Abstract:
A gate has a frame, a gate door, a latch and a latch seat. The gate door is pivotally mounted in the frame. The latch is attached to a top corner of the gate door. The latch seat is attached to a top inner corner of the frame. The latch seat and the latch engage each other to latch the gate door to the frame. Unlatching the gate door requires multiple actions so children or pets are not able to open the gate. The safety of children is assured, and pets will not ruin objects isolated by the gate.

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to a gate, and more particularly to a gate that keeps children or pets out of restricted areas that may cause injury to children or allow pets to ruin objects in the area. 
   2. Description of Related Art 
   Virtually all children and young pets are very active and curious so parents and pet owners have to be vigilant and pay nearly constant attention to keep children from being injured or pets from ruining furniture or household objects. 
   With reference to  FIG. 12 , a conventional gate comprises a frame ( 70 ), a gate door ( 71 ) and a latch ( 72 ). The frame ( 70 ) is U-shaped and has four outer corners, two proximal inner corners, four holes ( 701 ) and four mounting bolts ( 73 ). The holes ( 701 ) are formed respectively at the outer corners. Each mounting bolt ( 73 ) has a threaded shaft, a proximal end, a distal end and a threaded collar ( 731 ). The proximal end of the bolt ( 73 ) extends into the hole ( 701 ) of the frame ( 70 ). The collar ( 731 ) is against the frame ( 70 ). The rear end of the bolt ( 73 ) is against a wall to install the frame ( 70 ). 
   The gate door ( 71 ) is mounted pivotally on the two proximal inner corners of the frame ( 70 ) and has a top distal corner. 
   The latch ( 72 ) is mounted on the top distal corner of the gate door ( 71 ) and latches the gate door ( 71 ) to the gate post ( 70 ). 
   The frame ( 70 ) can be mounted in any entryway, such as a kitchen doorway, a living room archway, the top or bottom of a staircase or the like. 
   However, the latch ( 72 ) cannot lock the gate door ( 71 ) closed in the frame ( 70 ), and children or pets can unlatch and open the gate door ( 71 ) without any trouble and get into the restricted area. 
   To overcome the shortcomings, the present invention provides a gate to obviate or mitigate the aforementioned problems. 
   SUMMARY OF THE INVENTION 
   The primary objective of the present invention is to provide a gate that keep children or pets from getting into specific areas. 
   The gate has a frame, a gate door, a latch and a latch seat. The gate door is mounted pivotally in the frame. The latch is mounted on a top corner of the gate door. The latch seat is mounted on a top inner corner of the frame. The latch engages the latch seat to latch the gate door in the frame. The gate door is not easy to unlatch so children or pets are not able to get into a restricted area. 
   Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective view of a gate in accordance with the present invention; 
       FIG. 2  is an exploded perspective view of the gate in  FIG. 1 ; 
       FIG. 3  is an enlarged exploded perspective view of the a latch in  FIG. 1 ; 
       FIG. 4  is a front view of the gate in  FIG. 1 ; 
       FIG. 5  is an operational front view of the gate in  FIG. 4 ; 
       FIG. 6  is a front internal view of the latch in  FIG. 3  in a latched position; 
       FIG. 7  is a front internal view of the latch in  FIG. 6 ; 
       FIG. 8  is an operational front internal view of the latch in  FIG. 3  unlatched; 
       FIG. 9  is an operational front internal view of the latch in  FIG. 3  locked in a latched position; 
       FIG. 10  is an enlarged operational cross sectional front view of a locking bolt in  FIG. 5  in a locked position; 
       FIG. 11  is an enlarged operational cross sectional front view of the locking bolt in  FIG. 5  retracted when the gate closes; and 
       FIG. 12  is a perspective view of a conventional gate in accordance with the prior art. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
   With reference to  FIGS. 1 ,  2  and  4 , a gate in accordance with the present invention comprises a frame ( 10 ), a hinge pin seat ( 20 ), a latch seat ( 30 ), a gate door ( 40 ), a latch ( 50 ) and four mounting bolts ( 60 ). 
   The frame ( 10 ) has four outer corners, an opening ( 11 ), a top inner proximal corner and a top inner distal corner. Each outer corner has a threaded hole ( 101 ). The opening ( 11 ) is formed in the frame ( 10 ) and has a bottom edge, a pivot hole ( 13 ) and a locking plate ( 12 ). The pivot hole ( 13 ) is formed in the bottom edge of the opening ( 11 ). The locking plate ( 12 ) is mounted on the bottom edge of the opening ( 11 ) and has a locking bolt hole ( 121 ) formed in the locking plate ( 12 ). 
