Abstract: An on/off valve (O/OV) and directional valves (DV1, DV2) are packaged with a switching valve system (10) in a housing assembly (156, 157, 158, 160). The on/off valve (O/OV) is operated by a control handle (154) that is located at one end of the housing assembly (156, 157, 158, 160). The direction control valves (DV1, DV2) are operated by a handle (141) located at the opposite end of the housing assembly (156, 157, 158, 160). The control handles (154, 141) operate to position cams (152, 136, 138) which function to help position valve plugs. In a second embodiment, the handle (141) and cams (136, 138) for controlling the directional valves (DV1, DV2) are replaced by a solenoid valve system (SV2) . A second solenoid valve (SV1) is added to the control system for the off/on valve (O/OV). The solenoid valve (SV1, SV2) allow for a remote positioning of the controls for the off/on and directional valves (O/OV, DV1, DV2).

Abstract: An on/off valve (O/OV) and directional valves (DV1, DV2) are packaged with a switching valve system (10) in a housing assembly (156, 157, 158, 160). The on/off valve (O/OV) is operated by a control handle (154) that is located at one end of the housing assembly (156, 157, 158, 160). The direction control valves (DV1, DV2) are operated by a handle (141) located at the opposite end of the housing assembly (156, 157, 158, 160). The control handles (154, 141) operate to position cams (152, 136, 138) which function to help position valve plugs. In a second embodiment, the handle (141) and cams (136, 138) for controlling the directional valves (DV1, DV2) are replaced by a solenoid valve system (SV2). A second solenoid valve (SV1) is added to the control system for the off/on valve (O/OV). The solenoid valve (SV1, SV2) allow for a remote positioning of the controls for the off/on and directional valves (O/OV, DV1, DV2).

Abstract: A dock (D) is provided with a reciprocating slat conveyor (12). A trailer (T) is provided with a reciprocating slat conveyor (10). The dock (D) includes a dock end (100) that includes mechanism for aligning the trailer conveyor (10) with the dock conveyor (12). This mechanism includes a guide rail 108 that is secured to a vehicle supporting apron (106) and is positioned to fit between the wheels (W) on one side of the rear of the trailer, for guiding the wheels towards the dock (D). The dock end (100) includes lifting rods (18, 20) which include lifting cams (22, 24). The cams (22, 24) are initially positioned below rear corner portions (14, 16) of the trailer (T). The lifter rods (18, 20) are then rotated to move the lifting cams (22, 24) up into a lifting position against the corner portions (14, 16). The lifter rods (18, 20) and cams (22, 24) are rotated to effect a vertical adjustment in position of the trailer conveyor (10) relative to the dock conveyor (12).

Abstract: In the drive assembly (10) of a reciprocating slat conveyor, three transverse drive beams (28, 30, 32) extend over and across three piston rods (22, 24, 26). The drive beams (28, 30, 32) have side flanges (74, 76) in which three pairs of downwardly opening recesses (78, 84, 80, 86, 82, 88) are formed. One pair of recesses (80, 86) receive upper portions of a first piston rod (22). The other two pairs of recesses (78, 84, 82, 88) receive plastic bearings (90) through which the other two piston rods (24, 26) extend. Each drive beam flange (74, 76) is provided with a cap member (142). Each cap member (142) includes an upwardly directed recess for each downwardly directed recess in its drive beam flange (74, 76). Bolts (144) extend through openings in the cap members (142) and thread into internally threaded openings in the drive beam flanges (74, 76).

Abstract: Three tandem drive units are provided. Outward variable volume working chambers at one end of the drive units are connected via passageways in the piston rods with inward variable volume working chambers at the opposite end of the drive units. In similar fashion, inward variable volume working chambers at the first ends of the drive units are connected to outward variable volume working chambers at the second ends of the drive units, also via passageways in the piston rods. At each end of the assembly, the piston rods pass through piston rod receiving openings in a cylinder head forming member. Each cylinder head forming member includes a manifold passageway and spool valves for controlling a sequencing movement of the drive units. The piston rods provide the spools for the spool valves.

Abstract: Side-by-side conveyor slats (62) have laterally outwardly extending opposite upper side portions (72,74), each including a depending, longitudinal support and seal bead (B) having a lower edge that contacts and slides along a longitudinal bearing/seal surface (78) on a longitudinal support beam (14) that is below it. The conveyor slats (62) have laterally spaced apart depending leg portions (24, 26), each with a laterally outwardly directed flange (64, 66). These flanges (64,66) are offset vertically below the upper side portion (72, 74) on its side of the conveyor slat (62). A longitudinal support beam (14) is positioned between each adjoining pair of conveyor slats (62), below adjacent upper side portions (72, 74) of the adjoining conveyor slats (62). A longitudinal bearing/seal member (80) is supported on, extends along and is connected to each support beam (14).

