# US 8,539,922 B2 · Rigid primer bulb pump > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,539,922 B2 - Document ID: US8539922B2 - Status: Granted - Kind: B2 - Application number: 12/622,731 - Filed: 2009-11-20 - Published: 2011-04-14 - Granted: 2013-09-24 - Earliest claimed: 2008-02-08 - Assignees: Bluskies International LLC - Applicants: Christopher Brown; Marvin Peplow - Inventors: Christopher Brown; Marvin Peplow - Web page: https://patentgrep.com/patent/US8539922B2 ## CPC - F02M 37/16: characterised by provision of personally-, e.g. manually-, operated pumps - B63H 21/38: Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like ({in outboard drives B63H20/001; } lubricating or cooling machines or engines in general F01 - F04) - B63B 2231/40: Synthetic materials - F02B 61/045: {for marine engines} - F02M 37/007: {characterised by its use in vehicles, in stationary plants or in small engines, e.g. hand held tools} - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF - B63H: MARINE PROPULSION OR STEERING (propulsion of air-cushion vehicles B60V1/14; specially adapted for submarines, other than nuclear propulsion, B63G; specially adapted for torpedoes F42B19/00) - B63B: SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING (arrangements of vessel ventilation, heating, cooling, or air-conditioning B63J2/00; floating substructures as supports of dredgers or soil-shifting machines E02F9/06) - F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G) ## Abstract A hand operated primer pump for small marine or other engines generally spark ignition engines used on stern drive boats that prevents transfer of hydrocarbons into the atmosphere. The primer generally mimics and replaces prior art rubber primer bulbs in general shape and possibly color, although it can be made in any shape or color. It generally contains a pump that delivers a precise measured amount of fuel with each stroke of the actuator. The primer can have an ergonomically designed actuator that creates the farthest distance from a fulcrum point for maximum leverage and hence, maximum ease of use. The primer is generally designed with a continuous molded fuel path to seal any source of hydrocarbon leakage as well as being made from materials that prevent transfer of hydrocarbons to the atmosphere. ## Claims ### Claim 1 A primer pump for use on a fuel line for a marine engine comprising: a rigid housing containing a pump body, a fuel flow path, an entrance check plunger at a first end of said fuel flow path and an exit check plunger on a second end of said fuel flow path, said fuel flow path connectable at each end to fuel hoses; a rigid actuator pivotally attached to said housing, said actuator pressing on a spring-biased rigid piston and seal, said rigid piston and seal entering said pump body when said rigid actuator is depressed causing fuel contained in said pump body to flow into said fuel path; and wherein said rigid actuator is mounted directly on top of a cup-shaped piston guide, which fits onto an outside surface of a generally cylindrical piston housing with a protruding extremity at an upper end of the pump body; a first flexible hose connectable to a fuel supply attached to said first end of said fuel flow path; a second flexible hose connectable to a marine engine attached to said second end of said fuel flow path; a slot and tab mechanism between said piston guide and said pump body that prevents said piston guide from separating from said pump body. ### Claim 2 (depends on 1) The primer pump of claim 1 wherein said fuel flow path is made from material having a hydrocarbon permeation of less then around 15 g/sq. meter/day. ### Claim 3 (depends on 1) The primer pump of claim 1 wherein said seal is made from a low permeation elastomer. ### Claim 4 (depends on 1) The primer pump of claim 1 wherein said rigid housing comprises a right half shell and a left half shell, said shells closing around said pump body and check plungers. ### Claim 5 (depends on 1) The primer pump of claim 1 wherein said spring-biased rigid piston is biased by a stainless steel spring. ### Claim 6 (depends on 1) The primer pump of claim 1 wherein said spring-biased rigid piston is biased by a polymer spring. ### Claim 7 (depends on 1) The primer pump of claim 1 wherein said pump body and fuel-flow path are made from polybutylene terephthalate (PBT), polycarbonate, polycarbonate PBT (PC/PBT), Nylon 6, acetal (acetyl) or polyethylene's containing nano-sized platelets. ### Claim 8 A primer pump for a marine engine comprising: a rigid housing containing a pump body, a fuel flow path, an entrance check plunger at a first end of said fuel flow path and an exit check plunger on a second end of said fuel flow path, said fuel flow path connectable at each end to fuel hoses; a rigid actuator pivotally attached to said pump body, said actuator pressing on a spring-biased rigid piston and seal, said rigid piston and seal entering said pump body when said rigid actuator is depressed causing fuel contained in said pump body to flow into said fuel path; and wherein said rigid actuator is mounted directly on top of a cup-shaped piston guide, which fits onto an outside surface of a generally cylindrical piston housing with a protruding extremity at an upper end of the pump body; a first flexible hose connectable to a fuel supply attached to said first end of said fuel flow path; a second flexible hose connectable to a marine engine attached to said second end of said fuel flow path; and wherein said fuel flow path is made from material having a hydrocarbon permeation of less then around 15 g/sq. meter/day and said seal is made from a low permeation elastomer. ### Claim 9 (depends on 8) The primer pump of claim 8 wherein said rigid housing comprises a right half shell and a left half shell, said shells closing around said pump body and check plungers. ### Claim 10 (depends on 8) The primer pump of claim 8 wherein said spring-biased rigid piston is biased by a stainless steel spring. ### Claim 11 (depends on 8) The primer pump of claim 8 wherein said spring-biased rigid piston is biased by a polymer spring. ### Claim 12 (depends on 8) The primer pump of claim 8 wherein said pump body and fuel-flow path are made from polybutylene terephthalate (PBT), polycarbonate, polycarbonate PBT (PC/PBT), Nylon 6, acetal (acetyl) or polyethylene's containing nano-sized platelets.