   The hinge pin seat ( 20 ) is attached to the top inner proximal corner of the frame ( 10 ) and has a barrel ( 21 ). The barrel ( 21 ) is formed in the hinge pin seat ( 20 ) and has an inclined inner end. 
   With further reference to  FIG. 6 , the latch seat ( 30 ) is attached to the top inner distal corner of the frame ( 10 ) and has two side surfaces, a latch pin recess ( 31 ), a latch bolt recess ( 32 ) and two inclined notches ( 33 ). The latch pin recess ( 31 ) and latch bolt recess ( 32 ) are formed horizontally in the latch seat ( 30 ). The inclined notches ( 33 ) are formed respectively on side surfaces of the latch seat ( 30 ) and communicate with the latch pin recess ( 31 ). 
   The gate door ( 40 ) has a top proximal corner, a top distal corner, a bottom, a bottom pivot pin ( 41 ), a top pivot pin ( 42 ), a locking bolt seat, a spring ( 431 ) and a locking bolt ( 43 ). The bottom pivot pin ( 41 ) protrudes down from the bottom of the gate door ( 40 ) and is mounted pivotally and slidably in the pivot hole ( 13 ) in the frame ( 10 ). The top pivot pin ( 42 ) is attached to the top proximal corner of the gate door ( 40 ), has an inclined bottom surface and is rotatably mounted in the barrel ( 21 ) in the hinge pin seat ( 20 ). The locking bolt seat is mounted on the bottom of the gate door ( 40 ). The locking bolt ( 43 ) and the spring ( 431 ) are mounted in the locking bolt seat. With reference to  FIG. 10 , the locking bolt ( 43 ) is held in the locking bolt hole ( 121 ) of the frame ( 10 ). 
   With reference to  FIG. 3 , the latch ( 50 ) is attached to the top distal corner of the gate door ( 40 ) and has a front casing ( 51 ), a rear casing ( 52 ), a latch block ( 55 ), a latch pin ( 53 ), a knob ( 56 ) and a release button ( 54 ). 
   The front casing ( 51 ) has a top, a front surface, a front end, a button recess ( 511 ), a latch pin cutout ( 512 ), a latch bolt cutout ( 513 ) and a through hole ( 514 ). The button recess ( 511 ) is formed in the top of the front casing ( 51 ). The latch pin cutout ( 512 ) and the latch bolt cutout ( 513 ) are formed in the front end of the front casing ( 51 ). The through hole ( 514 ) is formed through the front surface of the front casing ( 51 ). 
   The rear casing ( 52 ) is attached to the front casing ( 51 ) and has a top, a rear surface, a front end, a button recess ( 521 ), a latch pin recess ( 522 ), a latch block recess ( 525 ), a latch pin cutout ( 523 ) and a latch bolt cutout ( 524 ). The button recess ( 521 ) is formed in the top of the rear casing ( 52 ) and mates with the button recess ( 511 ) in the front casing ( 51 ) to form a button hole. The latch pin recess ( 522 ) and the latch block recess ( 525 ) are formed horizontally inside the rear casing ( 52 ). The latch pin cutout ( 523 ) and the latch bolt cutout ( 524 ) are formed in the front end of the rear casing ( 52 ). The latch pin cutout ( 523 ) communicates with the latch pin recess ( 522 ) and mates with the latch pin cutout ( 512 ) in the front casing ( 51 ) to form a latch pin hole. The latch bolt cutout ( 524 ) communicates with the latch block recess ( 525 ) and mates with the latch bolt cutout ( 513 ) in the front casing ( 51 ) to form a latch bolt hole. 
   The latch block ( 55 ) is mounted slidably in the latch block recess ( 525 ) in the rear casing ( 52 ) and has a distal end, a side, a latch bolt ( 551 ), an eccentric hole ( 552 ) and a spring ( 57 ). The latch bolt ( 551 ) is formed on and protrudes from the distal end of the latch block ( 55 ), extends through the latch bolt hole in the latch ( 50 ) and engages the latch bolt recess ( 32 ) in the latch seat ( 30 ). The eccentric hole ( 552 ) is formed through the side of the latch block ( 55 ). 
   The spring ( 57 ) is mounted between the latch block ( 55 ) and the rear casing ( 52 ) and has a front end and a rear end. The front end of the spring ( 57 ) presses against the side of the rear casing ( 52 ). The rear end of the spring ( 57 ) presses against the latch block ( 55 ) to disengage the latch bolt ( 551 ) from the latch bolt recess ( 32 ). 