Abstract: A resin matrix (70) is formed and reinforcement fibers (72) and thermoplastic material (74) are added to the resin matrix (72). The resin matrix (70), the reinforcement fibers (72) and the thermoplastic material are moved through a pultrusion die (76), by pulling on the reinforcement fibers (72), to form a conveyor slat having a top portion (38) and a pair of laterally spaced apart side portions (40, 42) depending from the top portion (38). In the pultrusion die (76) heat is applied to melt the thermoplastic material (74) and cause it to migrate to an outer surface portion of the slat body. A veil (90) of thermoplastic material may be bonded to the surface layer of thermoplastic material.

Abstract: A conveyor slat (10) includes a top (12) two laterally spaced apart sidewalls (22, 24), two bottom flanges (26, 28) projecting laterally inwardly from lower portions of the sidewalls (22,24), and a channel space (CS) that is vertically between the top (12) and the bottom flanges (26, 28) and horizontally between the sidewalls (22, 24). A reinforcement insert (38) is positioned within the channel space (CS). The reinforcement insert (38) comprises an elongated body (38) having a top (40), two opposite sidewalls (42, 44) depending from the top (40), a longitudinal channel (45) in the top (40), and an opening (46) in the top communicating with the longitudinal channel (45). The insert (38) is shaped and dimensioned to fit within the channel space (CS) of the conveyor slat (10), horizontally between the two sidewalls (22, 24) of the conveyor slat (10) and vertically between the top (12) and the bottom flanges (26, 28) of the conveyor slat (10).

Abstract: A reciprocating slat conveyor has upper and lower sections formed by upper and lower conveyor slats (14, 12). The upper section is at the forward end of a receptacle (10) in which the conveyor is located. It includes a transition wall (150) that extends the full width of the conveyor. Transition wall (150) is connected to a rear drive beam (28). There are two additional drive beams (24, 26) forwardly of drive beam (28). The upper conveyor slats (14) are connected to the three drive beams (24, 28, 30). The upper conveyor slats (14) are divided into three sets, one for each drive beam (24, 28, 30). The lower conveyor slats (12) are also divided into three sets, one for each drive beam (24, 26, 28) and are connected to the drive beams (24, 26, 28). The upper conveyor slats (14) move with the lower conveyor slats (12) of the same set.

Abstract: Three tandem drive units are provided. Outward variable volume working chambers at one end of the drive units are connected via passageways in the piston rods with inward variable volume working chambers at the opposite end of the drive units. In similar fashion, inward variable volume working chambers at the first ends of the drive units are connected to outward variable volume working chambers at the second ends of the drive units, also via passageways in the piston rods. At each end of the assembly, the piston rods pass through piston rod receiving openings in a cylinder head forming member. Each cylinder head forming member includes a manifold passageway and spool valves for controlling a sequencing movement of the drive units. The piston rods provide the spools for the spool valves.

Abstract: A conveyor includes floor slats 36 connected to transverse drive beams 20 by connectors 22. Each connector 22 comprises a base 24 secured to the corresponding drive beam 20 and a nut element 30. Laterally elongated openings in the base allow the base and nut element to move laterally in relation to one another during attachment of the floor slat 36 to the drive beam 20. The base and nut element may have a laterally extending tongue and groove interface 42. Each slat has longitudinally spaced preformed openings at least one of which is positioned over each drive beam to allow the slat to be connected to any one of the drive beams.

Abstract: A semi-annular sleeve segment (60) is welded (78) to a drive member (24). Sleeve segment (60) presents abutment surfaces (52, 54) at its ends which upstand from the drive member (24). The abutment surfaces (52, 54) are contiguous inside surface portion (56, 58) of upper clamp parts (30, 32) that are welded to a transverse drive beam (18). The transverse drive beam (18) extends across the drive member (24). Downwardly directed recesses (34) in the upper clamp parts (30, 32) receive upper portions of the drive member (24). Lower clamp parts (36, 38), having upwardly directed recesses (40) are moved upwardly until lower portions of the drive member (24) are within the recesses (40). Bolts (48) are inserted through bolt openings (42) in the lower clamp parts (36, 38) and are then screwed into threaded openings (44) in the upper clamp parts (30, 32).

Abstract: Bolt fasteners extend through a bottom wall (38) in longitudinal guide beams (14), to secure the guide beams (14) to transverse frame members (70, 72). The guide beams (14) include sidewalls (40, 42) which extend upwardly from the bottom wall (30) to laterally outwardly extending top flanges (44, 46). The bolts may be installed from above by use of a tool that is inserted into the space between the sidewalls (40, 42). After the guide beams (14) are secured to the frame members (70, 72), bearing/seal members (48) are snap-fitted onto the tops of the support beams (14). Conveyor slats are installed in the spaces between the support beams (14). The conveyor slats (10) include side portions (20, 22) which extend laterally outwardly into positions above the bearing/seal members (48). The side members (20, 22) include downwardly extending beads B which contact the upper surfaces (62) of the bearing/seal members (48).

