GB1039229A - Control of variable-stroke power hammers - Google Patents
Control of variable-stroke power hammersInfo
- Publication number
- GB1039229A GB1039229A GB8038/65A GB803865A GB1039229A GB 1039229 A GB1039229 A GB 1039229A GB 8038/65 A GB8038/65 A GB 8038/65A GB 803865 A GB803865 A GB 803865A GB 1039229 A GB1039229 A GB 1039229A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- ram
- piston
- cylinder
- rise
- 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
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
1,039,229. Power hammers. RAYMOND INTERNATIONAL Inc. Feb. 24, 1965 [April 15, 1964], No. 8038/65. Heading B3H. [Also in Division E1] An hydraulic power hammer, suitable for use in pile driving, includes a ram 21 attached to a piston 41 in a cylinder 12, and controlled by means of a cycling valve 34. After each downward working stroke of the ram the valve is reset for raising the ram by means of a water hammer effect. A vertically slidable cam 28 moves with the ram, a cam follower 29 being linked to the spool 33 of the valve. As shown, the piston and ram are moving downwardly since the fluid supplied from a source 42 to the upper part of the cylinder, through lines 44, 45, 46 and 47, acts on a greater area than that supplied at 56 to the lower part of the cylinder. When the ram strikes a pile, the sudden deceleration of the piston causes a sudden rise in pressure in the line 47, due to water hammer, this rise causing a release valve 50 to move the valve spool 33 to the right. This vents the upper end of the cylinder through lines 54, 55, and 43, thereby causing the piston to rise. Simultaneously the cam follower is rotated by the link 32 to the dotted position so that, as the piston nears the top of the cylinder, the cam 28 shifts the follower out again to reset the cycling valve to its first position. Should the ram not strike a pile, the piston passes inlet 56 and is cushioned on the volume of fluid beneath the piston, a check valve 57 preventing an excessive pressure rise in this volume. The cycling valve 34 is still actuated, however, the general rise in pressure of the system as provided by a positive displacement pump causing the valve 50 to operate. A modified but basically similar arrangement can be used where the valve 34 acts as a pilot valve, and a further, cycling, valve is provided. Figs. 7 and 8 (not shown) indicate a possible disposition of the power hammer in a cylindrical shell 80, the cylinder 53 being integral with the main housing 82 of the apparatus. A ram 86 is shown compressing a bulb pile 88 prior to filling the shell 80 with concrete.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US359911A US3298447A (en) | 1964-04-15 | 1964-04-15 | Control of variable-stroke power hammers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1039229A true GB1039229A (en) | 1966-08-17 |
Family
ID=23415795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8038/65A Expired GB1039229A (en) | 1964-04-15 | 1965-02-24 | Control of variable-stroke power hammers |
Country Status (4)
Country | Link |
---|---|
US (1) | US3298447A (en) |
BE (1) | BE662446A (en) |
GB (1) | GB1039229A (en) |
NL (1) | NL6504906A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD929405S1 (en) * | 2019-11-11 | 2021-08-31 | C-Smartlink Information Technology Co., Limited | Multi-function hub |
CN113502817A (en) * | 2021-08-06 | 2021-10-15 | 湖北波森特岩土工程有限公司 | Method for automatically constructing prestressed pile |
USD970448S1 (en) * | 2021-07-07 | 2022-11-22 | Xiaoqin Zhou | Socket |
USD975652S1 (en) * | 2021-04-08 | 2023-01-17 | Guange (Shenzhen) Electric Co., Ltd. | Power strip |
USD981961S1 (en) * | 2021-06-01 | 2023-03-28 | Shenzhen Ouli Technology Co., Ltd. | Socket |
USD986829S1 (en) * | 2019-04-09 | 2023-05-23 | Eaton Intelligent Power Limited | Uninterruptible power supply |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4020744A (en) * | 1974-11-13 | 1977-05-03 | Raymond International Inc. | Control of hydraulically powered equipment |
WO1983004427A1 (en) * | 1982-06-08 | 1983-12-22 | Intreprinderea De Utilaj Greu "Progresul" | Control device and method for hydraulic pulse generators |
CN102995639B (en) * | 2012-12-20 | 2014-10-15 | 湖南科技大学 | Environmental friendliness and energy conversation type water pressure driving pile driver |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2363235A (en) * | 1941-01-25 | 1944-11-21 | Adel Prec Products Corp | Control valve |
US2314560A (en) * | 1941-05-05 | 1943-03-23 | Consoco Inc | Torque control in rotary well drilling |
US2770222A (en) * | 1953-05-13 | 1956-11-13 | Anderson James | Hydraulic system of lathes and other metal working machines, presses, and the like |
US2937619A (en) * | 1957-02-11 | 1960-05-24 | Ingersoll Rand Co | Hole cleaning device |
US2897782A (en) * | 1957-06-25 | 1959-08-04 | Harold T Kennedy | Impact tools operated by compressible pressure fluid |
US2987886A (en) * | 1958-09-02 | 1961-06-13 | Union Oil Co | Apparatus for valve sequence operation |
US3071116A (en) * | 1959-12-14 | 1963-01-01 | Martonair Ltd | Pneumatic hammer |
US3225842A (en) * | 1963-01-07 | 1965-12-28 | Rex Chainbelt Inc | Self-propelled percussion tool assembly |
-
1964
- 1964-04-15 US US359911A patent/US3298447A/en not_active Expired - Lifetime
-
1965
- 1965-02-24 GB GB8038/65A patent/GB1039229A/en not_active Expired
- 1965-04-13 BE BE662446D patent/BE662446A/xx unknown
- 1965-04-15 NL NL6504906A patent/NL6504906A/xx unknown
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD986829S1 (en) * | 2019-04-09 | 2023-05-23 | Eaton Intelligent Power Limited | Uninterruptible power supply |
USD929405S1 (en) * | 2019-11-11 | 2021-08-31 | C-Smartlink Information Technology Co., Limited | Multi-function hub |
USD975652S1 (en) * | 2021-04-08 | 2023-01-17 | Guange (Shenzhen) Electric Co., Ltd. | Power strip |
USD981961S1 (en) * | 2021-06-01 | 2023-03-28 | Shenzhen Ouli Technology Co., Ltd. | Socket |
USD970448S1 (en) * | 2021-07-07 | 2022-11-22 | Xiaoqin Zhou | Socket |
CN113502817A (en) * | 2021-08-06 | 2021-10-15 | 湖北波森特岩土工程有限公司 | Method for automatically constructing prestressed pile |
Also Published As
Publication number | Publication date |
---|---|
BE662446A (en) | 1965-10-13 |
NL6504906A (en) | 1965-10-18 |
US3298447A (en) | 1967-01-17 |
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