Hydrostatic transmission power package

Claim 2

In a unitary power assembly; a combustion engine having an engine housing with an exterior wall, a power output shaft, power developing means in said engine housing delivering power to said shaft and an engine cooling fluid cavity in said engine housing around said powEr developing means; transmission means mounted directly on said exterior wall having a transmission cooling fluid cavity directly connected to said engine cooling fluid cavity.

Claim 3

The invention defined in claim 1 and said transmission means having an interface wall contacting said exterior wall and an opposite exterior wall having a double wall structure providing said transmission cooling fluid cavity therein to provide a cooling fluid cavity substantially covering said power developing means and transmission means.

Claim 4

The invention defined in claim 1 and said transmission means being a hydrostatic transmission having a pump, motor and interconnecting power transfer passages having exterior walls and said engine cooling fluid cavity and said transmission cooling fluid cavity covering substantially all of the exterior walls of said engine housing and exterior walls of said transmission means.

Claim 5

The invention defined in claim 1 and said engine housing exterior wall having an opening to said engine cooling fluid cavity and said transmission means having a fixed member having said transmission cooling fluid cavity secured to said exterior wall to close said opening and connect said engine and transmission cooling fluid cavities.

Claim 6

In a unitary power assembly; a combustion engine having an engine housing including an exterior wall having an exterior supporting pad having power transfer ports within said supporting pad; a hydrostatic transmission having a pump hydrostatic unit, a motor hydrostatic unit and connecting power transfer passage means including power transfer passage portions extending longitudinally within said exterior wall and then transversely to said power transfer ports; one of said hydrostatic units having a mounting pad with power transfer ports within said mounting pad and said hydrostatic unit being secured to said exterior wall with said power transfer ports in said supporting pad and mounting pad in fluid communication with each other.

Claim 7

In a unitary power assembly; a combustion engine having an engine housing including an exterior wall having an exterior supporting pad having power transfer ports within said supporting pad; a hydrostatic transmission having a pump hydrostatic unit, a motor hydrostatic unit and connecting power transfer passage means including power transfer passage portions extending longitudinally within said exterior wall and then transversely to said power transfer ports; one of said hydrostatic units having a mounting pad with power transfer ports within said mounting pad and said hydrostatic unit being secured to said exterior wall with said power transfer ports in said supporting pad and mounting pad in fluid communication with each other.

Claim 8

The invention defined in claim 5 and said one of said hydrostatic units having a housing having an inner and outer section and said inner section being formed as an integral part of said exterior wall.

Claim 9

The invention defined in claim 5 and said one hydrostatic unit having a cooling fluid cavity, said engine having a cooling fluid cavity and means directly interconnecting said cavities.

Claim 10

The invention defined in claim 5 and said engine housing including a cooling fluid cavity; said supporting pad including an opening around said power transfer ports therein, said one of said hydrostatic units including a pintle having said hydrostatic transmission mounting pad and having a pintle cooling fluid cavity and said pintle being secured to said exterior wall to close said opening and connect it to said pintle cooling fluid cavity and connect said power transfer ports in said supporting and mounting pads.

Claim 11

In a unitary power assembly; a combustion engine having an engine housing, a power output shaft rotatably mounted on said engine housing, engine power generating means in said housing connected to drive said output shaft, fluid cooling cavity means in said engine housing, a supporting pad surface on an external side of said engine housing and a cooling fluid port within said supporting pad surface; a hydrostatic transmission having a pump hydrostatic unit and a motor hydrostatic unit; one hydrostatic unit having a mounting pad surface, a cooling fluid cavity therein, and a cooling fluid port within said mounting pad surface and said one hydrostatic unit being secured to said engine housing with said supporting and mounting pad surfaces in face to face relation and said cooling fluid ports in each surface in fluid communication providing a common engine and hydrostatic unit fluid cooling system.

Claim 12

In a unitary power assembly; a combustion engine having an engine housing, a power output shaft rotatably mounted on said engine housing, engine power generating means in said housing connected to drive said output shaft, fluid cooling cavity means in said engine housing, a supporting pad surface on an external side of said engine housing and a cooling fluid port within said supporting pad surface; a hydrostatic transmission having a pump hydrostatic unit and a motor hydrostatic unit; one hydrostatic unit having a mounting pad surface, a cooling fluid cavity therein, and a cooling fluid port within said mounting pad surface and said one hydrostatic unit being secured to said engine housing with said supporting and mounting pad surfaces in face to face relation and said cooling fluid ports in each surface in fluid communication providing a common engine and hydrostatic unit fluid cooling system.

Claim 13

The invention described in claim 9 and said one hydrostatic unit having hydrostatic converting means and housing means surrounding said hydrostatic converting means having a double wall portion formiNg said cooling fluid cavity.

Claim 14

The invention described in claim 9 and said one hydrostatic unit having hydrostatic converting means including a fixed member having power transfer passages and ports and said cooling fluid cavity being in said fixed member.

