Pile driving and drawing apparatus

Claim 2

A pile driving and drawing apparatus comprising a guide member consisting of a rod provided with a flange adapted to be placed on the head of a pile to be driven into the ground; a weight assembly adapted to effect the relative movement with respect to said guide member, said assembly including a casing provided with a first portion for receiving the rod of said guide member in sliding engagement therewith and a second portion positioned below said first portion and adapted to impinge on said flange, and said assembly further including an excitor provided within said casing; and a resilient body placed between said flange and second portion of said casing, the natural frequency of said excitor being so arranged as to coincide with the free frequency of said weight assembly which is dependent on said resilient body.

Claim 3

A pile driving and drawing apparatus comprising a guide member consisting of a rod provided with one end adapted to be secured to the head of a pile to be drawn from the ground and the other end having a flange; a weight assembly effecting the relative movement with respect to said guide member, said assembly including a casing provided with a first portion for receiving the rod of said guide member in sliding engagement therewith and a second portion positioned above said first portion and adapted to impinge on said flange, said assembly further including an excitor provided within said casing; a first resilient body interposed between said weight assembly and means for suspending said assembly; and resilient second resilien body interposed between said flange and the second portion of said casing, the natural frequency of said excitor being so arranged as to coincide with the free frequency of said weight assembly which is dependent on said first and second resilient bodies.

Claim 4

A pile driving and drawing apparatus comprising a guide member consisting of a rod provided with one end adapted to be secured to the head of a pile to be drawn from the ground and the other end having a flange; a weight assembly effecting the relative movement with respect to said guide member, said assembly including a casing provided with a first portion for receiving the rod of said guide member in sliding engagement therewith and a second portion positioned above said first portion and adapted to impinge on said flange, said assembly further including an excitor provided within said casing; a first resilient body interposed between said weight assembly and means for suspending said assembly; and resilient second resilien body interposed between said flange and the second portion of said casing, the natural frequency of said excitor being so arranged as to coincide with the free frequency of said weight assembly which is dependent on said first and second resilient bodies.

Claim 5

A pile driving and drawing apparatus comprising: a guide member adapted to be secured to the head of a pile and consisting of a rod provided with upper and lower flanges; a weight assembly effecting the relative movement with respect to said guide member and including a casing provided with a bore portion adapted to receive the rod of said guide member in sliding engagement therewith and upper and lower shoulder portions which are positioned on opposite sides of said portion and adapted to impinge on said upper and lower flanges, respectively, said assembly further including an excitor housed in said casing; a first resilient body interposed between said weight assembly and means for suspending said assembly; and second and third resilient bodies placed between said lower flange and the lower shoulder portion of said casing and between said upper flanGe and the upper shoulder portion of said casing, respectively; the frequency of said excitor being so arranged as to coincide with the frequency of said weight assembly which is dependent on said second resilient body for driving a pile and the frequency of said excitor being so arranged as to coincide with the frequency of said weight assembly which is dependent on said first and third resilient bodies for drawing a pile.

Claim 6

A pile driving and drawing apparatus comprising: a guide member adapted to be secured to the head of a pile and consisting of a rod provided with upper and lower flanges; a weight assembly effecting the relative movement with respect to said guide member and including a casing provided with a bore portion adapted to receive the rod of said guide member in sliding engagement therewith and upper and lower shoulder portions which are positioned on opposite sides of said portion and adapted to impinge on said upper and lower flanges, respectively, said assembly further including an excitor housed in said casing; a first resilient body interposed between said weight assembly and means for suspending said assembly; and second and third resilient bodies placed between said lower flange and the lower shoulder portion of said casing and between said upper flanGe and the upper shoulder portion of said casing, respectively; the frequency of said excitor being so arranged as to coincide with the frequency of said weight assembly which is dependent on said second resilient body for driving a pile and the frequency of said excitor being so arranged as to coincide with the frequency of said weight assembly which is dependent on said first and third resilient bodies for drawing a pile.

Claim 7

A pile driving and drawing apparatus according to claim 3, wherein said excitor includes a pair of electromotive rotors and respective rotors are provided with weights positioned in eccentric fashion.

Claim 8

A pile driving and drawing apparatus according to claim 4, wherein said rotor is provided with a subsidiary eccentric weight removably attached to said eccentric weight.

Claim 9

A pile driving and drawing apparatus according to claim 3, wherein said first resilient body consists of a coil spring assembly, and said second and third resilient bodies are made of rubber-like resilient materials.

Claim 10

A pile driving and drawing apparatus according to claim 3, wherein said guide member is provided with a cap member of a cylindrical form at its lower end, said cap member having a plurality of spring biased members placed in a spaced relation around the periphery of said cap member and extending in a radial direction of a pile to be received within said cap member.

Claim 11

A pile driving and drawing apparatus according to claim 3, wherein said guide member is provided with a cap member of a cylindrical form pivotally connected to the lower end thereof, said cap member being provided with at least one spring biased member extending in a direction perpendicular to the axis of a pile to be received within said cap member.

Claim 12

A pile driving and drawing apparatus according to claim 3, wherein said casing is provided with a plurality of rollers engaging the side of the flange of said guide member.

Claim 13

A pile driving and drawing apparatus according to claim 3, wherein the casing, which houses said excitor, contains oil adapted to be circulated within said casing during the operation of said excitor, and said excitor is provided with a pair of rotors and weights disposed in eccentric relation to said rotors, said weights being provided with a plurality of oil vents and said casing having means for adjusting the pressure within said casing.

