US2831461A - Pile hammer having integral built-in surge tank and enclosed protected valve gear - Google Patents

Pile hammer having integral built-in surge tank and enclosed protected valve gear Download PDF

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Publication number
US2831461A
US2831461A US651960A US65196057A US2831461A US 2831461 A US2831461 A US 2831461A US 651960 A US651960 A US 651960A US 65196057 A US65196057 A US 65196057A US 2831461 A US2831461 A US 2831461A
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US
United States
Prior art keywords
valve
cylinder
surge tank
hammer
valve gear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US651960A
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English (en)
Inventor
John J Kupka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MCKIERMAN TERRY CORP
MCKIERMAN-TERRY Corp
Original Assignee
MCKIERMAN TERRY CORP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MCKIERMAN TERRY CORP filed Critical MCKIERMAN TERRY CORP
Priority to US651960A priority Critical patent/US2831461A/en
Priority to CH5473458A priority patent/CH362708A/de
Application granted granted Critical
Publication of US2831461A publication Critical patent/US2831461A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
    • E02D3/061—Tampers with directly acting explosion chambers
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/30—Tamping or vibrating apparatus other than rollers ; Devices for ramming individual paving elements
    • E01C19/34—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/02—Placing by driving
    • E02D7/06—Power-driven drivers
    • E02D7/10—Power-driven drivers with pressure-actuated hammer, i.e. the pressure fluid acting directly on the hammer structure

Definitions

  • One of the objects of the present invention is to utilize the desirable features of the surge tank but to incorporate it in such a way as to avoid and eliminate objectionable features such as mentioned.
  • Another object of this invention is to free the hammer structure of projecting parts such as have heretofore been in the way, and in many cases, been broken loose or knocked off in the relatively rough handling to which these machines are subjected.
  • valve gear it is a purpose of this invention to protect the valve gear and to locate it where it cannot be broken off or injured even in such rough action as skidding the hammer over the ground as sometimes happens.
  • Fig. 1 of the drawings is a vertical, sectional view of one of the hammers showing the ram up off the anvil far enough on upstroke for the cam on the ram to permit closing of the admission valve or, on downstroke, for
  • admission valve 27 closes as piston cam 29 leaves engagement with roller 28 and expansion continues until approximately three-quarters upstroke, whereupon a differential valve 34 operates to close 01f the exhaust valve and open a transfer or compounding valve for passing partially expanded live steam or air from below to above the piston for cushioning upstroke and for accelerating downstroke of the piston.
  • the steam chest 26 is extended upward to near the top of the hammer to form a surge tank or chamber 100 of substantial proportions, and a special feature of this construction is that the Walls forming this enclosure are integral with the upper cylinder and constitute, in effect, integral reinforcements of the same.
  • dilferential valve 34 is located within this surge chamber, where it is guarded and protected against mechanical injury and where it is preheated, lubricated, and kept in smooth working condition, and from which it directly derives the pressure for actuating it in'one direction.
  • This differential valve maybe considered as similar to that shown in Fig. 5 of Patent 2,789,540 involving an upper smaller diameter piston 49 and a connected lower larger diameter piston 50 carrying a cam 63 for actuating valve 68 controlling transfer of partially expanded steam or air from exhaust ports in the cylinder up through passage 60 and ports 61 into the top of the cylinder above the piston.
  • passages and ports 60 and 61 serve alternately for compounding to drive the piston downwardly and for exhausting from the top of the cylinder during upstroke of the piston as controlled by the differential valve.
  • This valve is operated automatically in the present invention by taking pressure from the expansion chamber 24 through a passage 57 to the underside of the lower larger diiferential piston 50 and by leaving the upper smaller differential piston 49 exposed to the live steam or compressed air pressure in the surge chamber by way of opening 33 in the top of the upper differential cylinder 55.
  • the two connected pistons With full pressure from the expansion chamber on the lower larger piston, the two connected pistons will be raised to the upper position to open exhaust ports and permit escape from the top of the cylinder down through passage 60 and out the exhaust pipes 58 and, as pressure reduces as the ram piston approaches the top of its stroke, the normal pressure present in the surge chamber acting on the upper smaller piston through opening 33, will force the differential pistons downward to close the exhaust valve and open the compounding valve 68 to transfer the partially reduced pressure power forces up through passage 60 into the top of the cylinder for cushioning upstroke and accelerating downstroke of the ram.
  • the dilferential valve is shown solidly secured to the body of the cylinder by bolts 92, and the admission valve by bolts so that these valves may be readily removed and replaced as separate, independent units, after removal of the cover plate 102 closing the surge chamber.
  • This cover is shown as of relatively large size so as to provide full access to the interior of the surge chamber and as recessed within a surrounding flange 103 so as to be protected against abrasion and other forces such as might result from skidding or sledding the hammer on its side.
  • the surge chamber cover is shown removably secured by stud bolts 104 and a supplemental cover 86 is shown secured by bolts 88 on the main cover, providing access to the admission valve without requiring removal of the large main cover.
  • the hammer may be dragged or pushed over ground or other supporting surface without injury.
  • valve mechanism located within the surge chamber attords mechanical protection of such parts and desirable preheating and anti-icing characteristics.
  • the valve mechanism By admission of steam or compressed air, the valve mechanism will be preheated, ready to start operations even after long shut-down under exposed cold weather conditions. This preheating and maintaining the valve gear in heated condition, reduces condensation and, in the case of compressed air operation, prevents icing up.
  • valve gear in the surge chamber also avoids need for separate connections to operate the ditferential valve since this valve can then take the normal pressure for balancing it against the variable pressure directly from within the surge chamber by a simple open passage 33.
  • the construction is simple and rugged and all moving parts are fully protected withinan enclosure which in addition to serving as a surge chamber, reinforces the construction and effects preheating and deicing and facilitates lubrication since lubrication of these machines is usually elfected by introducing lubricant with the steam or air and this admitted to the surge chamber in heated condition operates to thoroughly lubricate all parts.
  • the integral surge chamber encloses all cylinder passages and ports, reducing heat losses and aiding preheating.
  • This chest is shown as rounded to ride over a supporting surface and reduce obstruction in the case of it being necessary to drag the hammer as in shifting from one location to another.
  • Power hammer comprising the combination of cylinder and ram reciprocating therein, said cylinder having a longitudinally extending integral surge chamber on one side thereof provided with an inlet for actuating fluid at the lower end, an admission valve in the lower portion of said chamber controlling communication between the interior of said chamber and the cylinder, and valve mechanism in the upper portion of said surge chamber controlling communication between opposite end portions of the cylinder and including passages communicating with the cylinder enclosed within said surge chamber.
  • Power hammer comprising the combination of cylinder and ram reciprocating therein, said cylinder having an integral surge chamber on one side and dilferential valve mechanism enclosed Within said surge chamber and connected to control passage of motive fluid to and from the cylinder, said differential valve mechanism including opposed pistons of difierent areas and a connection extending from the cylinder to one. of said pistons, and a connection to the other of said pistons open to the interior of said surge chamber.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Soil Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Architecture (AREA)
  • Details Of Valves (AREA)
US651960A 1957-04-10 1957-04-10 Pile hammer having integral built-in surge tank and enclosed protected valve gear Expired - Lifetime US2831461A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US651960A US2831461A (en) 1957-04-10 1957-04-10 Pile hammer having integral built-in surge tank and enclosed protected valve gear
CH5473458A CH362708A (de) 1957-04-10 1958-01-16 Mit einem gas- oder dampfförmigen Druckmedium betriebene Ramme, insbesondere zum Verdichten der Pflasterung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US651960A US2831461A (en) 1957-04-10 1957-04-10 Pile hammer having integral built-in surge tank and enclosed protected valve gear