   The latch pin ( 53 ) is mounted in the latch pin recess ( 522 ) in the rear casing ( 53 ) and has a front end, a rear end and a spring ( 531 ). The front end of the latch pin ( 53 ) protrudes through the latch pin hole in the latch ( 50 ) and engages the latch pin recess ( 31 ) in the latch seat ( 30 ). The spring ( 531 ) is mounted around the rear end of the latch pin ( 53 ) and presses against the rear end of the latch pin ( 53 ) and the latch pin recess ( 522 ) to make the front end protrude through the latch pin hole. 
   The knob ( 56 ) has an inside surface and an eccentric shaft ( 561 ). With further reference to  FIG. 7 , the eccentric shaft ( 561 ) is formed on and protrudes from the inside surface of the knob ( 56 ), extends through the through hole ( 514 ) in the front casing ( 51 ), engages the eccentric hole ( 552 ) in the latch block ( 55 ) and has an eccentric edge ( 5611 ). With further reference to  FIG. 9 , rotating the knob ( 56 ) counterclockwise causes the eccentric edge ( 5611 ) of the eccentric shaft ( 561 ) to press against the eccentric hole ( 552 ) in the latch block ( 55 ) and push the latch bolt ( 551 ) through the latch bolt cutout ( 524 ). Continuing to rotate the knob ( 56 ) causes the eccentric edge ( 5611 ) to lock in place and hold the latch bolt ( 551 ) in the latch bolt recess ( 32 ) in the latch seat ( 30 ). Rotating the knob ( 56 ) clockwise releases the eccentric edge ( 5611 ) from the eccentric hole ( 552 ), and the spring ( 57 ) retracts the latch bolt ( 551 ) from the latch bolt recess ( 32 ) in the latch seat ( 30 ). 
   The release button ( 54 ) is mounted in the button hole in the latch ( 50 ) and has a bottom, two actuating legs ( 542 ) and multiple springs ( 541 ). The actuating legs ( 542 ) are formed on and protrude down from the bottom of the release button ( 54 ) in parallel on opposite sides of the latch pin ( 53 ) and have respectively an inclined edge. With further reference to  FIG. 8 , the inclined edge retracts the latch pin ( 53 ) from the latch pin recess ( 31 ) in the latch seat ( 30 ) when the release button ( 54 ) is pressed down. The springs ( 541 ) press against the bottom of the release button ( 54 ) and press the release button ( 54 ) up in the button hole in the latch ( 50 ) when the release button ( 54 ) is released. 
   The mounting bolts ( 60 ) are mounted respectively in the threaded holes ( 101 ) in the outer corners of the frame ( 10 ), and each mounting bolt ( 60 ) has a distal end, a locking nut ( 61 ), a threaded shaft and a head. The locking nut ( 61 ) has a threaded central hole. The threaded shaft screws through the locking nut ( 61 ) and into the threaded hole ( 101 ) in a corresponding outer corner of the frame ( 10 ). The head is formed on the distal end of the mounting bolt ( 60 ). The mounting bolts ( 60 ) are screwed out of the threaded holes ( 101 ) until the heads press against structural members such as walls, banister posts, doorframes or the like to hold the gate in place. The locking nuts ( 61 ) are tightened respectively against the outer corners to keep the mounting bolts ( 60 ) from loosening. 
   Three distinct actions are required to open the gate, and two of the actions must be performed simultaneously. The three essential actions consist of turning the knob ( 56 ), pressing the release button ( 54 ) and lifting the gate door ( 40 ). As previously described, turning the knob ( 56 ) and pressing the release button ( 54 ) retract the latch bolt ( 551 ) and the latch pin ( 53 ) respectively from the latch bolt recess ( 32 ) and latch pin recess ( 31 ) in the latch seat ( 30 ). With further reference to  FIGS. 5 and 11 , the gate door ( 40 ) must also be lifted up to release the locking bolt ( 43 ) at the bottom of the gate door ( 40 ) from the locking bolt hole ( 121 ) in the frame ( 10 ) when the release button ( 54 ) is pressed down. The coordinated actions required to open the gate door ( 40 ) are relatively easy for an adult, are difficult for a child and are virtually impossible for a pet. 
   Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description together with details of the structure and function of the invention, the disclosure is illustrative only. Changes may be made in detail especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.