Pump

Claim 2

A reciprocating high pressure pump comprising: a pump housing having a low pressure inlet port, and a high pressure discharge port with a check valve therein, said ports being respectively disposed adjacent opposite ends of the housing; a reciprocable rod extending into the housing and having a rigid disc valve and a rigid perforate retainer disc fixed thereon in confronting relationship to each other and spaced from each other by a predetermined distance, the disc valve and retainer disc being oriented perpendicular to the rod and being widely spaced from the interior periphery of the housing, the housing also having a stationary yieldable annular seal encompassing the rod and in widely spaced relation with the rod; and a reciprocable, self-centering tube within the housing and spaced from the interior periphery thereof, said tube being slidably confined within the seal in sealing relation and the tube having smooth ends perpendicular to its axis, the sealengaging periphery of the tube and the seal being exposed to the liquid in both ends of the housing for lubricating effect, the tube encompassing the rod in widely spaced relation therewith to permit liquid flow through the tube, said tube being axially but not transversely confined between the disc valve and retainer disc and having a length less than said predetermined distance for free axial movement of the tube with respect to the reciprocating rod between the disc valve and the retainer disc, and to alternately lie flush against and seat against said disc valve and retainer disc as the rod is reciprocated, whereby cocking of the tube in the annular seal in response to limited transverse relocation of the tube with respect to the disc valve and retainer disc is prevented and whereby high pressure flow of liquid adjacent the discharge port is afforded.

Claim 3

A high speed, high pressure reciprocating pump for liquid to produce discharge pressures of 3 to 5,000 pounds per squaRe inch at 500 to 1,200 cycles per minute, comprising: an elongate, multiple part, demountable pump housing having a high pressure discharge port with a check valve therein and also having a low pressure inlet port, said ports being disposed adjacent opposite ends of the housing; a reciprocable rod extending into the housing through one end thereof; the housing also having a yieldable annular seal protruding inwardly from the interior periphery of the housing and encompassing the rod and in widely spaced relation with the rod; and an elongate, light weight, low inertia tube for high speed reciprocation, the tube having smooth inlet and outlet ends perpendicular to its axis, and a rigid disc valve mounted on the rod and oriented perpendicular of the rod and confronting the perpendicular inlet end of the tube to seat flushly thereagainst, the tube being slidably confined within the seal in sealing relation therewith for longitudinal sliding reciprocation through the seal and in spaced relation with the housing so that substantially the entire exterior periphery of the tube is wetted by the liquid in the housing as the tube reciprocates to provide lubrication, the disc valve being spaced from the inner housing periphery but having a diameter substantially in excess of the interior diameter of the tube to overlap the end of the wall of the tube and thereby produce valving action while permitting limited transverse relocation of the tube within the seal in accordance with the shape of the seal as the tube is reciprocated and to minimize wear of the seal and tube, and the rod having a readily removable rigid perforate retainer mounted thereon perpendicular of the rod and adjacent the perpendicular outlet end of the tube and contactable therewith, and the removable retainer and the disc valve being spaced apart a predetermined distance to permit limited longitudinal relative movement of the tube therebetween to alternately permit and restrict liquid flow through the tube as the rod is reciprocated, a spacer on the rod and contacting the retainer and disc valve to maintain the predetermined distance therebetween, said removable retainer being substantially non-restrictive to movement of the tube transversely of the rod to minimize localized friction and wear between the tube and seal as the tube is reciprocated and to prevent cocking of the tube within the seal in response to transverse movement of the tube with respect to the valve and retainer, said housing being adapted for ready disassembly adjacent its discharge port for ready and easy removal of the reciprocable tube axially of the housing.

Claim 4

A high speed, high pressure reciprocating pump for liquid to produce discharge pressures of 3 to 5,000 pounds per squaRe inch at 500 to 1,200 cycles per minute, comprising: an elongate, multiple part, demountable pump housing having a high pressure discharge port with a check valve therein and also having a low pressure inlet port, said ports being disposed adjacent opposite ends of the housing; a reciprocable rod extending into the housing through one end thereof; the housing also having a yieldable annular seal protruding inwardly from the interior periphery of the housing and encompassing the rod and in widely spaced relation with the rod; and an elongate, light weight, low inertia tube for high speed reciprocation, the tube having smooth inlet and outlet ends perpendicular to its axis, and a rigid disc valve mounted on the rod and oriented perpendicular of the rod and confronting the perpendicular inlet end of the tube to seat flushly thereagainst, the tube being slidably confined within the seal in sealing relation therewith for longitudinal sliding reciprocation through the seal and in spaced relation with the housing so that substantially the entire exterior periphery of the tube is wetted by the liquid in the housing as the tube reciprocates to provide lubrication, the disc valve being spaced from the inner housing periphery but having a diameter substantially in excess of the interior diameter of the tube to overlap the end of the wall of the tube and thereby produce valving action while permitting limited transverse relocation of the tube within the seal in accordance with the shape of the seal as the tube is reciprocated and to minimize wear of the seal and tube, and the rod having a readily removable rigid perforate retainer mounted thereon perpendicular of the rod and adjacent the perpendicular outlet end of the tube and contactable therewith, and the removable retainer and the disc valve being spaced apart a predetermined distance to permit limited longitudinal relative movement of the tube therebetween to alternately permit and restrict liquid flow through the tube as the rod is reciprocated, a spacer on the rod and contacting the retainer and disc valve to maintain the predetermined distance therebetween, said removable retainer being substantially non-restrictive to movement of the tube transversely of the rod to minimize localized friction and wear between the tube and seal as the tube is reciprocated and to prevent cocking of the tube within the seal in response to transverse movement of the tube with respect to the valve and retainer, said housing being adapted for ready disassembly adjacent its discharge port for ready and easy removal of the reciprocable tube axially of the housing.