Claim 14

A pile driving and drawing apparatus comprising: a guide member adapted to be secured to the head of a pile; a weight assembly movably mounted on said guide member to exert downward or upward force on said pile, said weight assembly including an excitor contained therein; said guide member including a rod member provided with upper and lower flanges; said weight assembly defining a casing provided with a bore portion adapted to receive said rod member in sliding engagement therewith; and upper and lower shoulder portions which are positioned on opposite ends of said bore portion and adapted to impinge on said upper flange in pile drawing and lower flange in pile driving, respectively; a first resilient body for suspending said weight assembly; second and third resilient bodies interposed between said lower flange and the lower shoulder portions of said casing and between said upper flange and the upper shoulder portions of said casing, respectively; the clearance between said flange portions and said shoulder portions being larger than the amplitude of the weight assembly at the time it drives the pile into the hardest ground, and the frequency of said excitor being adapted to coincide with the frequency of said weight assembly which is dependent on said second resilient body for driving a pile and the frequency of said excitor, also being adapted to coincide with the frequency of said weight assembly which is dependent on said first and third resilient bodies for drawing a pile.

Claim 15

A pile driving and drawing apparatus comprising: a guide member adapted to be secured to the head of a pile; a weight assembly movably mounted on said guide member to exert downward or upward force on said pile, said weight assembly including an excitor contained therein; said guide member including a rod member provided with upper and lower flanges; said weight assembly defining a casing provided with a bore portion adapted to receive said rod member in sliding engagement therewith; and upper and lower shoulder portions which are positioned on opposite ends of said bore portion and adapted to impinge on said upper flange in pile drawing and lower flange in pile driving, respectively; a first resilient body for suspending said weight assembly; second and third resilient bodies interposed between said lower flange and the lower shoulder portions of said casing and between said upper flange and the upper shoulder portions of said casing, respectively; the clearance between said flange portions and said shoulder portions being larger than the amplitude of the weight assembly at the time it drives the pile into the hardest ground, and the frequency of said excitor being adapted to coincide with the frequency of said weight assembly which is dependent on said second resilient body for driving a pile and the frequency of said excitor, also being adapted to coincide with the frequency of said weight assembly which is dependent on said first and third resilient bodies for drawing a pile.

Claim 16

A pile driving and drawing apparatus comprising: suspension means to hold a first resilient body; a weight assembly attached to and suspended from said first resilient body; said weight assembly defining a casing and having an excitor operatively connected thereto; said casing having upper and lower compartments with a central bore communicating between said compartments; said upper compartment having an upwardly facing shoulder about said central bore and including a second resilient body thereabout; said lower compartment having a downwardly facing shoulder about said central bore and including a third resilient body thereabove; a guide member within said casing; said guide member having an upper flange member received in spaced relationship within said upper compartment, an integral rod portion extending in guided relationship through said central bore and a lower flange member received in spaced relationship within said lower compartment; said upper flange member being opposed to said second resilient body and said lower flange member being opposed to said third resilient body; the axial length of said rod portion of said guide member being longer than said central bore to define a clearance between said flange portions and said shoulders; said respective flange portions being engageable with said second and third resilient bodies; and means to connect said lower flange portion of said guide member to a pile; the clearance between said flange portions and said shoulder portions being larger than the amplitude of the weight assembly at the time it drives the pile into the hardest ground, and the frequency of said excitor being adapted to coincide with the frequency of said weight assembly which is dependent on said second resilient body for driving a pile and the frequency of said excitor, also being adapted to coincide with the frequency of said weight assembly which is dependent on said first and third resilient bodies for drawing a pile.

Claim 17

A pile driving and drawing apparatus comprising: suspension means to hold a first resilient body; a weight assembly attached to and suspended from said first resilient body; said weight assembly defining a casing and having an excitor operatively connected thereto; said casing having upper and lower compartments with a central bore communicating between said compartments; said upper compartment having an upwardly facing shoulder about said central bore and including a second resilient body thereabout; said lower compartment having a downwardly facing shoulder about said central bore and including a third resilient body thereabove; a guide member within said casing; said guide member having an upper flange member received in spaced relationship within said upper compartment, an integral rod portion extending in guided relationship through said central bore and a lower flange member received in spaced relationship within said lower compartment; said upper flange member being opposed to said second resilient body and said lower flange member being opposed to said third resilient body; the axial length of said rod portion of said guide member being longer than said central bore to define a clearance between said flange portions and said shoulders; said respective flange portions being engageable with said second and third resilient bodies; and means to connect said lower flange portion of said guide member to a pile; the clearance between said flange portions and said shoulder portions being larger than the amplitude of the weight assembly at the time it drives the pile into the hardest ground, and the frequency of said excitor being adapted to coincide with the frequency of said weight assembly which is dependent on said second resilient body for driving a pile and the frequency of said excitor, also being adapted to coincide with the frequency of said weight assembly which is dependent on said first and third resilient bodies for drawing a pile.

Claim 18

A pile driving and drawing apparatus in accordance with claim 12 wherein: said casing is provided with a pair of opposing side openings communicating on opposite sides thereof with said upper and lower flanges of said guide member; means supporting a plurality of rollers in each of said side openings on axes within the plane of said flanges whereby the inner peripheries of each plurality of rollers are engageable with the edges of said flanges; and dampening means are provided holding said roller supporting means and rollers in said peripheral engagement.

Claim 19

A pile driving and drawing apparatus in accordance with claim 12 wherein: said second and third resilient bodies each comprise opposing pads of rubber-like material affixed to said respective flange members and said shoulders.