GB2018898A - Hydraulic control means - Google Patents
Hydraulic control meansInfo
- Publication number
- GB2018898A GB2018898A GB7910509A GB7910509A GB2018898A GB 2018898 A GB2018898 A GB 2018898A GB 7910509 A GB7910509 A GB 7910509A GB 7910509 A GB7910509 A GB 7910509A GB 2018898 A GB2018898 A GB 2018898A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- exhaust pressure
- control means
- assembly
- sub
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B45/00—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor
- B23B45/04—Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor driven by fluid-pressure or pneumatic power
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
A portable power-tool (100) comprises a hydraulic rotary motor (104), a handle sub-assembly (103) and a valve sub-assembly (112) with a block (111). The motor (104) has a driving shaft (105) which passes through a seal (106) subject to the exhaust pressure. The sub-assembly (112) includes an ON/OFF valve (113) and a flow-control means (114). A trigger control-member (117) operates the valve (113). The flow-control means (114) comprises a throttling valve-member (137). Exhaust pressure in a chamber (129) in the block (111) acts on the valve member (137) against a spring (139) to position the member (137) according to the exhaust pressure and thus throttle the input flow to the motor (104) so as to ensure that the exhaust pressure acting on the seal (106) does not become excessive. <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7910509A GB2018898B (en) | 1978-03-29 | 1979-03-26 | Hydraulic control means |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1230978 | 1978-03-29 | ||
GB7910509A GB2018898B (en) | 1978-03-29 | 1979-03-26 | Hydraulic control means |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2018898A true GB2018898A (en) | 1979-10-24 |
GB2018898B GB2018898B (en) | 1982-10-27 |
Family
ID=26248931
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7910509A Expired GB2018898B (en) | 1978-03-29 | 1979-03-26 | Hydraulic control means |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2018898B (en) |
-
1979
- 1979-03-26 GB GB7910509A patent/GB2018898B/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB2018898B (en) | 1982-10-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |