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US 9,803,631 B2Granted
Box lubrication pump
AssigneeGraco Minnesota Inc.
InventorAnthony J. Shakal
Life of this patent
Estimating the term…
Abstract
A box lubricator that includes a pump with a piston housing and piston. The piston housing extends from a first end to a second end, and includes a bore extending through the piston housing from the first end of the piston housing to the second end of the piston housing. The piston housing also includes a recess disposed at the second end of the piston housing, the recess being concentric with the bore and comprising a diameter larger than a diameter of the bore. The piston is disposed inside the bore of the piston housing. At least one elastomeric seal is disposed inside the recess of the piston housing and around the piston. In some embodiments, a ball and socket joint connects the piston to the rocker arm assembly. In some embodiments, a fluid passage and a check valve are disposed inside the piston.
Claims4
A pump comprising:
- a support post comprising a post first end opposite a post second end;
- a piston housing extending from a housing first end to a housing second end, the piston housing including a bore extending through the piston housing from the housing first end to the housing second end;
- a piston disposed inside the bore of the piston housing and comprising a piston first end opposite a piston second end, wherein the piston second end comprises a rounded surface;
- a main body joining the support post and the piston housing;
- and
- a rocker arm assembly extending from the post second end to the piston second end, wherein the rocker arm assembly is pivotally connected to the post second end and connected to the piston second end by a ball and socket joint, wherein the rocker arm assembly comprises:
- an arm with an arm first end extending away from the post second end and toward the piston second end;
- a seat connected to the arm first end and comprising a top plate and a dimple formed in the top plate, wherein the dimple mates with the rounded surface of the piston second end, and wherein a cross-section of the seat is U-shape;
- a coupler connected to the piston second end and connected to the seat, thereby joining the rounded surface of the piston second end and the dimple of the seat to form the ball and socket joint between the piston second end and the rocker arm assembly arm, wherein the coupler comprises:
- a platform positioned between the housing second end and the top plate of the seat, wherein the platform is connected to the piston between the piston first end and the piston second end;
- a first side and a second side both extending from the platform toward the arm first end and past the top plate of the seat;
- a first prong connected to the first side and extending between the arm first end and the top plate of the seat;
- and
- a second prong connected to the second side and extending between the arm first end and the top plate of the seat;
- and
- a spring is disposed around the piston housing between the main body and the coupler of the rocker arm assembly, wherein the spring is seated on the platform of the coupler.
13 more elements
A pump comprising:
- a support post comprising a post first end opposite a post second end;
- a piston housing extending from a housing first end to a housing second end, the piston housing including a bore extending through the piston housing from the housing first end to the housing second end;
- a piston disposed inside the bore of the piston housing and comprising a piston first end opposite a piston second end, wherein the piston second end comprises a rounded surface;
- a main body joining the support post and the piston housing;
- and
- a rocker arm assembly extending from the post second end to the piston second end, wherein the rocker arm assembly is pivotally connected to the post second end and connected to the piston second end by a ball and socket joint, wherein the rocker arm assembly comprises:
- an arm with an arm first end extending away from the post second end and toward the piston second end;
- a seat connected to the arm first end and comprising a top plate and a dimple formed in the top plate, wherein the dimple mates with the rounded surface of the piston second end;
- a coupler connected to the piston second end and connected to the seat, thereby joining the rounded surface of the piston second end and the dimple of the seat to form the ball and socket joint between the piston second end and the rocker arm assembly arm, wherein the coupler comprises:
- a platform positioned between the housing second end and the top plate of the seat, wherein the platform is connected to the piston between the piston first end and the piston second end;
- a first side and a second side both extending from the platform toward the arm first end and past the top plate of the seat;
- a first prong connected to the first side and extending between the arm first end and the top plate of the seat;
- a second prong connected to the second side and extending between the arm first end and the top plate of the seat;
- and
- a plurality of spring guards extending from the platform toward the piston housing;
- and
- a spring is disposed around the piston housing between the main body and the coupler of the rocker arm assembly, wherein the spring is seated on the platform of the coupler.
14 more elements
Dependencies are inferred from the claim text.