Claim 15

The invention described in claim 9 and said one hydrostatic unit being a radial type unit having a unit housing, hydrostatic converting means including a cylindrical pintle fixed at one end to said unit housing and having power transfer passages and ports, a rotor mounted for rotation on said pintle and piston and cylinder means cooperating between said rotor and housing and said cooling fluid cavity being in said pintle.

Claim 16

In a unitary power assembly; a combustion engine having an engine housing having an engine cooling fluid cavity and fluid power transfer passages having walls contacted by cooling fluid in said engine cooling fluid cavity and a hydrostatic transmission having a hydrostatic pump unit, a hydrostatic motor unit and fluid power transfer passage means including said fluid power transfer passages in said engine housing interconnecting said hydrostatic pump and motor units.

Claim 17

In a unitary power assembly; a combustion engine having an engine housing having an engine cooling fluid cavity and fluid power transfer passages having walls contacted by cooling fluid in said engine cooling fluid cavity and a hydrostatic transmission having a hydrostatic pump unit, a hydrostatic motor unit and fluid power transfer passage means including said fluid power transfer passages in said engine housing interconnecting said hydrostatic pump and motor units.

Claim 18

The invention defined in claim 13 and one of said hydrostatic units having a cooling fluid cavity directly connected to said engine cooling cavity.

Claim 19

The invention defined in claim 13 and one of said hydrostatic units being a radial unit having a pintle; said fluid power transfer passage means also including pintle passages in said pintle and said pintle having a pintle cooling fluid cavity directly connected to said engine cooling fluid cavity.

Claim 20

The invention defined in claim 13 and said hydrostatic units being directly mounted on said engine housing and having fluid cooling cavities directly connected to said engine cooling fluid cavity.

Claim 21

In a unitary power assembly; a combustion engine having an engine housing, a power output shaft rotatably mounted on said engine housing, a hydrostatic pump supporting pad on one end of said engine housing, combustion engine power generating means in said engine housing operatively connected to deliver power to said output shaft, a hydrostatic motor supporting pad on each side of said engine housing and facing oppositely and outwardly from said engine housing; a hydrostatic pump unit mounted on said pump supporting pad and having a pump input shaft driven by said power output shaft; a hydrostatic motor unit mounted on each hydrostatic motor supporting pad and having a motor output shaft extending outwardly from said engine housing and supply and return power transfer passage means connecting said hydrostatic pump to each hydrostatic motor.

Claim 22

In a unitary power assembly; a combustion engine having an engine housing, a power output shaft rotatably mounted on said engine housing, a hydrostatic pump supporting pad on one end of said engine housing, combustion engine power generating means in said engine housing operatively connected to deliver power to said output shaft, a hydrostatic motor supporting pad on each side of said engine housing and facing oppositely and outwardly from said engine housing; a hydrostatic pump unit mounted on said pump supporting pad and having a pump input shaft driven by said power output shaft; a hydrostatic motor unit mounted on each hydrostatic motor supporting pad and having a motor output shaft extending outwardly from said engine housing and supply and return power transfer passage means connecting said hydrostatic pump to each hydrostatic motor.

Claim 23

The invention defined in claim 17 and said power transfer passage means having a passage pad on each side of said engine housing, a pair of passages connecting each passage pad to said motor supporting pad for supplying said hydrostatic motors and a unitary manifold having four pipes, a pump attachment plate secured to said four pipes and two motor attachment plates each secured to two pipes, said pump attachment plate being secured to said hydrostatic pump unit and each motor attachment plate being secured to said passage pad.

Claim 24

The invention defined in claim 17 and said pump having a housing having a mounting face engaging said supporting face on said engine housing and said power transfer passage means including passage portions in said pump housing extending to said mounting face and passage portions in said engine housing extending from said supporting face to said hydrostatic motor supporting pads.

Claim 25

The invention defined in claim 17 and said engine housing having an exterior wall; one of said hydrostatic units having a housing having one part formed as an integral part of said exterior wall of said engine housing and a cover part closing said one part.

Claim 26

In a unitary power assembly; a combustion engine having an engine housing have an engine cooling fluid cavity; a transmission unit having a tRansmission housing mounted on said engine housing; said transmission housing having a transmission cooling fluid passage connected to said engine cooling fluid cavity, a radiator connected to said transmission cooling fluid passage and means to return fluid from said radiator to said engine cooling fluid cavity for circulation of cooling fluid from said radiator in series through said engine cooling fluid cavity, said transmission cooling fluid passage and to said radiator.

Claim 27

In a unitary power assembly; a combustion engine having an engine housing have an engine cooling fluid cavity; a transmission unit having a tRansmission housing mounted on said engine housing; said transmission housing having a transmission cooling fluid passage connected to said engine cooling fluid cavity, a radiator connected to said transmission cooling fluid passage and means to return fluid from said radiator to said engine cooling fluid cavity for circulation of cooling fluid from said radiator in series through said engine cooling fluid cavity, said transmission cooling fluid passage and to said radiator.