Publications (1)

Publication Number Publication Date
US2831461A true US2831461A (en) 1958-04-22

Family

ID=24614953

Family Applications (1)

Application Number Title Priority Date Filing Date
US651960A Expired - Lifetime US2831461A (en) 1957-04-10 1957-04-10 Pile hammer having integral built-in surge tank and enclosed protected valve gear

Country Status (2)

Country Link
US (1) US2831461A (de)
CH (1) CH362708A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138068A (en) * 1963-05-31 1964-06-23 Horn Pile & Foundation Corp Power hammer
US3359865A (en) * 1964-12-01 1967-12-26 Delmag Maschinenfabrik Ram or pile driver
US3408897A (en) * 1964-11-18 1968-11-05 Champion Inc Fluid power hammer having accumulator means to drive the hammer through its working stroke independent of the system pump
US4828068A (en) * 1984-02-02 1989-05-09 General Motors Corporation Hydraulically power assisted steering gear with pressure relief stop
US20100083659A1 (en) * 2008-08-04 2010-04-08 Man Nutzfahrzeuge Oesterreich Ag Reciprocating Expansion Engine and Piston of a Reciprocating Expansion Engine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1087799A (en) * 1910-06-10 1914-02-17 Leonard Fletcher Massey Elastic-fluid hammer.
US2789540A (en) * 1955-12-02 1957-04-23 Mckiernan Terry Corp Compound hammer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1087799A (en) * 1910-06-10 1914-02-17 Leonard Fletcher Massey Elastic-fluid hammer.
US2789540A (en) * 1955-12-02 1957-04-23 Mckiernan Terry Corp Compound hammer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3138068A (en) * 1963-05-31 1964-06-23 Horn Pile & Foundation Corp Power hammer
US3408897A (en) * 1964-11-18 1968-11-05 Champion Inc Fluid power hammer having accumulator means to drive the hammer through its working stroke independent of the system pump
US3359865A (en) * 1964-12-01 1967-12-26 Delmag Maschinenfabrik Ram or pile driver
US4828068A (en) * 1984-02-02 1989-05-09 General Motors Corporation Hydraulically power assisted steering gear with pressure relief stop
US20100083659A1 (en) * 2008-08-04 2010-04-08 Man Nutzfahrzeuge Oesterreich Ag Reciprocating Expansion Engine and Piston of a Reciprocating Expansion Engine
US8381524B2 (en) * 2008-08-04 2013-02-26 Man Nutzfahrzeuge Oesterreich Ag Reciprocating expansion engine and piston of a reciprocating expansion engine

Also Published As

Publication number Publication date
CH362708A (de) 1962-06-30

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