초록 ▼

In a dispensing pump including a reciprocable plunger having a locking finger on a pump body member and the cam on a control member rotatable relative thereto for immobilizing the plunger as an upper portion of the finger is deflected into the path of reciprocation of the plunger, another cam is pro

In a dispensing pump including a reciprocable plunger having a locking finger on a pump body member and the cam on a control member rotatable relative thereto for immobilizing the plunger as an upper portion of the finger is deflected into the path of reciprocation of the plunger, another cam is provided on the control member for positively deflecting such upper portion out of such path of reciprocation so as to avoid complete reliance on the locking finger retracting from such path in a normal unstressed condition thereof. Alternatively, a stop shoulder on the plunger on which the free end of the locking finger bears to effect plunger mobilization may be beveled and the free end accordingly sloped so as to positively retract the locking finger out of the path of the stop shoulder upon plunger reciprocation.

대표청구항 ▼

In a dispensing pump having a finger-operated plunger head mounted for reciprocation on a pump body member secured in a fluid tight manner on a container of flowable product to be dispensed, reciprocation of said head effecting the dispensing of the product, a downwardly facing stop shoulder on said

In a dispensing pump having a finger-operated plunger head mounted for reciprocation on a pump body member secured in a fluid tight manner on a container of flowable product to be dispensed, reciprocation of said head effecting the dispensing of the product, a downwardly facing stop shoulder on said head, a control member rotatably mounted on said body member and having an axial opening through which said stop shoulder extends during plunger reciprocation, at least one upstanding locking finger secured to one of said members and being deflectable transversely to the axis of reciprocation of said plunger into the path of reciprocation of said stop shoulder, the improvement wherein first and second cam means are provided on the other of said members for engaging said finger to positively deflect said finger transversely into as well as out of the path of said stop shoulder, respectively, in response to relative rotary movement of said members, said first and second cam means lying opposite each other and being in constant engagement with opposite sides of said finger during said relative rotary movement for supporting said finger against any buckling loads applied to said plunger when selectively immobilized upon deflection of said finger into said path of reciprocation, and for avoiding any interference between said head and said finger during during reciprocation of said head when said finger is deflected out of said path of reciprocation.