Maruyama Mfg Co., Inc.
|Maruyama Mfg Co., Inc. Patent applications|
|Patent application number||Title||Published|
|20130309112||RECIPROCATING PUMP - In a reciprocating pump comprising a reciprocating member adapted to reciprocate as driven by a drive unit contained in a drive unit case, so as to perform a pumping action such that a liquid in use is aspirated into a pump chamber formed axially in front of the reciprocating member and pushed out under pressure and further comprising a high-pressure seal in slidable contact with an outer peripheral surface of the reciprocating member axially behind the pump chamber so as to prevent the liquid in use from leaking out when a high pressure is generated in the pump chamber, a flow path for the liquid in use to flow so as to bathe the drive unit therewith is provided within the drive unit case, while the rear side of the high-pressure seal is in contact with the liquid in use flowing through the drive unit case.||11-21-2013|
|20130239933||TWO-CYCLE ENGINE - A pair of suction-side scavenging ports introduces a working gas containing fuel into a combustion chamber, and the working gases are caused to collide with each other to thereby form a working gas layer in a state of two vortexes rotating in opposite directions to each other, and a pair of exhaust-side scavenging ports introduces a non-working gas having a lower fuel content rate than the working gas into the combustion chamber, and the non-working gases are caused to collide with each other to thereby form a non-working gas layer in a state of one vortex.||09-19-2013|
|20130047371||PORTABLE AIR BLOWER - A portable air blower includes: a first pipe having a first outlet opening communicating with a main body, the first pipe discharging wind generated in the main body through the first outlet opening; and a second pipe having a larger diameter than that of the first pipe, the second pipe being attached movably in the axial direction to the outer circumference of the first pipe and having a second outlet opening having a larger diameter than that of the first outlet opening. In the portable air blower, the second pipe is moved relative to the first pipe to dispose the second outlet opening upstream or downstream of the first outlet opening; the second pipe has an inflow window disposed upstream of the first outlet opening, the inflow window enabling air to flow from the outside into the second pipe.||02-28-2013|
|20120080468||BACKPACK TYPE WORKING MACHINE - A backpack type working machine has a main unit including a power source and a backpack band detachably attached to the main unit, for a worker to backpack the main unit and perform an operation. The back pack has a pad member including a belt-like cushion material and a belt-like band body extending along the pad member. The band body includes an upper end belt-like part branched from an upper end part of the pad member and an upper end joint for connecting the upper end belt-like part to the main unit. The main unit has an attachment for attaching thereto the upper end joint. When the upper end joint is attached to the attachment, the upper end part of the pad member comes into contact with the main unit from a worker side and is held downward.||04-05-2012|
|20110179653||CHAIN SAW - A chain saw an operator can easily strain a saw chain is provided. In the chain saw||07-28-2011|
|20110027106||RECIPROCATING PUMP - A reciprocating pump is provided that does not leak working liquid to the exterior. A communicating tube||02-03-2011|
|20100139637||TWO-STROKE ENGINE - An object is to provide a two-stroke engine achieving effective reduction of blow-by while implementing efficient gas exchange. In a two-stroke engine||06-10-2010|
|20100000053||PORTABLE BLOWER GRIP - An object is to provide a potable blower grip which can sufficiently reduce vibration and can lessen the worker's fatigue fully. A soft material grip||01-07-2010|
|20090257897||RECIPROCATING PUMP - The present invention provides a pump having a compact and lightweight design, which enables an improvement in pump efficiency and a reduction in noise. The pump comprises a manifold having a pump chamber, a suction port for sucking fluid from the outside to the inside of the manifold, a discharge port for discharging fluid from the inside to the outside of the manifold, a suction valve which is provided between a suction port and a pump chamber, and opens and closes a flow path of fluid to the pump chamber, and a discharge valve which is provided between the pump chamber and the discharge port, and opens and closes a flow path of fluid from the pump chamber. Furthermore, the suction port, the suction valve, the discharge valve and the discharge port are arranged coaxially, thereby the fluid does not meet unnecessary resistance, the fluid is made to flow smoothly, pump efficiency can be improved, noise can be reduced, and the structure of the manifold can be simplified and made compact and lightweight.||10-15-2009|
|20090123303||RECIPROCATING PUMP - The reciprocating pump for performing a pumping action by reciprocating an individual reciprocating member inside a plurality of cylinder sections arranged in parallel includes a seal case in which a cylinder section is formed and which functions as an independent pressure-resistant container; and a suction valve and a discharge valve in which a valve chamber is formed individually and each of which functions as an independent pressure-resistant container. The suction valve and the discharge valve are coupled so as to sandwich two planar sections from a direction perpendicular to a direction in which a plurality of cylinder sections are arranged in parallel in a state in which each of the suction valve and the discharge valve abuts against the respective one of the two planar sections of an external surface of a small diameter section at a front end side formed in the seal case, and the valve chamber is communicatively connected to the cylinder section. Thereby, the cylinder distance can be reduced while maintaining the thickness between cylinders and the assembling is facilitated.||05-14-2009|
Patent applications by Maruyama Mfg Co., Inc.