Abstract: A drive assembly has a plurality of piston/cylinder drive units each of which has a piston component longitudinally fixed to a fixed transverse frame member. First and second working chambers in a movable cylinder component are connected to pressure and return through passageways extending through the piston rod of the piston component. A ball member on the outer end of the piston rod is received in a socket structure that has passageways communicating with the piston passageways. A manifold structure is secured to the socket structures and houses a plurality of internal valves including a switching valve with a single external pressure port and a single external return port. The socket structures and manifold structure have abutting surfaces that form internal fluid connections to allow operation of the conveyor without external fluid ports other than the two ports of the switching valve.

Abstract: In a reciprocating slat conveyor, at least three slat sets of at least one slat (CS) each are driven by piston-cylinder drive units (26), one for each slat set. Each drive unit (26) is provided with a four-way proportional directional control (PDC) valve. Each PDC valve has a first position of adjustment in which it connects a first working chamber of its drive unit (26) to pressure (B) and a second working chamber to tank (T), and a second position of adjustment in which it connects the second working chamber to pressure (P) and the first working chamber to tank (T). Control logic (96) provides electrical control signals for directing the PDC valves to operate the drive units to advance more than half of the slat sets simultaneously in a first, conveying direction, and to retract the remaining slat sets in the opposite direction at a higher rate of speed. A controller compares the control logic signals with feedback signals generated by a separate linear position sensor PS for each slat set.

Abstract: A plurality of elongated, generally side-by-side conveyor tubes (28) are positioned within a material container (10) to provide spaces (30) between the conveyor tubes (28). A drive mechanism (DM) is connected to ends of the conveyor tubes (28), for reciprocating the conveyor tubes (28). The drive mechanism (DM) functions to move the conveyor tubes (28) in one direction, for moving material that is on and between the conveyor tubes (28), and for retracting the conveyor tubes (28) in the opposite direction.

Abstract: A power driven, reciprocating slat conveyor (12) is provided on a dock (D). A passive, reciprocating slat conveyor (10) is provided within a trailer (T). The power driven conveyor (12) is coupled to the passive conveyor (10) so that the drive mechanism of the power driven conveyor (12) can be used to operate both conveyors (10, 12) in conjunction. All of the conveyor slats (14) of the dock conveyor (12) can be directly connected to corresponding conveyor slats (16) of the trailer conveyor (10). Or, one conveyor slat (14) from each set of conveyor slats in the power driven conveyor (12) can be connected to a corresponding conveyor slat in the passive conveyor (10) and these conveyor slats in the passive conveyor (10) can each be connected to a transverse drive beam which is connected to the remaining conveyor slats of the same set of conveyor slats. Or, the drive units of the powered conveyor (12) can be coupled to transverse drive beams which are connected to the sets of slats in the passive conveyor (10).

Abstract: Side-by-side conveyor slats (62) have laterally outwardly extending opposite upper side portions (72,74), each including a depending, longitudinal support and seal bead (B) having a lower edge that contacts and slides along a longitudinal bearing/seal surface (78) on a longitudinal support beam (14) that is below it. The conveyor slats (62) have laterally spaced apart depending leg portions (24,26), each with a laterally outwardly directed flange (64,66). These flanges (64,66) are offset vertically below the upper side portion (72,74) on its side of the conveyor slat (62). A longitudinal support beam (14) is positioned between each adjoining pair of conveyor slats (62), below adjacent upper side portions (72,74) of the adjoining conveyor slats (62). A longitudinal bearing/seal member (80) is supported on, extends along and is connected to each support beam (14).

Abstract: A plurality of elongated, generally side-by-side conveyor tubes (28) are positioned within a material container (10) to provide spaces (30) between the conveyor tubes (28). A drive mechanism (DM) is connected to ends of the conveyor tubes (28), for reciprocating the conveyor tubes (28). The drive mechanism (DM) functions to move the conveyor tubes (28) in one direction, for moving material that is on and between the conveyor tubes (28), and for retracting the conveyor tubes (28) in the opposite direction.

Abstract: Side-by-side conveyor slats (62) have laterally outwardly extending opposite upper side portions (72,74), each including a depending, longitudinal support and seal bead (B) having a lower edge that contacts and slides along a longitudinal bearing/seal surface (78) on a longitudinal support beam (14) that is below it. The conveyor slats (62) have laterally spaced apart depending leg portions (24, 26), each with a laterally outwardly directed flange (64, 66). These flanges (64,66) are offset vertically below the upper side portion (72, 74) on its side of the conveyor slat (62). A longitudinal support beam (14) is positioned between each adjoining pair of conveyor slats (62), below adjacent upper side portions (72, 74) of the adjoining conveyor slats (62). A longitudinal bearing/seal member (80) is supported on, extends along and is connected to each support beam (14).