Claim 28

The invention defined in claim 21 and said engine being a V-type having a V-type housing, a power output shaft rotatably mounted on and projecting from the upper central part of one end of said V-type engine housing and a cooling fluid port in each side upper portion of said one end of said V-type housing connected to said engine cooling fluid cavity; said transmission housing being secured in face to face relation to said one end of said engine housing covering said cooling fluid ports in said engine housing and having a transmission shaft aligned with and drive connected to said power output shaft and said transmission cooling passage being an inverted V-shaped passage having an apex and two legs with each leg connected to one of said cooling fluid ports and the apex connected to said radiator.

Claim 29

In a hydrostatic transmission; a hydrostatic motor unit, a hydrostatic pump unit, power transfer passage means connecting said hydrostatic units; one of said units including a stationary housing having stationary hydrostatic means and rotary hydrostatic means cooperating with said stationary hydrostatic means for converting fluid pressure and power, said stationary housing enclosing and supporting said stationary and rotary hydrostatic means and having an exterior stationary wall portion constituting a major heat and sound emitting portion of said housing; stationary jacket means on said housing covering and spaced from said stationary wall portion and having a rim sealed and secured to said wall portion providing a cooling liquid cavity between said wall portion and said jacket and having an internal wall surface formed by said wall portion and jacket means and means to maintain said jacket cavity filled with cooling liquid in substantially complete contact with said internal wall surface and to circulate the cooling fluid through said cavity to cool and silence the hydrostatic unit.

Claim 30

In a hydrostatic transmission; a hydrostatic motor unit, a hydrostatic pump unit, power transfer passage means connecting said hydrostatic units; one of said units including a stationary housing having stationary hydrostatic means and rotary hydrostatic means cooperating with said stationary hydrostatic means for converting fluid pressure and power, said stationary housing enclosing and supporting said stationary and rotary hydrostatic means and having an exterior stationary wall portion constituting a major heat and sound emitting portion of said housing; stationary jacket means on said housing covering and spaced from said stationary wall portion and having a rim sealed and secured to said wall portion providing a cooling liquid cavity between said wall portion and said jacket and having an internal wall surface formed by said wall portion and jacket means and means to maintain said jacket cavity filled with cooling liquid in substantially complete contact with said internal wall surface and to circulate the cooling fluid through said cavity to cool and silence the hydrostatic unit.

Claim 31

The invention defined in claim 23 and an engine having a housing having a cooling liquid cavity; said hydrostatic unit being a radial type unit with a cylindrical housing and having one end wall secured to said engine housing and the opposite end being said wall portion covered by said jacket to provide a cooling and silencing cooling liquid cavity at each end of said one hydrostatic unit.

Claim 32

In a hydrostatic transmission; a hydrostatic pump unit, a hydrostatic motor unit and power transfer passages connecting said hydrostatic units; one of said hydrostatic units having a unit housing a cylindrical pintle having an axis fixed at one end to said housing, a rotor mounted on said pintle for rotation about said pintle axis having an annular series of ports, a control ring nonrotatably mounted in said unit housing and having its axis eccentric to said pintle axis and piston and cylinder means operatively connected to said control ring and rotor and in fluid communication with said ports having relative reciprocating movement during rotation of said rotor; a pair of spaced chordal ports transversely located in said pintle symmetrically located on each side of a transverse line through said pintle axis and control ring axis, an axial passage extending from each chordal port to said one end of said pintle a cooling fluid cavity in said pintle between said chordal ports extending from said one end of said pintle almost to the other end of said pintle and a passage to supply cooling fluid to said cooling fluid cavity.

Claim 33

In a hydrostatic transmission; a hydrostatic pump unit, a hydrostatic motor unit and power transfer passages connecting said hydrostatic units; one of said hydrostatic units having a unit housing a cylindrical pintle having an axis fixed at one end to said housing, a rotor mounted on said pintle for rotation about said pintle axis having an annular series of ports, a control ring nonrotatably mounted in said unit housing and having its axis eccentric to said pintle axis and piston and cylinder means operatively connected to said control ring and rotor and in fluid communication with said ports having relative reciprocating movement during rotation of said rotor; a pair of spaced chordal ports transversely located in said pintle symmetrically located on each side of a transverse line through said pintle axis and control ring axis, an axial passage extending from each chordal port to said one end of said pintle a cooling fluid cavity in said pintle between said chordal ports extending from said one end of said pintle almost to the other end of said pintle and a passage to supply cooling fluid to said cooling fluid cavity.

Claim 34

The invention defined in claim 25 and a jacket covering a major wall portion of saiD housing to provide a cooling fluid cavity between said wall portion and jacket for cooling and silencing and passage means for supplying cooling fluid to said cavity between said wall and jacket to reduce heat and sound emission.