004-01-08 Gumpert, Annemarie Protective grille with a handle-shaped latch
DE102004027855B4 (en) * 2003-06-10 2006-12-14 Heinrich Geuther Kindermöbel und -geräte GmbH & Co. KG Protective grille with a handle trap
DE102004027855C5 (en) * 2003-06-10 2010-10-28 Heinrich Geuther Kindermöbel und -geräte GmbH & Co. KG Protective grille with a handle trap
EP1712124A3 (en) * 2005-04-13 2008-07-09 Lely Enterprises AG A device for managing animal traffic
US20110163056A1 (en) * 2006-02-23 2011-07-07 Rev-A-Shelf Company, LLC: Rotary shelf system
US8528873B2 (en) * 2006-02-23 2013-09-10 Rev-A-Shelf Company, Llc Rotary shelf system
US20080237561A1 (en) * 2006-10-25 2008-10-02 440 Fence Company, Inc. Hingeless fence
US20080100052A1 (en) * 2006-10-27 2008-05-01 Fontaine Spray Suppression Company Ramping Mudflap Assembly
US20130269254A1 (en) * 2010-10-15 2013-10-17 I.M.A. Industria Macchine Automatiche S.P.A. Safety device for glove ports
US8944988B2 (en) * 2010-10-15 2015-02-03 I.M.A. Industria Macchine Automatiche S.P.A. Glove port safety mechanism
US20150082700A1 (en) * 2010-10-15 2015-03-26 I.M.A. Industria Macchine Automatiche S.P.A. Glove port safety mechanism
US9452539B2 (en) * 2010-10-15 2016-09-27 I.M.A. Industria Macchine Automatiche S.P.A. Glove port safety mechanism
JP2016069841A (en) * 2014-09-29 2016-05-09 朝日スチール工業株式会社 Fence door
US9630823B1 (en) * 2016-03-14 2017-04-25 Mezzanine Safeti-Gate, Inc. Safety gate for loading dock lift
US10011470B2 (en) 2016-03-14 2018-07-03 Mezzanine Safeti-Gates, Inc. Safety gate for loading dock lift

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