Squeeze-type pump

Abstract

A squeeze-type pump includes a base, a nozzle, a sac, a check valve and two coves. The base, the nozzle and the sac are made in one piece. The check valve is located between the sac to allow air to go to the nozzle from the sac, but not vice versa. The covers are connected to the base.

1 . A squeeze-type pump comprising:
 a base ( 11 ) comprising a bottom ( 112 ), a first opening ( 113 ) in the bottom ( 112 ), a second opening ( 114 ) in the bottom ( 112 ), a first cavity ( 13 ) in the bottom ( 112 ), a second cavity ( 14 ) in the bottom ( 112 ), and a third cavity ( 15 ) in the bottom ( 112 );   a nozzle ( 17 ) formed on the base ( 11 ) and formed with space ( 171 ) in communication with the second cavity ( 14 ) through the second opening ( 114 );   a sac ( 16 ) formed on the base ( 11 ) and formed with a space ( 161 ) in communication with the first cavity ( 13 ) through the first opening ( 113 );   a check valve ( 20 ) inserted in the second cavity ( 14 ) and formed with a channel ( 23 ) that comprises an entrance ( 21 ) in communication with the first cavity ( 13 ) and an exit ( 22 ) in communication with the space ( 171 ) of the nozzle ( 17 );   a first cover ( 40 ) comprising:
 a first face ( 411 ) in contact with the bottom ( 112 ); 
 a first auxiliary cavity ( 43 ) made in the first face ( 411 ) combined with the first cavity ( 13 ) and connected to the space ( 161 ) of the sac ( 16 ); 
 a second auxiliary cavity ( 44 ) made in the first face ( 411 ) of the first cover ( 40 ) and aligned with the second auxiliary cavity ( 14 ) and the nozzle ( 17 ); 
 a sleeve ( 46 ) formed on the second face ( 412 ) of the first cover ( 40 ); 
 an aperture via which the sleeve ( 46 ) is in communication with the second auxiliary cavity ( 44 ); 
 a tube ( 47 ) comprising an end inserted in the sleeve ( 46 ) and another end for insertion in an inflatable object; and 
 a one-way entrance filter ( 42 ) for only admitting air into the space ( 161 ) of the sac ( 16 ); 
   a second cover ( 50 ) in contact with the first cover and comprising a first window ( 54 ) aligned with the one-way entrance filter ( 42 ) and a second window ( 55 ) aligned with the sleeve ( 46 );   wherein the inflation unit ( 10 ) and the first cover ( 40 ) are made of an elastic material, wherein the second cover ( 50 ) is made of a thermoplastic material.   
     
     
         2 . The squeeze-type pump according to  claim 1 , wherein the base ( 11 ) comprises a skirt ( 111 ) extending from and around the bottom ( 112 ). 
     
     
         3 . The squeeze-type pump according to  claim 1 , wherein the bottom further comprises a third cavity ( 15 ) in a bed of the second cavity ( 14 ), wherein the third cavity ( 15 ) is combined with the second auxiliary cavity ( 44 ) to allow expansion of the check valve ( 20 ). 
     
     
         4 . The squeeze-type pump according to  claim 1 , wherein the entrance ( 21 ) is wider than the exit ( 22 ). 
     
     
         5 . The squeeze-type pump according to  claim 4 , wherein the channel ( 23 ) is a stepped channel. 
     
     
         6 . The squeeze-type pump according to  claim 1 , wherein the second cavity ( 14 ) comprises a boundary ( 141 ) for contact with an edge of the check valve ( 20 ) so that the second cavity ( 14 ) keeps the check valve ( 20 ) in position. 
     
     
         7 . The squeeze-type pump according to  claim 1 , wherein the first cover ( 40 ) further comprises two blocks ( 48 ) formed on the second face ( 412 ) and a gap ( 49 ) between the blocks ( 48 ), wherein the second cover ( 50 ) further comprises a recess ( 52 ) for containing the blocks ( 48 ) and a rib ( 53 ) inserted in the gap ( 49 ). 
     
     
         8 . The squeeze-type pump according to  claim 1 , further comprising a contact element ( 162 ) located on an upper end of the sac ( 16 ), wherein the contact element ( 162 ) is made of a thermoplastic material. 
     
     
         9 . The squeeze-type pump according to  claim 8 , wherein a ratio of a largest diameter of the contact element ( 162 ) over a largest diameter of the sac ( 16 ) is 1:3 to 2:3.